Delavirdine is used to treat human immunodeficiency virus (HIV) infection in patients with or without acquired immunodeficiency syndrome (AIDS). Delavirdine is not a cure and may not decrease the number of HIV-related illnesses. Delavirdine does not prevent the spread of HIV to other people.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Dapiprazole causes the pupil of the eye to constrict. It reverses pupil dilation caused by other drugs given during an eye examination.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Diphenoxylate and atropine is used to control diarrhea.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Dofetilide is used to treat irregular heartbeats. It improves your heart rhythm by relaxing an overactive heart.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Diflorasone is used to treat the itching, redness, dryness, crusting, scaling, inflammation (swelling), and discomfort of various skin conditions. Diflorasone is in a class of medications called topical steroids. It works by reducing inflammation and itching.

Dutasteride is used to treat an enlarged prostate (benign prostatic hyperplasia, or BPH). Dutasteride is in a class of medications called 5-alpha reductase inhibitors. It works by blocking the production of a natural substance that enlarges the prostate. This shrinks the prostate, relieves symptoms of BPH, such as frequent and difficult urination, and decreases the chance that surgery will be needed to treat this condition.

Dihydroergotamine is used to treat migraine headaches. Dihydroergotamine is in a class of medications called ergot alkaloids. It works by tightening blood vessels in the brain and by stopping the release of natural substances in the brain that cause swelling.

Duloxetine is used to treat depression.Duloxetine is also used to treat pain and tingling caused by diabetic neuropathy (damage to nerves that can develop in people who have diabetes). Duloxetine is in a class of medications called selective serotonin and norepinephrine reuptake inhibitors (SSNRIs). It works by increasing the amounts of serotonin and norepinephrine, natural substances in the brain that help maintain mental balance and stop the movement of pain signals in the brain.

Diazepam is used to relieve anxiety, muscle spasms, and seizures and to control agitation caused by alcohol withdrawal.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Demeclocycline is an antibiotic used to treat bacterial infections. Antibiotics will not work for colds, flu, or other viral infections.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Digoxin is used to treat heart failure and abnormal heart rhythms (arrhythmias). It helps the heart work better and it helps control your heart rate.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Doxepin, an antidepressant, is used to treat depression and anxiety.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Dextromethorphan, an antitussive, is used to relieve a nonproductive cough caused by a cold, the flu, or other conditions.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Doxylamine, an antihistamine, causes drowsiness as a side effect and is used in the short-term treatment of insomnia. It is also used, in combination with decongestants, to relieve cough and cold symptoms.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Dantrolene, a muscle relaxant, is used to treat spasticity or muscle spasms associated with spinal cord injuries, stroke, multiple sclerosis, cerebral palsy, or other conditions.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Disulfiram is used to treat chronic alcoholism. It causes unpleasant effects when even small amounts of alcohol are consumed. These effects include flushing of the face, headache, nausea, vomiting, chest pain, weakness, blurred vision, mental confusion, sweating, choking, breathing difficulty, and anxiety. These effects begin about 10 minutes after alcohol enters the body and last for 1 hour or more. Disulfiram is not a cure for alcoholism, but discourages drinking.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Dexamethasone, a corticosteroid, is similar to a natural hormone produced by your adrenal glands. It often is used to replace this chemical when your body does not make enough of it. It relieves inflammation (swelling, heat, redness, and pain) and is used to treat certain forms of arthritis; skin, blood, kidney, eye, thyroid, and intestinal disorders (e.g., colitis); severe allergies; and asthma. Dexamethasone is also used to treat certain types of cancer.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Desmopressin is a chemical that is similar to a hormone found naturally in your body. It increases urine concentration and decreases urine production. Desmopressin is used to prevent and control excessive thirst, urination, and dehydration caused by injury, surgery, and certain medical conditions, allowing you to sleep through the night without awakening to urinate. It is also used to treat specific types of diabetes insipidus and conditions after head injury or pituitary surgery.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Diltiazem is used to treat high blood pressure and to control chest pain (angina). Diltiazem is in a class of medications called calcium-channel blockers. It works by relaxing the blood vessels so the heart does not have to pump as hard. It also increases the supply of blood and oxygen to the heart.

Dicloxacillin is a penicillin-like antibiotic used to treat certain infections caused by bacteria such as pneumonia and bone, ear, skin, and urinary tract infections. Antibiotics will not work for colds, flu, or other viral infections.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Diclofenac is used to relieve the pain, tenderness, inflammation (swelling), and stiffness caused by osteoarthritis and rheumatoid arthritis and ankylosing spondylitis. Immediate-release (short-acting) diclofenac (Cataflam) is also used to treat painful menstrual periods and pain from other causes. Diclofenac is in a class of medications called nonsteroidal anti-inflammatory medications (NSAIDs). It works by stopping the body's production of a substance that causes pain and inflammation.

Doxazosin is used to treat the symptoms of an enlarged prostate (benign prostatic hyperplasia or BPH), which include difficulty urinating (hesitation, dribbling, weak stream, and incomplete bladder emptying), painful urination, and urinary frequency and urgency. It is also used alone or in combination with other medications to treat high blood pressure. Doxazosin is in a class of medications called alpha-blockers. It relieves the symptoms of BPH by relaxing the muscles of the bladder and prostate. It lowers blood pressure by relaxing the blood vessels so that blood can flow more easily through the body.

Dorzolamide is used to treat glaucoma, a condition in which increased pressure in the eye can lead to gradual loss of vision. Dorzolamide decreases the pressure in the eye.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Dacarbazine ( da-KAR-ba-zeen) belongs to the group of medicines called alkylating agents. It is used to treat cancer of the lymph system and malignant melanoma (a type of skin cancer). It may also be used to treat other kinds of cancer, as determined by your doctor.

Dacarbazine interferes with the growth of cancer cells, which are eventually destroyed. Since the growth of normal body cells may also be affected by dacarbazine, other effects will also occur. Some of these may be serious and must be reported to your doctor. Other effects, like hair loss, may not be serious but may cause concern. Some effects may not occur for months or years after the medicine is used.

Before you begin treatment with dacarbazine, you and your doctor should talk about the good this medicine will do as well as the risks of using it.

Dacarbazine is to be administered only by or under the immediate supervision of your doctor. It is available in the following dosage form:

Parenteral
• Injection (U.S. and Canada)

Danazol ( DA-na-zole) may be used for a number of different medical problems. These include treatment of:

• pain and/or infertility due to endometriosis;
• a tendency for females to develop cysts in the breasts (fibrocystic breast disease); or
• hereditary angioedema, which causes swelling of the face, arms, legs, throat, windpipe, bowels, or sexual organs.

Danazol may also be used for other conditions as determined by your doctor.

This medicine is available only with your doctor's prescription, in the following dosage form:

Oral
• Capsules (U.S. and Canada)

Dapsone (DAP-sone) , a sulfone, belongs to the family of medicines called anti-infectives.

Dapsone is used to treat leprosy (Hansen's disease) and to help control dermatitis herpetiformis, a skin problem. When it is used to treat leprosy, dapsone may be given with one or more other medicines. Dapsone may also be used for other conditions as determined by your doctor.

Dapsone is available only with your doctor's prescription, in the following dosage form:

Oral
• Tablets (U.S. and Canada)

Decongestant and analgesic combinations are taken by mouth to relieve sinus and nasal congestion (stuffy nose) and headache of colds, allergy, and hay fever.

Decongestants, such as phenylephrine, and pseudoephedrine produce a narrowing of blood vessels. This leads to clearing of nasal congestion, but it may also cause an increase in blood pressure in patients who have high blood pressure.

Analgesics, such as acetaminophen, ibuprofen, and salicylates (e.g., aspirin, salicylamide), are used in these combination medicines to help relieve headache and sinus pain.

Acetaminophen and salicylates may cause kidney damage or cancer of the kidney or urinary bladder if large amounts of both medicines are taken together for a long time. However, taking the recommended amounts of combination medicines that contain both acetaminophen and a salicylate for short periods of time has not been shown to cause these unwanted effects.

These medicines are available without a prescription. However, your doctor may have special instructions on the proper dose of these medicines for your medical condition. They are available in the following dosage forms:

Oral
• Phenylephrine and Acetaminophen
  • For oral solution (Canada)
• Pseudoephedrine and Acetaminophen
  • Capsules (U.S.)
  • Tablets (U.S. and Canada)
• Pseudoephedrine and Ibuprofen
  • Tablets (U.S. and Canada)

Dextromethorphan ( dex-troe-meth-OR-fan) is used to relieve coughs due to colds or influenza (flu). It should not be used for chronic cough that occurs with smoking, asthma, or emphysema or when there is an unusually large amount of mucus or phlegm (flem) with the cough.

Dextromethorphan relieves cough by acting directly on the cough center in the brain.

This medicine is available without a prescription; however, your doctor may have special instructions on the proper use of this medicine for your medical condition. It is available in the following dosage forms:

Oral
• Lozenges (U.S.)
• Extended-release oral suspension (U.S. and Canada)
• Syrup (U.S. and Canada)

Diazoxide (dye-az-OX-ide) when taken by mouth is used in the treatment of hypoglycemia (low blood sugar). It works by preventing release of insulin from the pancreas.

Diazoxide is available only with your doctor's prescription, in the following dosage forms:

Oral
• Capsules (U.S. and Canada)
• Suspension (U.S. and Canada)

Difenoxin and atropine (dye-fen-OX-in and A-troe-peen ) combination medicine is used along with other measures to treat severe diarrhea in adults. Difenoxin helps stop diarrhea by slowing down the movements of the intestines.

Since difenoxin is chemically related to some narcotics, it may be habit-forming if taken in doses that are larger than prescribed. To help prevent possible abuse, atropine (an anticholinergic) has been added. If higher-than-normal doses of the combination are taken, the atropine will cause unpleasant effects, making it unlikely that such doses will be taken again.

Difenoxin and atropine combination medicine should not be used in children. Children with diarrhea should be given solutions of carbohydrates (sugars) and electrolytes (important salts) to replace the water and important salts that are lost from the body during diarrhea.

This medicine is available only with your doctor's prescription, in the following dosage form:

Oral
• Tablets (U.S.)

Dimethyl sulfoxide (dye-METH-il sul-FOX-ide ) is a purified preparation used in the bladder to relieve the symptoms of the bladder condition called interstitial cystitis. A catheter (tube) or syringe is used to put the solution into the bladder where it is allowed to remain for about 15 minutes. Then, the solution is expelled by urinating.

Interstitial cystitis is the only human use for dimethyl sulfoxide that is approved by the U.S. Food and Drug Administration (FDA).

Claims that dimethyl sulfoxide is effective for treating various types of arthritis, ulcers in scleroderma, muscle sprains and strains, bruises, infections of the skin, burns, wounds, and mental conditions have not been proven.

Although other preparations of dimethyl sulfoxide are available for industrial and veterinary (animal) use, they must not be used by humans, because of their unknown purity. Impurities in these preparations may cause serious unwanted effects in humans. Even if dimethyl sulfoxide is applied to the skin, it is absorbed into the body through the skin and mucous membranes.

This medicine is available only with your doctor's prescription, in the following dosage form:

Topical
• Bladder irrigation (U.S. and Canada)

Dinoprostone ( dye-noe-PROST-one) works by causing the cervix to thin and dilate (open) and the uterus to contract (cramp) the way it does during labor.

Dinoprostone may also be used for other purposes as determined by your doctor.

Dinoprostone is to be administered only by or under the immediate care of your doctor. It is available in the following dosage forms:

Cervical
• Gel (U.S. and Canada)

Vaginal
• Gel (Canada)
• Suppositories (U.S.)
• System (U.S.)

Diphenoxylate and atropine (dye-fen-OX-i-late and A-troe-peen) is a combination medicine used along with other measures to treat severe diarrhea in adults. Diphenoxylate helps stop diarrhea by slowing down the movements of the intestines.

Since diphenoxylate is chemically related to some narcotics, it may be habit-forming if taken in doses that are larger than prescribed. To help prevent possible abuse, atropine (an anticholinergic) has been added. If higher than normal doses of the combination are taken, the atropine will cause unpleasant effects, making it unlikely that such doses will be taken again.

Diphenoxylate and atropine combination medicine should not be used in children. Children with diarrhea should be given solutions of carbohydrates (sugars) and important salts (electrolytes) to replace the water, sugars, and important salts that are lost from the body during diarrhea. For more information on these solutions, see the Carbohydrates and Electrolytes (Systemic) monograph.

This medicine is available only with your doctor's prescription in the following dosage forms:

Oral
• Oral solution (U.S.)
• Tablets (U.S. and Canada)

Dipivefrin (dye-PI-ve-frin) is used to treat certain types of glaucoma.

This medicine is available only with your doctor's prescription, in the following dosage form:

Ophthalmic
• Ophthalmic solution (eye drops) (U.S. and Canada)

Loop diuretics are given to help reduce the amount of water in the body. They work by acting on the kidneys to increase the flow of urine.

Furosemide is also used to treat high blood pressure (hypertension) in those patients who are not helped by other medicines or in those patients who have kidney problems.

High blood pressure adds to the work load of the heart and arteries. If it continues for a long time, the heart and arteries may not function properly. This can damage the blood vessels of the brain, heart, and kidneys, resulting in a stroke, heart failure, or kidney failure. High blood pressure may also increase the risk of heart attacks. These problems may be less likely to occur if blood pressure is controlled.

Loop diuretics may also be used for other conditions as determined by your doctor.

This medicine is available only with your doctor's prescription, in the following dosage forms:

Oral
• Bumetanide
  • Tablets (U.S.)
• Ethacrynic Acid
  • Oral solution (U.S. and Canada)
  • Tablets (U.S. and Canada)
• Furosemide
  • Oral solution (U.S. and Canada)
  • Tablets (U.S. and Canada)

Parenteral
• Bumetanide
  • Injection (U.S.)
• Ethacrynic Acid
  • Injection (U.S. and Canada)
• Furosemide
  • Injection (U.S. and Canada)

This medicine is a combination of two diuretics (water pills). It is commonly used to help reduce the amount of water in the body.

This combination is also used to treat high blood pressure (hypertension). High blood pressure adds to the work load of the heart and arteries. If it continues for a long time, the heart and arteries may not function properly. This can damage the blood vessels of the brain, heart, and kidneys, resulting in a stroke, heart failure, or kidney failure. High blood pressure may also increase the risk of heart attacks. These problems may be less likely to occur if blood pressure is controlled.

Diuretics help to reduce the amount of water in the body by acting on the kidneys to increase the flow of urine. This also helps to lower blood pressure.

This combination is also used to treat problems caused by too little potassium in the body.

This medicine is available only with your doctor's prescription, in the following dosage forms:

Oral
• Amiloride and Hydrochlorothiazide
  • Tablets (U.S. and Canada)
• Spironolactone and Hydrochlorothiazide
  • Tablets (U.S. and Canada)
• Triamterene and Hydrochlorothiazide
  • Capsules (U.S.)
  • Tablets (U.S. and Canada)

Doxorubicin ( dox-oh-ROO-bi-sin) belongs to the general group of medicines known as antineoplastics. It is used to treat some kinds of cancers of the blood; lymph system; bladder; breast; stomach; lung; ovaries; thyroid; nerves; kidneys; bones; and soft tissues, including muscles and tendons. It may also be used to treat other kinds of cancer, as determined by your doctor.

Doxorubicin seems to interfere with the growth of cancer cells, which are then eventually destroyed by the body. Since the growth of normal body cells may also be affected by doxorubicin, other effects will also occur. Some of these may be serious and must be reported to your doctor. Other effects, like hair loss, may not be serious but may cause concern. Some effects may not occur until months or years after the medicine is used.

Before you begin treatment with doxorubicin, you and your doctor should talk about the good this medicine will do as well as the risks of using it.

Doxorubicin is to be administered only by or under the supervision of your doctor. It is available in the following dosage form:

Parenteral
• Injection (U.S. and Canada)

Disulfiram (dye-SUL-fi-ram) is used to help overcome your drinking problem. It is not a cure for alcoholism, but rather will discourage you from drinking.

Disulfiram is available only with your doctor's prescription, in the following dosage form:

Oral
• Tablets (U.S. and Canada)

Dipyridamole ( dye-peer-ID-a-mole) is used to lessen the chance of stroke or other serious medical problems that may occur when a blood vessel is blocked by blood clots. It is given only when there is a larger-than-usual chance that these problems may occur. For example, it is given to people who have had diseased heart valves replaced by mechanical valves, because dangerous blood clots are especially likely to occur in these patients. Dipyridamole works by helping to prevent dangerous blood clots from forming.

Dipyridamole may also be used for other heart and blood conditions as determined by your doctor.

Dipyridamole is also sometimes used as part of a medical test that shows how well blood is flowing to your heart. For information on this use of dipyridamole, see Dipyridamole-Diagnostic (Systemic).

Dipyridamole is available only with your doctor's prescription, in the following dosage forms:

Oral
• Tablets (U.S. and Canada)

Parenteral
• Injection (U.S. and Canada)

Dapiprazole ( da-PI-pray-zole) is used in the eye to reduce the size of the pupil after certain kinds of eye examinations.

Some eye examinations are best done when your pupil (the black center of the colored part of your eye) is very large, so the doctor can see into your eye better. This medicine helps to reduce the size of your pupil back to its normal size after the eye examination.

Dapiprazole is available in the following dosage form:

Ophthalmic
• Ophthalmic solution (eye drops) (U.S. and Canada)

Diloxanide (dye-LOKS-a-nide) is used to treat an infection called amebiasis, which is caused by protozoa (tiny, one-celled animals). It works by killing the protozoa.

Diloxanide is available only with your doctor's prescription in the following dosage form.

Oral
• Tablets (United Kingdom)

Dipyridamole (dye-peer-ID-a-mole ) is used as part of a medical test that shows how well blood is flowing to your heart. The test can show your doctor whether any of the blood vessels that bring blood to the heart are blocked or in danger of becoming blocked. Your doctor can then decide on the best treatment for you. Exercise (for example, walking on a treadmill) is usually used to give your doctor this information. Dipyridamole is used instead of exercise for people who are not able to exercise at all, or cannot exercise hard enough.

The dose of dipyridamole that is used to test how well blood is flowing to your heart will be different for different patients and depends on your body weight.

For information on other uses of dipyridamole, see Dipyridamole-Therapeutic (Systemic).

Dipyridamole is available only with your doctor's prescription, in the following dosage forms:

Oral
• Tablets (U.S. and Canada)

Parenteral
• Injection (U.S. and Canada)

Diphtheria and Tetanus Toxoids (also known as DT and Td) is a combination immunizing agent given by injection to prevent diphtheria and tetanus.

Diphtheria is a serious illness that can cause breathing difficulties, heart problems, nerve damage, pneumonia, and possibly death. The risk of serious complications and death is greatest in very young children and in the elderly.

Tetanus (also known as lockjaw) is a serious illness that causes convulsions (seizures) and severe muscle spasms that can be strong enough to cause bone fractures of the spine. Tetanus causes death in 30 to 40 percent of cases.

Immunization with diphtheria and tetanus toxoids for pediatric use (DT) is recommended for infants and children from 6 weeks of age (8 weeks in Canada) up until their 7th birthday.

Children 7 years of age and older and adults should be immunized with tetanus and diphtheria toxoids for adult use (Td). In addition, these children and adults should receive booster doses of Td every 10 years for the rest of their lives.

Diphtheria and tetanus are serious diseases that can cause life-threatening illnesses. Although some serious side effects can occur after a dose of DT or Td, these are rare. The chance of your child catching one of these diseases and being permanently injured or dying as a result is much greater than the chance of your child getting a serious side effect from the DT or Td vaccine.

DT and Td are available in the following dosage form:

Parenteral
• Injection (U.S. and Canada)

Dyphylline ( DYE-fi-lin) is used to treat and/or prevent the symptoms of bronchial asthma, chronic bronchitis, and emphysema. It works by opening up the bronchial tubes (air passages of the lungs) and increasing the flow of air through them.

This medicine is available only with your doctor's prescription, in the following dosage forms:

Oral
• Elixir (U.S.)
• Tablets (U.S.)

Parenteral
• Injection (U.S.)

Dirithromycin (dye-RITH-roe-mye-sin) is used to treat bacterial infections in many different parts of the body. It works by killing bacteria or preventing their growth. However, this medicine will not work for colds, flu, or other virus infections.

Dirithromycin is available only with your doctor's prescription, in the following dosage form:

Oral
• Tablets (U.S.)

Diphtheria and tetanus toxoids and pertussis (dif-THEER-ee-a and TET-n-us and per-TUSS-iss) vaccine (also known as DTP vaccine) combined with Haemophilus b conjugate (hem-OFF-fil-us BEE KON-ja-gat) vaccine (also known as Hib vaccine) is a combination immunizing agent used to prevent illness caused by diphtheria, tetanus, pertussis, and Haemophilus influenzae type b (Hib) bacteria. The vaccine works by causing the body to produce its own protection (antibodies) against these diseases. This combination vaccine is also known as DTP-Hib vaccine.

Diphtheria is a serious illness that can cause breathing difficulties, heart problems, nerve damage, pneumonia, and possibly death. The risk of serious complications and death is greater in very young children and in the elderly.

Tetanus (also known as lockjaw) is a serious illness that causes convulsions (seizures) and severe muscle spasms that can be strong enough to cause bone fractures of the spine. Tetanus causes death in 30 to 40 percent of cases.

Pertussis (also known as whooping cough) is a serious disease that causes severe spells of coughing that can interfere with breathing. Pertussis can also cause pneumonia, long-lasting bronchitis, seizures, brain damage, and death.

Infection by Haemophilus influenzae type b (Hib) bacteria can cause life-threatening illnesses, such as meningitis, which affects the brain; epiglottitis, which can cause death by suffocation; pericarditis, which affects the heart; pneumonia, which affects the lungs; and septic arthritis, which affects the bones and joints. Hib meningitis causes death in 5 to 10% of children who are infected. Also, approximately 30% of children who survive Hib meningitis are left with some type of serious permanent damage, such as mental retardation, deafness, epilepsy, or partial blindness.

DTP-Hib vaccine is available in the following dosage form:

Parenteral
• Injection (U.S. and Canada)

Diphtheria antitoxin ( dif-THEER-ee-a AN-ti-TOK-sin) is used to prevent and/or treat diphtheria infection in persons exposed to the disease.

Although rare in the U.S., diphtheria is a serious disease that can cause life-threatening illnesses. Diphtheria is transmitted through contact with an infected person or a carrier of the disease.

Diphtheria antitoxin is to be administered only by or under the supervision of your doctor or other health care professional. It is available in the following dosage form:

Parenteral
• Injection (Canada)

Dolasetron (dol-A-se-tron) is used to prevent and treat the nausea and vomiting that may occur after treatment with anticancer medicines (chemotherapy) or after surgery.

This medicine is available only with your doctor's prescription, in the following dosage forms:

Oral
• Tablets (U.S.)

Parenteral
• Injection (U.S.)

Droperidol ( droe-PER-i-dole) is used to reduce the amount of nausea and vomiting you may have after surgery or other procedures.

This medicine is available only with your doctor's prescription, in the following dosage form(s):

Parenteral
• Injection (U.S. and Canada)

Delavirdine ( de-la-VIR-deen) is used, in combination with other medicines, in the treatment of the infection caused by the human immunodeficiency virus (HIV). HIV is the virus that causes acquired immune deficiency syndrome (AIDS).

Delavirdine will not cure or prevent HIV infection or AIDS; however, it helps keep HIV from reproducing and appears to slow down the destruction of the immune system. This may help delay the development of problems usually related to AIDS or HIV disease. Delavirdine will not keep you from spreading HIV to other people. People who receive this medicine may continue to have other problems usually related to AIDS or HIV disease.

This medicine is available only with your doctor's prescription, in the following dosage form:

Oral
• Tablets (U.S.and Canada)

Liposomal doxorubicin (LIP-oh-som-al dox-oh-ROO-bi-sin) belongs to the general group of medicines known as antineoplastics. It is used to treat some kinds of cancer.

Liposomal doxorubicin seems to interfere with the growth of cancer cells, which are eventually destroyed. Since the growth of normal body cells may also be affected by liposomal doxorubicin, other effects will also occur. Some of these may be serious and must be reported to your doctor. Other effects, like hair loss, may not be serious but may cause concern. Some effects may not occur for months or years after the medicine is used.

Before you begin treatment with liposomal doxorubicin, you and your doctor should talk about the good this medicine will do as well as the risks of using it.

Liposomal doxorubicin is to be administered only by or under the immediate supervision of your doctor. It is available in the following dosage form:

Parenteral
• Injection (U.S. and Canada)

Dihydroergotamine ( dye-hye-droe-er-GOT-a-meen) belongs to the group of medicines called ergot alkaloids. It is a nasal solution used to help relieve migraine headaches. Nasal dihydroergotamine is not an ordinary pain reliever. It will not relieve any kind of pain other than throbbing headaches.

Nasal dihydroergotamine may cause blood vessels in the body to constrict (become narrower). This action can lead to serious effects that are caused by a decrease in the flow of blood (blood circulation) to many parts of the body. Be sure that you discuss with your doctor the risks of using this medicine as well as the good it can do.

This medicine is available only with your doctor's prescription, in the following dosage form(s):

Nasal
• Nasal solution (US)

Dexrazoxane ( dex-ray-ZOKS-ane) is used to help prevent or lessen a toxic effect to your heart that is caused by certain medicines that are used to treat cancer.

This medicine is available only with your doctor's prescription, in the following dosage form(s):

Parenteral
• Injection (U.S.)

Doxycycline ( dox-i-SYE-kleen) belongs to the group of medicines known as tetracyclines. Although tetracyclines are antibiotics that are usually used to treat some types of infections, this form of doxycycline is used to help treat periodontitis (a disease of the gums).

The exact way doxycycline works on the gums is not known, but may involve blocking the effect of an enzyme called collagenase.

This medicine is available only with your doctor's prescription, in the following dosage form:

Oral
• Tablets (U.S.)

Denileukin diftitox (DEN-i-loo-kin DIF-ti-toks) is used to treat cutaneous T-cell lymphoma, a rare type of cancer that affects certain white blood cells and causes lesions to develop on the skin.

Denileukin diftitox interferes with the growth of cancer cells, which are eventually destroyed. Since the growth of normal cells may also be affected by the medicine, other effects may also occur. Some of these may be serious and must be reported to your doctor. Some effects may occur after treatment with denileukin diftitox.

Denileukin diftitox is to be administered only by or under the supervision of your doctor or other health care professional. It is available in the following dosage form(s):

Parenteral
• Injection (U.S.)

Dipyridamole (dye-peer-ID-a-mole) and aspirin (AS-pir-in) is used to lessen the chance of stroke that may occur when a blood vessel in the brain is blocked by blood clots. It is given only when there is a larger-than-usual chance that these problems may occur. For example, it is given to people who have had a stroke, because dangerous blood clots are especially likely to occur in these patients. Dipyridamole and aspirin work by helping to prevent dangerous blood clots from forming.

This medicine is available only with your doctor's prescription, in the following dosage forms:

Oral
• Capsule (extended-release dipyridamole and immediate-release aspirin ) (U.S.and Canada)

Docosanol (doe-KOE-san-ole) belongs to the family of medicines called antivirals. Antivirals are used to treat infections caused by viruses. Usually they work for only one kind or group of virus infections.

Topical docosanol is used to treat the symptoms of herpes simplex virus infections around the mouth. Although topical docosanol will not cure herpes simplex, it may help relieve the pain and discomfort and may help the sores (if any) heal faster.

Docosanol is available over the counter in the following dosage form:

Topical
• Cream (U.S.)

Drospirenone and Ethinyl Estradiol (draw-SPEER-a-none and ETH-in-il es-tra-DYE-ole) This medicine is known also as the Pill, OCs, BCs, BC tablets, or birth control pills. This medicine usually contains two types of hormones, estrogens ( ES-troh-jenz ) and progestins (proh-JES-tins) and, when taken properly, prevents pregnancy. It works by stopping a woman's egg from fully developing each month. The egg can no longer accept a sperm and fertilization is prevented. Although oral contraceptives have other effects that help prevent a pregnancy from occurring, this is the main action.

This medicine is available only with your doctor's prescription, in the following dosage form:

Oral
• Drospirenone and Ethinyl Estradiol
  • Tablets (U.S.)

Drotrecogin alfa (droh-truh-KO-jin al-fa) is used to treat severe cases of sepsis, a life threatening infection in the blood. This medicine has been shown to reduce the risk of death in patients with severe sepsis who are at high risk of death. This medicine works by decreasing inflammation and the formation of blood clots in blood vessels.

This medicine is available only with your doctor's prescription, in the following dosage form:

Parenteral
• Injection (U.S.)

Desloratadine (des-LOR-at-a-deen) is an antihistamine. It is used to relieve the symptoms of hay fever and hives of the skin.

Antihistamines work by preventing the effects of a substance called histamine, which is produced by the body. Histamine can cause itching, sneezing, runny nose, and watery eyes. Also, in some persons histamine can close up the bronchial tubes (air passages of the lungs) and make breathing difficult. Histamine can also cause some persons to have hives, with severe itching of the skin.

This medicine is available only with your doctor's prescription, in the following dosage form:

Oral
• Syrup (U.S.)
• Tablets (U.S. and Canada)
• Oral disintegrating tablets (U.S.)

Diphtheria and tetanus toxoids and pertussis ( dif-THEER-ee-a and TET-niss and per-TUSS-is) vaccine (also known as DTP vaccine) combined with hepatitis B and poliovirus (hep-uh-TI-tis B and PO-lee-o-vi-rus) vaccine (also known as HepB and IPV) is a combination immunizing agent used to prevent illness caused by diphtheria, tetanus, pertussis, hepatitis B, and poliovirus. The vaccine works by causing the body to produce its own protection (antibodies) against these diseases.

This vaccine combines five agents into one vaccine. In order to complete the series, you must get three injections of this vaccine at separate intervals. Because there are many different diseases you will need to be vaccinated against, be sure to follow your doctor's directions about your vaccination schedule.

Diphtheria is a serious illness that can cause breathing difficulties, heart problems, nerve damage, pneumonia, and possibly death. The risk of serious complications is greater in very young children and the elderly.

Tetanus (also known as lockjaw) is a very serious illness that causes seizures and severe muscle spasms that can be strong enough to cause bone fractures of the spine. The disease continues to occur almost exclusively among people who do not get vaccinated or do not have enough protection from previous vaccines.

Pertussis (also known as whooping cough) is a serious disease that causes severe spells of coughing that can interfere with breathing. Pertussis can also cause pneumonia, long lasting bronchitis, seizures, brain damage, and death.

Hepatitis B infection is a major cause of serious liver diseases including liver cancer. You get hepatitis B by being exposed to someone else's body fluids. Pregnant women can also give hepatitis B to their unborn child. People who have the virus can give it to others without them knowing it.

Polio is a very serious infection that causes paralysis of the muscles, including the muscles that enable you to walk and breathe. A polio infection may leave a person unable to breathe without the help of a breathing machine. It may also leave a person unable to walk without leg braces or being confined to a wheelchair. There is no cure for polio.

This vaccine is available in the following dosage form:

Parenteral
• Injection (U.S. only)

Duloxetine (du-LOX-uh-teen ) is used to treat mental depression. It is also used for pain caused by nerve damage associated with diabetes.

Duloxetine belongs to a group of medicines known as selective serotonin and norepinephrine reuptake inhibitors (SSNRIs). These medicines are thought to work by increasing the activity of chemicals called serotonin and norepinephrine in the brain.

This medicine is available only with your doctor's prescription, in the following dosage forms:

Oral
• Delayed-release capsules (U.S.)