Many people are labelled as allergic to penicillin, causing a useful class of antibiotics to be avoided for no good reason.

Smith, 55, is further impacted by mastocytosis, a rare condition where the body makes too many mast cells. Mast cells are a ...

A pilot on an Iberia flight from Düsseldorf to Madrid suffered an allergic reaction after being bitten mid-flight by a ...

Connecticut Rep. John Larson abruptly stopped talking while he was on the floor of the House of Representatives in Washington ...

Larson froze and stopped talking for about 25 seconds while delivering a speech in what his office said was a reaction to a ...

This afternoon, he had what was likely an adverse reaction to a new medication and is having tests administered by the House Attending Physician out of an abundance of caution," Larson’s office ...

John Larson abruptly stopped talking while he was on the floor of the House of Representatives in Washington, D.C., with his office reportedly saying he had an "adverse reaction" to new medication.