To answer your question, no it does not. If you do heroin and get drug tested you will come up positive for opiate use. But it will not block any other drug from being detected.
HEROINE
like drugs
Probably, as you do on most Drugs.
When you 'Use heroine with a silver spoon', you put the heroine in a spoon and then light a lighter underneath the spoon, heating the heroine until you breath in the fumes. DON'T DO DRUGS.
Cholonergic antagonists or anticholonergic drugs
Heroine
nerves drugs increase or decrease or block chemical neurotransmitters effects according by physician diagnose
She took heroine and coke believe
Marijuana,cocaine,ecstacy,heroine
The DXM, wich is in hard drugs such as heroine and meth.
Myth Crack Dust Shrooms Acid Weed Heroine Downers
Hank Williams used morphine and heroine