Pfizer can show the FDA approval to the Indian regulator and present a case that based on whatever data submitted, the US regulator has granted a full marketing nod, says Sohini Das.
More than 200 million Pfizer doses have been administered in the US, and hundreds of millions more worldwide, since December.
The Johnson and Johnson vaccine, which works with one dose instead of two, got approval on Saturday, the third vaccine cleared in the country after emergency use authorisation (EUA) was given to two-dose shots from Pfizer and Moderna in December last year.
The first drug to treat low sexual desire in premenopausal women, dubbed "female Viagra", has been approved in the United States, but with a warning about potentially dangerous side effects such as severe low blood pressure and fainting.