Hi, Thanks for writing in to hcm. I understand your problem and will try my best to help you out. During fever, the body white blood cells fight against the antigens and thus leading to increase in body temperature. After this phase the weating starts as a normal body mechanism to bring down the body temperature and thus even shivering occurs. Panadol consists of acetaminophen which acts as an antipyretic and analgesic hence used in treating fever. Donot worry make him take lots of fluids and medications . The fever will be controlled. Since your husband is on amoxycillin for prolonged period kindly consult your doctor if higher antibiotics need to be given if the infection is not getting cured with this. Hope this answered your query. Get well soon. Dr.Riyanka