Drug Uses Endep is used to treat symptoms of depression. Endep may also be used for purposes other than those listed in this medication guide. How to use Take Endep exactly as it was prescribed for you. Do not take Endep in larger amounts, or take it for longer than recommended by your doctor. Your doctor may occasionally change your dose to make sure you get the best results from this medication. Follow the directions on your prescription label. Drug Class and Mechanism Endep is in a group of drugs called tricyclic antidepressants. Endep affects chemicals in the brain that may become unbalanced. Missed Dose If you miss a dose of this medicine and you are using it regularly, take it as soon as possible. If you do not remember until later, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once. Storage Store at the room temperature away from moisture and sunlight. Keep out of the reach of children.