Symptoms such as stomach pain, a burning sensation in the abdomen, poor sleep, and reduced appetite after taking Candipoz-GR 300 Tablet may be side effects of Posaconazole. Still, they can also come from other causes, such as gastric irritation or an unrelated stomach problem, so the doctor will check whether the medicine is responsible or if there is an underlying issue, and then decide whether to continue, adjust, or change the treatment.