Lamisil and other topical medicines provide effective treatment for mild to moderate toenail fungus and help to prevent infections from returning. Severe and hard-to-treat infections, however are best treated with oral anti-fungal pills.
Lamisil is a topical skin medication used to treat infections caused by fungus, according to drugs.com. It often comes in the form of a cream and may be applied directly to the affected area and may be purchased over the counter without a script. Side effects include headache, vomiting, diarrhea, nausea, upset stomach, stuffy or runny nose, cough and temporary change or loss of taste, according to WebMD.