Doxylamine, an antihistamine, is used in the short-term treatment of insomnia. Doxylamine also is used, in combination with decongestants, to relieve cough and cold symptoms.
Doxylamine comes as a tablet to take by mouth. Doxylamine has a quick acting sedative and sleep-inducing effect. The dose of doxylamine recommended for adults is 1 tablet (25 mg.) given 30 minutes before going to bed. For young people less than 18 years of age consult your doctor.
For cold symptoms, doxylamine usually is taken every 4-6 hours. Take doxylamine exactly as directed. Do not take more or less doxylamine or take it more often than prescribed by your doctor. Do not give doxylamine to a child younger than 12 years of age unless directed to do so by a doctor.
Doxylamine may cause an upset stomach. Take doxylamine with food or milk.
If you miss a dose, take it as soon as remembered if it is within an hour or so. If you do not remember until later, skip the missed dose and resume your usual dosing schedule. Do not "double-up" the dose to catch up.
Before taking doxylamine, tell your doctor if you are allergic to doxylamine or any other drugs.
Tell your doctor what prescription and nonprescription medications you are taking, especially medications for colds, hay fever, or allergies, muscle relaxants, pain medications, sedatives, sleep medications, tranquilizers and vitamins.
Do not take doxylamine if you have taken an MAO inhibitor or tranylcypromine in the last 2 weeks.
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 doxylamine, call your doctor.
If you are having surgery, including dental surgery, tell the doctor or dentist that you are taking doxylamine.
Doxylamine may make you drowsy. Do not drive a car or operate machinery until you know how doxylamine affects you. Alcohol can add to the drowsiness caused by doxylamine.
Possible side effects
Although side effects from doxylamine are not common, they can occur. Tell your doctor if this symptom is severe or does not go away: dry mouth, nose and throat.
If you experience any of the following symptoms from doxylamine, call your doctor immediately: vision problems, difficulty urinating, muscle weakness, excitement, nervousness.
Overdose of doxylamine may give the following symptoms: dry mouth,
dilated and fixed pupils, flushing, stomach upsets, sleeplessness, nervousness, over excitement, irritability, tremors, nightmares, hallucinations, fits, fast heartbeat, coma, heart attack, stopping breathing.
If overdose of doxylamine is suspected, contact your local poison control center or emergency room immediately.
Keep doxylamine in a tightly closed container and out of reach of children. Store doxylamine at room temperature and away from excess heat and moisture (not in the bathroom).
The above information is intended to supplement, not substitute for, the expertise and judgment of your physician, or other healthcare professional. It should not be construed to indicate that use of doxylamine is safe, appropriate, or effective for you.
Consult your health care professional before you