Back to Top. âOral/Injectable: Common side effects include headache, tiredness, nausea, anorexia, and vomiting. Common side effects in children include fever, cough, and digestive disorders. This is not a complete list of this medicationâs side effects.Ask your doctor or pharmacist for more information.ack to Top. âOral/Injectable: Common side effects include headache, tiredness, nausea, anorexia, and vomiting. Common side effects in children include fever, cough, and digestive disorders. This is not a complete list of this medicationâs side effects.