Known side effects of BENITOWA BETA 50 include Sleepiness Headache Ankle swelling Flushing (sense of warmth in the face, ears, neck and trunk) Slow heart rate Tiredness Palpitations Nausea Edema (swelling) Cold extremities Constipation. Not everyone experiences these side effects.
This is not an exhaustive list. Consult your doctor if you notice any unusual symptoms.