Dear concerned., Thanks for writing to us. The history does not tell us about the type of treatment given to your son s # clavicle.Was it Closed Manipulative Reduction with 8 shaped bandage? Was it done under GA(General Anaesthesia). Was the medicine prescribed by Ortho Surgeon? Codiene is a narcotic analgesic that is it acts on the Central Nervous System inducing sedation and reduces pain thereby.It is very much habit forming and has to be taken under supervision .The side effects are Constipation (This has to be counteracted by consuming more of fibre diet and drinking lot of water).If your child is an asthmatic/having infective bronchitis codeine is contraindicated as it suppresses caugh and may increase the collection of Sputum/Phlegm in the lungs and lead to worsening of respiratory condition.There may be episodes os Obstructive Sleep Apnoea.Do you refer this to night terrors? If so kindly change the medication in consultation with your MD. You are also requested to go for regular follow up with your orthopedic surgeon for Clavicular Fracture treatment. In addition advise your son to move his fingers/wristjoint/elbow minimally regularly to prevent freezing. Wishing you a speedy recovery., Best Regards., Dr Lt Cdr ASN Bhushan., Ex-navy.