Hi,
Welcome on the forum,Even if you start Asunra with the lowest dose of 20mg/kg,for your son's weight it comes to 270 mg,so you are giving him a very small dose,you should increase his dose gradually,like start giving him 20 mg/kg i.e 270 mg for 2 weeks,then if he tolerates it well,switch him to 25 mg/kg ,and then finally to 30mg/kg i.e 405 mg,i know Asunra is available in 400 and 100 mg tabs,so your son's final dose would be a tab of 400 mg daily.Then hopefullu you'll see good results.
Zaini.