Umhlaza uyingulo eyoyikekayo enelishwa liphuhliswe ngabantu abangama-40% ngexesha elithile ebomini babo. Iza ngendlela ezininzi ezahlukileyo yaye ineziphumo ezininzi ezahlukeneyo. Abantu abanomhlaza badla ngokuba ziintlungu kuzo zombini ezi zifo kwanolunyango abalwenzile.
Lo gama i-cannabis ayilunyango lomhlaza, abantu abaninzi bayafumanisa ukuba le nto inceda ukudambisa ezinye iintlungu zabo. I-Cannabis idla ngokusetyenziswa ukudambisa iintlungu ngoko ke inganceda abaphathwa sisifo somhlaza ngale ndlela. Zininzi ezinye izinto zenkanunu ezinokukunceda. Umzekelo, abantu abaphantsi konyango lokubulala iintsholongwane badla ngokulahlekelwa kukutya kwabo. I-Cannabis inokukhuthazeka okuhle kakhulu kokutya. Kweli phepha uza kufumana uluhlu olugqityiweyo lwe cannabis loxinzelelo olunokunceda kwiziphumo ebezingalindelekangaunomhlaza nonyango lwawo.