Trepiline is a trade name for the antidepressant Amitriptyline, which can indeed help relieve anxiety. Many people find, especially in the first couple of weeks, than it can make them feel drowsy, so it's usually best to take it at bedtime, when that side-effect will be convenient rather than a nuisance. If at first one still feels drowsy in the early morning, one would take it a bit earlier in the evening.
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