Few side effects. The most common side effect to aspercreme would be local skin irritation. There is always chance for a systemic reaction but that would be rare. Overall apercreme should be safe.
ASPERCREME REACTIONS. Aspercreme is used for aches and pains. Some of the side effects can be a rash, itching, swelling of the tongue or mouth, or tightness in chest. If these occur stop immediately and see your doctor.