<unk> (topical) is an alpha adrenergic agonist that is FDA approved for the treatment of facial erythema of rosacea.   Common adverse reactions include erythema, flushing, skin burning sensation, and contact dermatitis.
Brimonidine 
Clonidine
Metergoline
Phenylephrine 
Penbutolol
Bietaserpine
Avacopan
Clopamide