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Table 3 Mandated types of warnings compared to the types of warnings recommended by cannabis experts and types of warnings receommended by a group of cannabis users

From: Government-mandated warnings on cannabis legally sold for recreational use

Type of mandated warning

Number of U.S. states mandating 2020

Expert recommended 2013a

User recommended 2016b

Negative physical and mental health

6

yes

yes

Harm to youths or fetuses

5

yes

no

Risks related to driving or operating machinery

6

yes

yes

Risks of habit formation leading to overuse

4

yes

yes

Risks relating to over-use relating to single use

3

no

no

Greater risks for adolescents and youths

0

yes

yes

Secondary smoke is harmful

0

no

no

Risk of lasting effects from one use

0

no

no

Risks of cannabis topicals

0

no

no

  1. The users also suggested recommending responsible use. Canada mandates all nine types of warnings listed in the table
  2. aMalouff et al., 2013. b Malouff et al. (2016)