Health care advocates and members of Congress expressed opposition to the cuts after being told of them earlier this week.

The Department of Health and Human Services is reinstating $2 billion in funds to address substance abuse and mental health after the department said it would cancel funds the day before, an administration official confirmed to NBC News.

The reinstatement came Wednesday after groups were informed Tuesday of the funding cuts, which were associated with the Substance Abuse and Mental Health Services Administration.

Rep. Rosa DeLauro, the top Democrat on the House Appropriations Committee, attributed the reversal to Health Secretary Robert F. Kennedy Jr. having “bowed to public pressure.”

“These are cuts he should not have issued in the first place,” she said in a statement. “He must be cautious when making decisions that will impact Americans’ health. Our policy must be thoughtful — not haphazard and chaotic. This episode has only created uncertainty and confusion for families and healthcare providers.”