Doxepin is a tricyclic antidepressant.

Doxepin capsules and oral concentrate (liquid) are used to treat symptoms of depression and/or anxiety associated with alcoholism, manic depression, or other mental illness.

Doxepin tablets (Silenor) are used to treat insomnia in people who have trouble staying asleep.

This medication guide provides only information about doxepin capsules and liquid.

Doxepin may also be used for purposes not listed in this medication guide.

You should not use doxepin capsules or liquid if you are allergic to doxepin or similar medicines such as amoxapine or loxapine, or if you have:

• glaucoma; or
• urination problems.

Do not use doxepin if you have used an MAO inhibitor in the past 14 days. A dangerous drug interaction could occur. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, rasagiline, selegiline, tranylcypromine, and others.

Tell your doctor if you have used an "SSRI" antidepressant in the past 5 weeks, such as citalopram, escitalopram, fluoxetine (Prozac), fluvoxamine, paroxetine, sertraline (Zoloft), trazodone, or vilazodone.

Tell your doctor if you have ever had:

• bipolar disorder (manic-depression).

Some young people have thoughts about suicide when first taking an antidepressant. Your doctor should check your progress at regular visits. Your family or other caregivers should also be alert to changes in your mood or symptoms.

Tell your doctor if you are pregnant or breastfeeding.

Doxepin is not approved for use by anyone younger than 12 years old.

Use Sinequan (Oral) exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.

Get emergency medical help if you have signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Report any new or worsening symptoms to your doctor, such as: mood or behavior changes, anxiety, panic attacks, trouble sleeping, or if you feel impulsive, irritable, agitated, hostile, aggressive, restless, hyperactive (mentally or physically), more depressed, or have thoughts about suicide or hurting yourself.

Call your doctor at once if you have:

• blurred vision, tunnel vision, eye pain or swelling, seeing halos around lights;
• a light-headed feeling, like you might pass out;
• tremors, restless muscle movements in your eyes, tongue, jaw, or neck;
• severe constipation;
• confusion, hallucinations, unusual thoughts, seizure (convulsions); or
• painful or difficult urination.

Common side effects may include:

• drowsiness, dizziness;
• increased blood pressure;
• vision changes;
• rash, swelling;
• nausea, vomiting, indigestion;
• little or no urination;
• dry mouth, constipation; or
• decreased or increased sex drive.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Do not drink alcohol. Dangerous side effects or death could occur.

Avoid driving or hazardous activity until you know how this medicine will affect you. Your reactions could be impaired.