My son is 17years old and has been taking sigular for 5 years due...

My son is 17years old and has been taking sigular for 5 years due to allergies and a minor asthma condition, I am also seeing many of the side effects. The major ones are explosive anger, easy frustrations, laziness/lack of motivation, leg pains and cramps in legs, and when he sleeps it is almost impossible to wake him up in the AM. He mumbles and says OK I will get up , then after 15-30 mins and he is still in bed and constant attention by me to wake him, he finally wakes up and says, why has no one tried to help get me up and he is very anger. He has raised in bed, screaming, and punched at me during these 15-30mins, to later say, NO way I didn't do that, I don't remember. He seems to be in a trance!. I have been struggling to figure this out for 2 years now, I do agree that I saw an easy going kid turn into one filled with anger and frustrations for no real reasons.