My Son Has Been On Suboxone For Heroin Addiction .

My son has been on suboxone for heroin addiction . He has been clean for 5 months, he usually smoked it int the past ,to my knowledge has never injected it. This morning he came home out late and I think may have skin popped heroin. He has pinpoint pupils and difficult to arouse. He is sleeping . He has not taken his tablet of suboxone this am , can I give It to him if he does have heroin in his suystem?