Amitriptyline hydrochloride (Elavil^®) is a prescription drug licensed to treat depression. The drug is part of a class of medicines called tricyclic antidepressants. Besides treating depression, amitriptyline is also used "off-label" to treat a number of other conditions, including bulimia, fibromyalgia, bedwetting, and ADHD. Side effects of amitriptyline can include confusion, a dry mouth, drowsiness, and constipation. Among the conditions you should let your healthcare provider know about before taking amitriptyline are diabetes, glaucoma, problems passing urine, and hyperthyroidism (overactive thyroid). You should also let your healthcare provider know, prior to taking amitriptyline, if you drink alcohol regularly or are nursing, pregnant, or about to undergo surgery. There are six available strengths of amitriptyline, ranging from 10 mg to 150 mg. Amitriptyline tablets should be taken at the same time each day to maintain even levels of the drug in your blood. If you happen to overdose on amitriptyline, seek medical attention immediately. Symptoms of an amitriptyline overdose can include seizures, sleeplessness or fainting, dilated (wide open) pupils, and seeing things that are not really there (hallucinations).