The inspection, along with adherence to current Good Manufacturing Practices (cGMP), is critical because outside US, India has the highest number of pharma manufacturing plants approved by the watchdog, it said in a report here.
A majority of ratings that Crisil has assigned to pharmaceuticals companies have not been affected due to this intense scrutiny of the US regulator.
Crisil has ratings on 283 pharmaceutical companies, 55 per cent of which have international presence. Of this, 10 per cent have faced action from the US FDA or other regulators in the developed markets.
However, ratings on more than 80 per cent of them have remained unchanged, Crisil added.
More From This Section
"Companies with multiple plants and sufficient spare capacity have been able to offset revenue loss through site transfers. Also, a geographically diversified presence and strong financial metrics are helping cushion the impact of the fall in operating profitability because of regulatory action on their credit profiles.
Since January 2010, there have been 65 regulatory actions -- such as issuance of warning letters and import alerts -- on domestic pharmaceutical plants. Almost 46 per cent of these were of high-intensity, meaning import alerts were issued straightaway, without being preceded by a warning.
Two out of three FDA actions initiated worldwide in 2015 were on Indian drug makers, and in 2016 so far, every third has been against a local firm.
"India's pharmaceutical industry has to strengthen its systems and controls to address regulatory issues effectively. It also needs to enhance its capabilities in managing data, processes and compliance to avert future scrutiny.