Smoking Cannabis to counteract heroin?

[Help-Seeker]

Hey there,

Im new to this forum, and after reading a lot of these posts, I find
that everybody is very helpful, so I am hoping you guys can help me on
my question. My uncle has been a heroin addict for 5 years now, and he
is trying hard to get off this stuff. He tells me, that when he tries
to discontinue heroin, he cannot sleep and he has total insomnia. I
believe this is due to the heroin/alcohol depressant acting on behalf?
I am planning to suggest to him that he smoke Cannabis to counter-act
the terrible insomnia experienced on behalf on the withdrawal symptoms
of heron. As far as I know, Cannabis helps people get sedated when they
have trouble sleeping at night. If you don't agree that Cannabis is the
job for this, what will help him counter-act the terrible insomnia
experienced by heroin withdrawal symptoms?

Thanks for your help all, I really want to help my uncle

Dexter