What side effect can you get from taking gris-peg?

Gris peg (griseofulvin) side effect. Common side effects are mild. Diarrhea, dizziness, headache, nausea, stomach upset, tiredness and vomiting serious side effect when you need to seek medical attention right away. Severe allergic reaction, like rash hives, itching, difficulty in breathing, tightness in chest, swelling of face or mouth, face, lips or tongue, butterfly shaped rash on face, confusion, fever and chills, red swollen blisters, dark urine.