India, the world's main supplier of generic drugs, has restricted the export of 26 pharmaceutical ingredients and the medicines made from them, including Paracetamol, a common pain reliever also sold as acetaminophen, as the coronavirus outbreak plays havoc with supply chains.

The Indian government urged calm and said there were enough stocks to manufacture formulations for two-to-three months.

The government's list of 26 active pharmaceutical ingredients (APIs) and medicines accounts for 10% of all Indian pharmaceutical exports and includes several antibiotics, such as tinidazole and erythromycin, the hormone progesterone and Vitamin B12.

It was unclear how the restriction would impact the availability of these medicines in the countries that import from India and also depend on China. In the United States, for instance, Indian imports accounted for 24 percent of medicines and 31 percent of medicine ingredients in 2018, according to the U.S. Food and Drug Administration.

FDA Commissioner Stephen Hahn told U.S. senators on Tuesday that the agency is working to determine how the restrictions will affect the U.S. medical supply and the effect on essential medicines.

The FDA last week announced the first coronavirus-related drug shortage in the United States but declined to name the drug in question. Hahn said on Tuesday that the drug was in shortage because of a lack of materials needed to make the API.

Indian drugmakers rely on China, the source of the virus outbreak, for almost 70% of the APIs for their medicines. Industry experts say they are likely to face shortages if the epidemic drags on.