C Guan 100mg Tablet is an antiparasitic medicine, used for the treatment of malaria. It works by killing the malaria causing parasite and stops the infection from spreading. C Guan 100mg Tablet should be used in the dose and duration as advised by your doctor. Take it with food to decrease the risk of stomach upset. Do not skip any doses and finish the full course of treatment even if you feel better. Common side effects of this medicine include diarrhea, oral ulcers, headache, abdominal pain, cough, vomiting, nausea, weakness, weight loss, dizziness, and itching. Consult your doctor if these side effects persist for a longer duration. Inform your doctor if you ever had fits (seizures) or have any problems with your kidney, heart, or liver.