Common side effects may include headache, indigestion, back pain, muscle aches, flushing, and stuffy or runny nose. Serious side effects are rare but can include vision changes or sudden loss of vision, hearing loss, or prolonged erections lasting more than 4 hours.
Common side effects may include headache, indigestion, back pain, muscle aches, flushing, and stuffy or runny nose. Serious side effects are rare but can include vision changes or sudden loss of vision, hearing loss, or prolonged erections lasting more than 4 hours.