6 reasons to be cautious with medical cannabis

Physicians say the drug seems to hold some promise, but much more evidence is needed

While medical cannabis is promoted for conditions ranging from nausea to cancer, the paucity of high-quality evidence demands caution, according to six doctors across the US.

The editors of the Annals of Internal Medicine issued a call for readers' perspectives on prescribing or recommending marijuana. Six of the 100 submitted manuscripts for brief commentaries appear in the 8 January issue.

Here's a summary of the doctors' views: 

  1. Lack of evidence and standardisation
    Dr Chester Good from UPMC Health Plan, Pittsburgh, Pennsylvania, and colleagues lament the lack of high-quality evidence and the lack of standardisation of medical marijuana products. “Medical marijuana seems to hold some promise for treating pain, but much more evidence is needed,”