Propranolol HCl for Injection 1 mg/mL Single-Dose Vials 1 mL is a medicinal product containing the active ingredient propranolol hydrochloride, which is a beta-blocker that is used to treat a variety of medical conditions including high blood pressure, heart rhythm disorders, chest pain (angina), and migraines. It is available in single-dose vials for injection, with each vial containing 1 mL of the medication at a concentration of 1 mg per mL. This form of propranolol is typically given in a hospital or clinical setting by a healthcare professional.

Propranolol HCl for Injection 1 mg works by blocking the effects of beta-adrenergic receptors in the body. These receptors are responsible for responding to the hormone adrenaline, also known as epinephrine, which is released during times of stress or physical activity.

By blocking these receptors, propranolol reduces the effects of adrenaline on the body. This leads to a decrease in heart rate, blood pressure, and the force of heart contractions. This can help to relieve symptoms of conditions such as high blood pressure, angina, and irregular heart rhythms.

Propranolol also has effects on the nervous system that may help to control anxiety and prevent migraines. It is also sometimes used to prevent bleeding episodes in people with certain types of liver disease.

In summary, propranolol HCl for Injection 1 mg works by blocking the effects of adrenaline in the body, leading to a decrease in heart rate, blood pressure, and symptoms of various medical conditions.