<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
Is it safe to mix heroin with fentanyl?
<|assistant|>
No, it is not safe to mix heroin with fentanyl, as the combination can produce dangerous and unpredictable results. When heroin and fentanyl are mixed, the effects can be amplified, leading to increased potential for overdose.