'Female Viagra' is now officially for sale

Addyi, the drug many call "female Viagra," went on sale Saturday, NBC News reports. The FDA rejected Addyi twice — in 2010 and 2013 — before controversially issuing approval to the drug earlier this year.

Flibanserin, as it's known generically, will be prescribed to women to take once daily. Critics have argued the risks associated with the drug's side effects, like low blood pressure and dizziness, can be dangerous, and that the drug hasn't been tested extensively enough. They also say the so-called libido drug may not even be particularly effective for women looking to increase their sex drives.

The FDA has strongly warned women to not to take any alcohol while on the medication, since the interaction may cause sudden fainting.