You shouldn’t drive, use machinery, or do other activities that require alertness after taking this drug until you know how it affects you.Some of the more common side effects that can occur with use of doxepin include:If these effects are mild, they may go away within a few days or a couple of weeks. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.In Canada - Call your doctor for medical advice about side effects. Initial dose: 75 mg orally once a day. The target symptoms of psychoneurosis that respond particularly well to doxepin hydrochloride capsules include anxiety, tension, depression, somatic symptoms and concerns, sleep disturbances, guilt, lack of energy, fear, apprehension and worry Clinical experience has shown that doxepin is safe and well tolerated even in the elderly patient. If dose exceeds 150 mg/day, divide q12hr. Talk to your doctor about other drug options that may work for you.© 2005-2020 Healthline Media a Red Ventures Company. Do not increase your dose or use this drug more often or for longer than prescribed. Examples of these drugs include:Taking doxepin with certain drugs used to treat heart rhythm problems can increase your risk of dangerous heart rhythm problems. Use Older adults may be more sensitive to the side effects of this drug, especially Some products that may interact with this drug include: arbutamine, Tell your doctor or pharmacist if you are taking other products that cause drowsiness such as If someone has overdosed and has serious symptoms such as passing out or If you miss a dose, take it as soon as you remember. Your dosage, drug form, and how often you take the drug will depend on:It isn’t known if doxepin is safe and effective for children younger than 18 years.The liver and kidneys of older adults may not work as well as they used to. Doxepin is a prescription drug. Maintenance dose: 75 to 150 mg orally once a day or in divided doses; patients with very mild disease may be adequately controlled with 25 to 50 mg per day. It has a mild to moderate benefit for sleeping problems. “This drug doxepin has definitely decreased my anxiety and panic attacks. However, it may take up to 3 weeks before you feel the full effect.Tell your doctor if your condition persists or worsens (such as your feelings of sadness get worse, or you have thoughts of Tell your doctor right away if any of these rare but serious side effects occur: persistent Get medical help right away if you have any very serious side effects, including: severe dizziness, fast/irregular heartbeat, This is not a complete list of possible side effects. Doxepin is also available as a tablet to treat insomnia. Serious side effects and their symptoms can include the following:Doxepin oral capsule can interact with other medications, vitamins, or herbs you may be taking. This can help keep levels of this drug from building up too much in your body.Doxepin oral capsule is used for short- or long-term treatment. As a result, a higher amount of a drug stays in your body for a longer time. Taken for 6 months to 1 year June 8, 2019. Doxepin is a medication used to treat major depressive disorder, anxiety disorders, chronic hives, and trouble sleeping. All rights reserved. Some may be better suited for you than others. Do not stop taking this medication without consulting your doctor. This medication is used to treat mental/mood problems such as depression and anxiety. Usual Adult Dose for Anxiety. Doxepin is used to treat depression and anxiety. It’s only available as a generic drug. The dose of this medicine will be different for different patients. It is often used in insomnia. You and your doctor should monitor certain health issues. To help you remember, take it at the same time(s) each day.