Generic name: Diphenhydramine Oral

	Brand	Generic	Manufacturer	Size	Price	Exp.
	Benadryl 25mg	Diphenhydramine hydrochloride	Pfizer	100 caps	US$55
	Benadryl 25mg	Diphenhydramine hydrochloride	Pfizer	50 caps	US$29
	Benadryl 50 mg	Diphenhydramine hydrochloride	various	100 tabs	US$37
	Benadryl 50 mg	Diphenhydramine hydrochloride	various	200 tabs	US$69

Why is this medication prescribed?
Diphenhydramine, an antihistamine, relieves red, irritated, itchy, watery eyes; sneezing; and runny nose caused by hay fever, allergies, and the common cold. It also may relieve the itching of insect bites, sunburns, bee stings, poison ivy, poison oak, and minor skin irritation. Diphenhydramine also is used to prevent and treat motion sickness, induce sleep, treat Parkinson's disease, and relieve cough caused by minor throat or airway irritation.

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

How should this medicine be used?
Diphenhydramine comes as a tablet, capsule, and liquid to take by mouth. It usually is taken three or four times a day. For motion sickness, diphenhydramine is taken 30 minutes before departure and, if needed, before meals and at bedtime. Diphenhydramine is taken at bedtime for sleep. Follow the directions on the package or on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take diphenhydramine exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.

Do not give diphenhydramine to a child younger than 6 years of age unless directed to do so by a doctor.

What special precautions should I follow?
Before taking diphenhydramine,

• tell your doctor and pharmacist if you are allergic to diphenhydramine or any other drugs.
• tell your doctor and pharmacist what prescription and nonprescription medications you are taking, especially other medications for colds, hay fever, or allergies; medications for depression or seizures; muscle relaxants; narcotics (pain medications); sedatives; sleeping pills; tranquilizers; and vitamins.
• tell your doctor if you have or have ever had asthma, lung disease, glaucoma, ulcers, difficulty urinating (due to an enlarged prostate gland), heart disease, high blood pressure, seizures, or an overactive thyroid gland.
• tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking diphenhydramine, call your doctor.
• if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking diphenhydramine.
• you should know that this drug may make you drowsy. Do not drive a car or operate machinery until you know how this drug affects you.
• remember that alcohol can add to the drowsiness caused by this drug.

What should I do if I forget a dose?
Take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.

What side effects can this medication cause?
Although side effects from diphenhydramine are not common, they can occur. Tell your doctor if any of these symptoms are severe or do not go away:

• dry mouth, nose, and throat
• drowsiness
• upset stomach
• chest congestion
• headache

If you experience any of the following symptoms, call your doctor immediately:

• vision problems
• difficulty urinating
• muscle weakness
• excitement (especially in children)
• nervousness

What storage conditions are needed for this medicine?
Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication.

In case of emergency/overdose
In case of overdose, call your local poison controlcenter at 1-800-222-1222. If the victim has collapsedor is not breathing, call local emergency services at911.

What other information should I know?
Keep all appointments with your doctor.

Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.