A Senate committee on Wednesday approved legislation that would ban “gag clauses” that prevent pharmacists from telling a consumer it is cheaper to buy a drug out of pocket than through their insurance.

The Senate Health, Education, Labor and Pensions Committee unanimously advanced four healthcare bills, setting them up for a Senate floor vote. One of the bills is the Patient’s Right to Know Drug Prices Act, which targets a “gag clause” inserted by insurers and drug middlemen into contracts with pharmacies.