Do not take your dose twice. If you notice other effects not listed above, contact your doctor or pharmacist. We are not responsible for any direct, indirect, special or other indirect damage as a result of any use of the information on this site and also for consequences of self-treatment. 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. Avoid cutting, crushing or chewing this medicine. If you take it only once a day, take it at bedtime to reduce daytime sleepiness.