Nytol (Diphenhydramine Hydrochloride)
Diphenhydramine Hydrochloride Information
(dye fen hye' dra meen)
Before using diphenhydramine injection,
- tell your doctor and pharmacist if you are allergic to diphenhydramine, other antihistamine medications including dimenhydrinate (Dramamine), any other medications, or any of the ingredients in diphenhydramine injection. Ask your pharmacist for a list of the ingredients.
- tell your doctor and pharmacist what other prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take. Be sure to mention the following: monoamine oxidase (MAO) inhibitors such as isocarboxazid (Marplan), phenelzine (Nardil), selegiline (Eldepryl, Emsam, Zelapar), and tranylcypromine (Parnate); muscle relaxants; sedatives; sleeping pills; and tranquilizers.
- tell your doctor if you are breastfeeding. Your doctor will probably tell you not to use diphenhydramine injection if you are breastfeeding because of the risk of harm to infants.
- tell your doctor if you have or have ever had asthma or other types of lung disease; glaucoma (a condition in which increased pressure in the eye can lead to gradual loss of vision); ulcers; prostatic hypertrophy (enlargement of the prostate gland) or difficulty urinating (due to an enlarged prostate gland); heart disease; high blood pressure; or hyperthyroidism (a condition where the thyroid gland produces too much thyroid hormone).
- tell your doctor if you are pregnant or plan to become pregnant. If you become pregnant while using diphenhydramine injection, call your doctor.
- you should know that diphenhydramine injection may make you drowsy. Do not drive a car or operate machinery until you know how this medication affects you.
- ask your doctor about the safe use of alcoholic beverages while you are using diphenhydramine injection. Alcohol can make the side effects from diphenhydramine injection worse.
- excitement (especially in children)
- difficulty falling asleep or staying asleep
- vision changes
- stomach discomfort
- difficulty urinating
- change in urinary frequency
- ringing in the ears
- dry mouth, nose, or throat
- problems with coordination
- uncontrollable shaking of a part of the body
- chest tightness