<unk>  (trade name Avil among others) is an antihistamine with anticholinergic properties used to treat allergic conditions such as hay fever or urticaria. It has relatively strong sedative effects, and may sometimes be used off-label as an over-the-counter sleeping pill in a similar manner to other sedating antihistamines such as diphenhydramine.<unk>  is also commonly found in eyedrops used for the treatment of allergic conjunctivitis. It was patented in 1948.<unk>  is generally sold in combination with other medications, rather than as a stand-alone drug, although some formulations are available containing<unk>  by itself.
Pheniramine
Metergoline
Cabergoline
Phentermine
Propranolol
Nicergoline
Clonidine
Bupranolol