The office of Rep. John Larson, D-Conn., said Monday that an “adverse reaction” to new medication led to the congressman freezing for nearly a minute during a speech on the House floor.

Larson, 76, is the ranking member of the Ways & Means Subcommittee on Social Security. He was giving a 5-minute speech on concerns about Social Security and privacy when he stopped talking and froze.

“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. He later participated in multiple meetings in his office and was alert and engaged. The Congressman remains in touch with his staff and in good spirits,” read a press release from Larson’s staff.

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