Phentolamine Mesylate Injection 5 mg Vial (RX)Phentolamine Mesylate Injection 5 mg is a medication used to treat conditions such as high blood pressure or erectile dysfunction. It works by blocking the action of certain chemicals in the body, which helps to relax blood vessels and increase blood flow. This medication is administered by injection and is often used in emergency situations for the treatment of dangerously high blood pressure or overdose of certain medications. It may also be used as