T-break (Tolerance break)

A "tolerance break" or "T-break" is a user-initiated period of abstinence intended to reverse tolerance and restore sensitivity to THC's subjective and therapeutic effects. The term is vernacular and under-studied in peer-reviewed literature, though its rationale rests on reversibility of CB1 desensitization and downregulation. Hirvonen et al. (2012) showed in chronic daily smokers that ~20% cortical CB1R downregulation returned to control levels after ~4 weeks continuously monitored abstinence. D'Souza et al. (2016 Biol Psychiatry Cogn Neurosci Neuroimaging) using [¹¹C]OMAR PET found CB1R availability began recovering within 2 days of abstinence and was not significantly different from controls at 28 days. These data anchor the typical 2–4 week T-break recommendation, though individual variability is high. Cognitive recovery meta-analyses (Scott 2018) show neurocognitive deficits largely resolve within days to several weeks. ⚠️ No RCT defines optimal T-break length; peer-reviewed literature does not use the term "T-break" directly. Citations: Hirvonen J et al. Mol Psychiatry. 2012;17:642-649; D'Souza DC et al. Biol Psychiatry Cogn Neurosci Neuroimaging. 2016;1:60-67; Scott JC et al. JAMA Psychiatry. 2018;75:585-595.