October 2026
Cannabidiol COVID-19 outcomes
StudyImprovementRR · 95% CIOutcomeTreatmentControlRelative Risk
Crippa (DB RCT)−557%6.57 · 0.35–124hosp.3/490/42
Crippa (DB RCT)−33%1.33 · 0.86–2.08recov. time49 (n)42 (n)
Kuntzman (DB RCT)77%0.23 · 0.01–4.49death0/71/3
Kuntzman (DB RCT)57%0.43 · 0.04–4.82ICU1/71/3
Kuntzman (DB RCT)22%0.78 · 0.30–2.01hosp. time7 (n)3 (n)
McNamara (DB RCT)80%0.20 · 0.01–4.05death0/452/45
Nguyen50%0.50 · 0.31–0.82cases26/53148/531
Nguyen33%0.67 · 0.49–0.91cases75/1,212108/1,212
Huang−181%2.81 · 1.04–7.58death13,099 (all patients)
Huang19%0.81 · 0.73–0.90cases13,099 (all patients)
Merianos−212%3.12 · 1.87–4.97symp. case94/41620/384
Merianos−71%1.71 · 1.13–2.49symp. case77/41638/384
Merianos−3%1.03 · 0.96–1.09cases367/416317/384
Lehrer−24%1.24 · 1.05–1.45casesn/an/a
Shover (PSM)2%0.98 · 0.94–1.04death3/69199/1,762
Shover (PSM)5%0.95 · 0.91–0.99ventilation3/69292/1,762
Shover (PSM)9%0.91 · 0.85–0.99ICU8/69543/1,762
Shover3%0.97 · 0.92–1.02oxygen35/691,417/1,762
Mannumbet.. (PSM)56%0.44 · 0.35–0.56death
Mannumbet.. (PSM)25%0.75 · 0.70–0.81ventilation
Mannumbet.. (PSM)−6%1.06 · 1.02–1.10hosp. time
Griffith3%0.97 · 0.82–1.14death
Griffith−27%1.27 · 1.14–1.41ICU
Griffith−80%1.80 · 1.68–1.93hosp.
Milad−101%2.01 · 1.37–2.94cases74/55436/541
Milad−19%1.19 · 1.08–1.31cases374/554307/541
Torrejón-Guirado−154%2.54 · 1.47–4.12cases22/15667/895
Torrejón-Guirado−51%1.51 · 0.65–3.22cases22/16467/887
Torrejón-Guirado−35%1.35 · 0.84–2.11cases39/38250/669
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