Common side effect of taking Terbinafine include: diarrhea, feeling full, headaches, stomach gas, digestion problems, stomach pain, and mild nausea. Contact your doctor if any of them persist or become bothersome.
Contact your doctor immediately if any of the following occurs: nausea, vomiting, increased tiredness, lack of appetite, jaundice, itching, dark-colored urine, clay-colored stools or abdominal pain. These symptoms may signify a beginning of liver damage.
If you experience any symptoms associated with allergies such as difficulty breathing, hives, swollen tongue or glands, tightness in the chest, etc., stop using the medication and seek urgent medical help.