Atazanavir is a Proteases Inhibitor (PI) that was approved in 2003. It is usually prescribed along with ritonavir or cobicistat. Generally well tolerated with few side effects. Take once or twice a day with food. It is considered safe for use during pregnancy.
Inform your doctor if you have Hepatitis-C. It should not be used with sildenafil (VIAGRA) and should not be taken directly with grapefruit juice.