<unk>  is a respiratory stimulant that is FDA approved for the treatment of Postanesthesia, Drug-Induced Central Nervous System Depression and Chronic Pulmonary Disease Associated with Acute Hypercapnia.   Common adverse reactions include flushing, pruritus, diarrhea, nausea, vomiting.
Doxapram
Avacopan
Alvimopan
Tofisopam
Magaldrate
Opipramol
Clonidine
Iopromide