The following methods can treat pyrexia: Medications: The medications should be used at the exact doses as recommended by the physician as higher doses may damage the liver or kidney. Antibiotics: These drugs are recommended if the doctor suspects that the fever is caused by some bacterial infections in the bladder or bowel. Antiviral drugs: These medicines are used if the doctors diagnose that the fever is caused by viral infections. Rest: The patient should take adequate rest. Fluids: Adequate fluids along with regular supplements should be taken to prevent dehydration.