title: AR-A000002
text: # AR-A000002
  
  AR-A000002 is a drug which is one of the first compounds developed to act as a selective antagonist for the serotonin receptor $5-HT_{1B},$ with approximately 10x selectivity for $5-HT_{1B}$ over the closely related $5-HT_{1D}$ receptor. It has been shown to produce sustained increases in levels of serotonin in the brain, and has anxiolytic effects in animal studies.
  
  