Known side effects of Newtel Beta 25 include Headache Weakness Dizziness Cold extremities Slow heart rate Increased potassium level in blood Numbness of extremity Decreased blood pressure. Not everyone experiences these side effects.
Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated August 2026
This is not an exhaustive list. Consult your doctor if you notice any unusual symptoms.