(Reuters) – The U.S. Food and Drug Administration has approved a new formulation of Merck’s blockbuster cancer therapy Keytruda that can be administered under the skin, offering a more convenient option of the widely used cancer immunotherapy, the health regulator said on Friday.

The new version, branded as Keytruda Qlex, marks a major shift in how one of the world’s best-selling cancer drugs is administered, giving a faster alternative to the traditional intravenous method and shortening the time patients spend receiving the cancer immunotherapy.

The under-the-skin version cuts down time to be administered in one minute if dosed every three weeks or in two minutes if dosed every six weeks, said Nancy Ibach, associate vice president of US Oncology at Merck, compared to about 30 minutes f

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