Vilitra (and other ED medications), was discovered by scientists at Pfizer, the American pharmaceutical company. Here’s the detailed context: Discovery: Sildenafil was initially developed in the late 1980s by Pfizer researchers in the UK. Original purpose: The drug was originally studied as a treatment for angina (chest pain due to heart disease) because it relaxed blood vessels and improved blood flow. Serendipitous effect: During clinical trials, researchers noticed that participants experienced improved erections as a side effect. Commercialization: This led Pfizer to repurpose sildenafil for erectile dysfunction, and it was marketed as Viagra starting in 1998. Vilitra is a brand version of sildenafil manufactured by Centurion Laboratories in India, so the active ingredient (sildenafil) remains the same, but the brand and formulation differ. The discovery itself is credited to Pfizer’s research team, not to the Vilitra brand or Centurion Laboratories.