The common side effects of Lamisil, also known as terbinafine, include fever, chills, cough, headache and diarrhea, according to Mayo Clinic. Other side effects include body aches or pains, loss of appetite, nasal congestion, joint pain, and sore throat. These side effects require immediate medical attention when they occur.
Other side effects of Lamisil that do not necessarily require medical attention include stomach pain or acid with an unpleasant aftertaste, stuffy nose, belching, heartburn and toothache, states Mayo Clinic. These side effects often disappear as the body adapts to the medication. Lamisil is an antifungal medicine used in the treatment of fungus infection of the body, scalp, feet, groin, toenails and fingernails.