Doxepin (Silenor) is used to treat insomnia (difficulty falling asleep or staying asleep) in people who have trouble staying asleep. Doxepin (Silenor) is in a class of medications called tricyclic antidepressants. It works by slowing activity in the brain to allow sleep.
Doxepin is also available as a capsule and liquid to treat depression and anxiety. This monograph only gives information about doxepin (Silenor) for insomnia. If you are using this medication for depression or anxiety, read the monograph entitled doxepin (depression, anxiety).
Doxepin (Silenor) comes as a tablet to take by mouth. It is usually taken once a day, within 30 minutes of bedtime. Do not take doxepin (Silenor) within 3 hours of a meal. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take doxepin (Silenor) exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.
You will probably become very sleepy soon after you take doxepin (Silenor) and will remain sleepy for some time after you take the medication. Plan to go to bed right after you take doxepin (Silenor) and to stay in bed for 7 to 8 hours. Do not take doxepin (Silenor) if you will be unable to go to bed right away and remain asleep for 7 to 8 hours after taking the medication.
You should begin to sleep better during the first few days of treatment with doxepin (Silenor). If your sleep does not improve within 7-10 days, or gets worse call your doctor.
Your doctor or pharmacist will give you the manufacturer's patient information sheet (Medication Guide) when you begin treatment with doxepin (Silenor) and each time you refill your prescription. Read the information carefully and ask your doctor or pharmacist if you have any questions. You can also visit the Food and Drug Administration (FDA) website ( Web Site) to obtain the Medication Guide.
This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.
Before taking doxepin (Silenor),
Unless your doctor tells you otherwise, continue your normal diet.
Doxepin (Silenor) should only be taken at bedtime. If you did not take doxepin (Silenor) before you went to bed and you are having trouble sleeping, you may take doxepin (Silenor) if you will be able to stay in bed for at least 7 to 8 hours afterward. Do not take a double dose of doxepin (Silenor) to make up for a missed dose.
Doxepin (Silenor) may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
Doxepin (Silenor) may cause other side effects. Call your doctor if you have any unusual problems while 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 ( Web Site ) or by phone (1-800-332-1088).
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 light, and excess heat and moisture (not in the bathroom).
Unneeded medications should be disposed of in special ways to ensure that pets, children, and other people cannot consume them. However, you should not flush this medication down the toilet. Instead, the best way to dispose of your medication is through a medicine take-back program. Talk to your pharmacist or contact your local garbage/recycling department to learn about take-back programs in your community. See the FDA's Safe Disposal of Medicines website ( Web Site) for more information if you do not have access to a take-back program.
It is important to keep all medication out of sight and reach of children as many containers (such as weekly pill minders and those for eye drops, creams, patches, and inhalers) are not child-resistant and young children can open them easily. To protect young children from poisoning, always lock safety caps and immediately place the medication in a safe location – one that is up and away and out of their sight and reach. Web Site
In case of overdose, call the poison control helpline at 1-800-222-1222. Information is also available online at Web Site. If the victim has collapsed, had a seizure, has trouble breathing, or can't be awakened, immediately call emergency services at 911.
Symptoms of overdose may include:
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.
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.
AHFS® Consumer Medication Information. © Copyright, The American Society of Health-System Pharmacists, Inc., 7272 Wisconsin Avenue, Bethesda, Maryland. All Rights Reserved. Duplication for commercial use must be authorized by ASHP.
Selected Revisions: May 24, 2017.