Study: Abruptly Stopping CBD Use Has No Physical Side-Effects

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Study: Abruptly Stopping CBD Use Has No Physical Side-Effects

According to a new study published in the journal Epilepsy & Behavior, abruptly stopping the use of CBD (cannabidiol) is not associated with physical withdrawal symptoms. The study is titled Abrupt withdrawal of cannabidiol (CBD): A randomized trial.

For the study researchers examined the occurrence of withdrawal symptoms induced by the abrupt cessation of CBD, reports NORML. Subjects in the trial were healthy volunteers who ingested 750mg of plant-derived CBD twice daily for a period of four weeks. Study participants either continued to receive CBD or received a placebo during weeks five and six. Researchers reported no serious adverse events resulting from the discontinuation of CBD.

They found that “In healthy volunteers, no evidence of withdrawal syndrome was found with abrupt discontinuation of short-term treatment with CBD.”


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As noted by NORML, in 2018, federal regulators classified Epidiolex – an FDA-approved formulation of plant-derived CBD – as a Schedule V substance, the lowest restriction classification available under federal law.

The study’s full abstract is listed below:

Rationale

The rationale of this study was to assess occurrence of withdrawal symptoms induced by abrupt cessation of cannabidiol (CBD) after prolonged administration in healthy volunteers.

Methods

Thirty volunteers were randomized to receive 750 mg of a plant-derived pharmaceutical formulation of highly purified CBD in oral solution (100 mg/mL; Epidiolex® in the United States and Epidyolex® in Europe) twice daily (b.i.d.) for 4 weeks (Part 1) followed by 2 weeks of 750 mg b.i.d. CBD (Part 2, Arm 1) or matched placebo (Part 2, Arm 2). All volunteers completed the Cannabis Withdrawal Scale (CWS) and the 20-item Penn Physician Withdrawal Checklist (PWC-20) on days − 1, 21, 28, 31, 35, 42, and at follow-up.

Results

Median CWS and PWC-20 scores slightly decreased from Part 1 to Part 2. Median CWS scores ranged from 0.0 to 4.0 (out of a possible 190) in Arm 1 and 0.0 to 0.5 in Arm 2. Median PWC-20 scores were 0.0 (out of a possible 60) in both arms. Twenty-nine (97%) volunteers in Part 1 reported all-causality treatment-emergent adverse events (AEs); the most commonly reported was diarrhea (63%). In Part 2, Arm 1, 6 (67%) volunteers reported all-causality AEs; the most commonly reported was diarrhea (44%). In Part 2, Arm 2, 9 (75%) volunteers reported all-causality AEs; the most commonly reported was headache (58%). Nine volunteers withdrew because of AEs in Part 1; 1 withdrew in Part 2, Arm 2, because of an AE that began in Part 1. Four severe AEs were reported in Part 1; the remainder were mild or moderate. No serious AEs were reported.

Conclusion

In healthy volunteers, no evidence of withdrawal syndrome was found with abrupt discontinuation of short-term treatment with CBD.

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