Thank you for your query.
At the outset let me inform you that all medicines have some or the other side effects and we have to weigh the benefit of the medicine against the problem and accordingly give the medicine. As your son has moderate to severe autism
then we need to ensure that his development is as normal as possible for which the side effects of the medicine has to be tolerated. I suggest that you work in close coordination with the treating doctor who shall monitor the dosage of the medicine depending on the response.
I hope I have answered your query to your satisfaction.
Wishing your son all the best.
Rajiv K Khandelwal