Can I register my trademark to use on cannabis and other regulated products?

Applications for trademarks used on regulated products (e.g. cannabis, drug paraphernalia, ivory, whalebone) and activities (e.g. gambling and wagering, retail stores featuring controlled substances) are subject to additional review. The USPTO may inquire about your compliance with federal law before issuing a registration. If your goods, services, or trademark violate federal law, we will issue a refusal. 

SOURCE: USPTO.GOV