<unk> (oral) is an alpha-1 adrenergic receptor agonist that is FDA approved for the treatment of temporarily relieves sinus congestion and pressure, temporarily relieves nasal congestion due to the common cold, hay fever or other upper respiratory allergies.   Common adverse reactions include nausea, vomiting, headache, and nervousness.
Phenylephrine 
Methylergonovine 
Prazosin
Terazosin
Doxazosin
Trimazosin
Oxymetazoline
Tramazoline