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Doxylamine

(dox il' a meen)

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Why is this medication prescribed?   Return to top

Doxylamine is used in the short-term treatment of insomnia (difficulty falling asleep or staying asleep). Doxylamine is also used in combination with decongestants and other medications to relieve sneezing, runny nose, and nasal congestion caused by the common cold. Doxylamine should not be used to treat children younger than 12 years of age. Doxylamine is in a class of medications called antihistamines. It works by blocking the action of histamine, a substance in the body that causes allergic symptoms.

How should this medicine be used?   Return to top

Doxylamine comes as a tablet to take by mouth for sleep, and in combination with other medications as a liquid to treat symptoms of the common cold. When doxylamine is used to reduce difficulty falling asleep, it usually is taken 30 minutes before bedtime. When doxylamine is used to treat cold symptoms, it is usually taken every 4-6 hours. Follow the directions on the package label or on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take doxylamine exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor or directed on the package label.

Doxylamine comes in combination with other cough and cold medications. Ask your doctor or pharmacist for advice on which product is best for your symptoms. Check nonprescription cough and cold product labels carefully before using two or more products at the same time. These products may contain the same active ingredient(s) and taking them together could cause you to receive an overdose.

If you are taking doxylamine to treat insomnia, you will probably become very sleepy soon after you take the medication and will remain sleepy for some time after you take the medication. Plan to remain asleep for 7-8 hours after taking the medication. If you get up too soon after taking doxylamine, you may be drowsy.

Doxylamine should only be used to treat insomnia for a short time. Call your doctor if you feel that you need to take doxylamine for longer than 2 weeks.

Cough and cold symptoms that get worse or that do not go away may be signs of a more serious condition. If you are taking doxylamine in combination with other medications to treat cough and cold symptoms, call your doctor if your symptoms worsen or if they last longer than 7 days.

If you are using the liquid, do not use a household spoon to measure your dose. Use the measuring cup or spoon that came with the medication or use a spoon that is made especially for measuring medication.

Other uses for this medicine   Return to top

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

What special precautions should I follow?   Return to top

Before taking doxylamine,

What special dietary instructions should I follow?   Return to top

Unless your doctor tells you otherwise, continue your normal diet.

What should I do if I forget a dose?   Return to top

Doxylamine is usually taken as needed. If your doctor has told you to take doxylamine regularly, 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?   Return to top

Doxylamine may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

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

Doxylamine may cause other side effects. Call your doctor if you have any unusual problems while you are taking this medication.

If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online [at http://www.fda.gov/MedWatch/index.html] or by phone [1-800-332-1088].

What storage conditions are needed for this medicine?   Return to top

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   Return to top

In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.

What other information should I know?   Return to top

Ask your pharmacist any questions you have about doxylamine .

It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.

Brand names   Return to top

  • Nighttime Sleep Aid® Tablets
  • Unisom® SleepTabs

Last Revised - 03/01/2008
Last Reviewed - 08/01/2007


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