For medical guidance on side effects, contact your doctor. Typical negative effects may include: Effects of dimenhydrinate (more information) If you experience hives, breathing difficulties, swelling of your face, lips, tongue, or throat, you should seek emergency medical attention. In older adults, it may be more likely to experience side effects like dry mouth, constipation, and confusion. If you have: Stop using dimenhydrinate and contact your physician right away. This is not a complete list of side effects and others may occur. Contact the FDA at 1-800-FDA-1088 to report side effects. drowsiness, a dry mouth, throat, or nose; constipation; blurred vision; or, in children especially, a restless or excited feeling. A seizure (convulsions), little to no urination, confusion, mood swings, tremors, restlessness, or a rapid or irregular heartbeat are all signs to watch out for.
Skip the alcohol.
If you have phenylketonuria (PKU), an inherited condition requiring a special diet be followed to prevent damage to your brain that could cause severe intellectual disability, read the package label carefully before taking dimenhydrinate. Alcohol can make the side effects from dimenhydrinate worse. Consult your doctor and pharmacist regarding any prescription and over-the-counter drugs, vitamins, nutritional supplements, and herbal products you are currently taking or intend to take. Mention any of the following: aminoglycoside antibiotics such as amikacin (Amikin), gentamicin (Garamycin), kanamycin (Kantrex), neomycin (Neo-Rx, Neo-Fradin), netilmicin (Netromycin), paromomycin (Humatin), streptomycin, and tobramycin (Tobi, Nebcin); antidepressants such as amitriptyline If you are allergic to any of the ingredients in the dimenhydrinate preparation, other medications, or dimenhydrinate, tell your doctor and pharmacist before taking dimenhydrinate. If you are 65 years of age or older, discuss the advantages and disadvantages of taking dimenhydrinate with your doctor. Dimenhydrinate chewable tablets contain aspartame, which produces phenylalanine. Avoid alcoholic beverages or products containing alcohol while taking dimenhydrinate. Before determining how this medication affects you, do not operate heavy machinery, drive a car, or engage in other potentially risky activities. Ask your doctor if you are allergic to tartrazine (FD&C Yellow No. 5, a color additive) or aspirin if you are taking chewable dimenhydrinate tablets. Diamnhydrinate can cause drowsiness, so you should inform your doctor if you become pregnant while taking it. If you are having surgery, including dental surgery, you should let the doctor or dentist know that you are taking dimenhydrinate. Dimenhydrinate should generally not be taken by older adults because it is less reliable and less efficient than other drugs that can be used to treat the same condition. Consult your doctor if you experience any of the following symptoms: difficulty urinating due to enlargement of the prostate (male reproductive organ); shortness of breath; difficulty breathing, including chronic bronchitis (swelling of the air passages that lead to the lungs) or emphysema (damage to air sacs in the lungs); difficulty breathing, including chronic bronchitis (swelling of the air passages that lead to the lungs); glau