Experts warn that despite the first antiviral pills for COVID-19 promising protection for those at risk of severe disease, Pfizer's or Merck's new medications may not be safe for everyone, NBC News reported over the weekend.

One of the two drugs in Pfizer's Paxlovid antiviral cocktail could cause severe or life-threatening interactions with commonly used medications, including statins, blood thinners and some antidepressants, and the FDA does not recommend Paxlovid for those with severe kidney or liver disease.

As the omicron surge pummels a pandemic-weary nation, the first antiviral pills for Covid-19 promise desperately needed protection for people at risk of severe disease. However, many people prescribed Pfizer’s or Merck’s new medications will require careful monitoring by doctors and pharmacists, and the antivirals may not be safe for everyone, experts caution.

The Food and Drug Administration (FDA) recently authorized two antiviral pills, one from Pfizer and one from Merck, making them the first at-home treatment for COVID-19 that has been touted as a game changer in the fight against the pandemic.

However, experts told NBC News that the pills will require careful monitoring by doctors and pharmacists.