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. 2019 Dec 14;20:174. doi: 10.1186/s12875-019-1059-8

Table 2.

Top 10 adverse effects – THC (n = 72 respondents) & CBD (n = 31 respondents)

THC CBD
Rank Adverse effect % of Respondents Adverse effect % of Respondents
1 Fatigue, sedation 65.3 Fatigue, sedation 67.7
2 Anxiety 63.9 Other 45.2
3 Dry mouth and eyes 54.2 Headache 22.6
4 Dizziness 52.8 Anxiety 16.1
5 Appetite stimulation 37.5 Dizziness 12.9
6 Impaired concentration 36.1 Dry mouth and eyes 12.9
7 Dysphoria 34.7 Impaired concentration 12.9
8 Impaired memory 31.9 Nausea, vomiting 12.9
9 Tachycardia, heart palpitations 29.2 Tachycardia, heart palpitations 9.7
10 Altered sense of time 26.4 Appetite stimulation 6.5

*This is a multiple response variable (i.e., Check all that apply). Percent of respondents, not responses. Does not sum to 100%