Possible carcinogen found in some Diabetes drugs: USFDA

Nitrosamines are common in water and foods, including cured and grilled meats, dairy products, and vegetables.

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USFDA
USFDA

Last Updated on October 10, 2024 by The Health Master

The US Food and Drug Administration (USFDA) said that certain samples of sitagliptin, a compound in Merck’s diabetes drugs Januvia and Janumet, were contaminated with a possible carcinogen.

The agency said it would temporarily allow Merck to distribute drugs with sitagliptin containing a higher than normally acceptable amount of the impurity Nitroso-STG-19, also known as NTTP, in order to avoid a shortage.

Merck said it notified authorities it had detected that some batches of the drugs contained the impurities and implemented additional quality controls to make sure its drugs will meet the interim acceptable limits.

“We remain confident in the safety, efficacy, and quality of our sitagliptin-containing medicines,” Merck said, noting that no significant impact on supply is expected.

Sales of Januvia and a related combination medicine called Janumet totaled $1.23 billion (S$1.7 billion) in the second quarter.

NTTP belongs to the nitrosamine class of compounds, some of which are classified as probable or possible human carcinogens, based on laboratory tests, the agency said.

Agency scientists evaluated the risk of exposure to NTTP at interim acceptable intake levels up to 246.7 nanograms per day and determined that it presents minimal additional cancer risk when compared to a lifetime of exposure to NTTP at the 37 nanograms per day level.

In recent years, some drugmakers have had to recall some batches of drugs like Pfizer’s anti-smoking treatment, Chantix, and stopped selling others like the heartburn treatment ranitidine, often sold under the brand name Zantac, due to the presence of nitrosamines.

Nitrosamines are common in water and foods, including cured and grilled meats, dairy products, and vegetables. Exposure to impurities above acceptable levels over long periods of time could increase the risk of cancer.

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