Side effects cannot be anticipated and are almost always unexpected. If any problems occur or change in intensity, contact your doctor immediately. Only your doctor can determine if it is safe to continue using Cialis.
Common side effects may include: Headache, nausea, indigestion, flushing, pain in the abdominal area, heartburn, vision changes, itching, rash, dizziness, trouble breathing. Muscle aches and back pain can occur in 12 - 24 hours, but these symptoms usually disappear after 48 hours.
This is not a complete list of all side affects. Should you have any questions about all possible side effects, consult with your doctor before taking Cialis. And, should any new symptom of which you were not previously aware of occur, please contact your doctor immediately.