Bloomberg Businessweek Reviews Valsartan Contamination
A lengthy Bloomberg Businessweek report looks at the ongoing issue of N- nitrosodimethylamine (NDMA) contamination in the widely-used hypertension medicine valsartan. The contamination led FDA in 7/2018 to oversee a recall of drugs from three companies. There have been 51 additional recalls since then, including two additional drugs, irbesartan and losartan, made by at least 10 companies.
Bloomberg says that while FDA has a rigorous approval process for new drugs, companies manufacturing generic drugs only have to show that patients will absorb them at the same rate as the branded medications they mimic.
“At least 80% of the active pharmaceutical ingredients for all drugs are made in Chinese and Indian factories that U.S. pharmaceutical companies never have to identify to patients, using raw materials whose sources the pharmaceutical companies don’t know much about,” the story says. “FDA checks less than 1% of drugs for impurities or potency before letting them into the country. Surveillance inspections of oversea factories have declined since 2016, even as the agency is under pressure to get more generics to market quickly. Where FDA’s drug approval process is founded on testing and more testing, the regulatory system for generics is built on trust, specifically trust in manufacturers.”