Read the Medication Guide provided by your pharmacist before you start taking doxepin and each time you get a refill. Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). As this medicament can be absorbed by skin, women who are pregnant or may become pregnant should not manipulate this medicine. It may help improve mood and feelings of well-being, relieve anxiety and tension, help you sleep better, and increase your energy level. Before taking doxepin, tell your doctor or pharmacist if you are allergic to it; or to other tricyclic antidepressants (such as nortriptyline); or if you have any other allergies.