Possible Side Effects Propranolol
Check with your doctor if any of these most common side effects persist or become bothersome: * constipation; diarrhea; dizziness; drowsiness; fatigue; lightheadedness; mild pain, swelling, or redness at the injection site; nausea; stomach upset or cramping; trouble sleeping; vomiting; weakness. Seek medical attention right away if any of these severe side effects occur: * severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); chest pain; disorientation; fever with aching and sore throat; hallucinations; memory loss; mental or mood changes; numbness or tingling of the hands; persistent or severe vision changes; red, swollen, blistered or peeling skin; severe dizziness; shortness of breath or wheezing; sudden unusual weight gain; swelling of the hands, ankles, or feet, unusual bruising; unusually slow heartbeat; very cold or blue fingers or toes.

Drug Class and Mechanism Propranolol
Propranolol is a beta-blocker. It works by decreasing the action of pacemaker cells and slowing certain impulses in the heart. This helps to control irregular heartbeat.

More InformationPropranolol here
Propranolol is to be used only by the patient for whom it is prescribed. Do not share it with other people. If your symptoms do not improve or if they become worse, check with your doctor.