Ammonium chloride irritates the stomach lining slightly, which reflexly increases the watery secretions in the airway and makes phlegm easier to bring up.
Chlorpheniramine blocks histamine receptors and readily enters the brain, which is why it dries secretions well but also causes drowsiness. It is a standard ingredient of cold combinations.
Most side effects are mild and settle as your body adjusts. Tell your doctor if any of them persist or trouble you.
24 brands with the same salt and strength — same form first, then cheapest. Pack size and form can still differ, and the same salt does not suit every patient. Please confirm with our pharmacist before switching.