The U.S. FDA approved Merck & Co. Inc.’s Keytruda Qlex (pembrolizumab and berahyaluronidase alfa-pmph) injection on Sept. 19, making it the first and only subcutaneously (SC)-administered immune ...
After receiving an injection, some people experience symptoms at the injection site on the skin. This reaction is a common adverse effect of vaccines, Botox injections, biologics, and chemotherapy.
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