PROPRANOLOL HYDROCHLORIDE SOLUTION [ATLANTIC BIOLOGICALS CORP.] Propranolol Hydrochloride Oral Solution is available for oral administration containing either 20 mg per 5 mL or 40 mg per 5 mL of propranolol hydrochloride USP. The oral solution contains the following inactive ingredients: citric acid anhydrous, crème de menthe flavor, disodium edetate, methyl paraben, propylene glycol, propylparaben, purified water, saccharin sodium, sorbitol solution and strawberry flavor.