Please consult your physician before taking any medication. Generic Name: terbinafine (ter BIN na feen) Lamisil (terbinafine) is an antifungal antibiotic. Lamisil is used to treat infections caused by fungus that affect the fingernails or toenails. Lamisil oral granules are used to treat a fungal infection of scalp hair follicles in children who are at least 4 years old. Take Lamisil for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared. Skipping doses may also increase your risk of further infection that is resistant to antibiotics. Lamisil will not treat a viral infection such as the common cold or flu. Some people taking this medicine have developed severe liver damage leading to liver transplant or death. It is not clear whether Lamisil actually caused the liver damage in these patients. In most cases, the patient had a serious medical condition before taking Lamisil.