"A psychoactive dose of THC increases internal clock speed as indicated by time overestimation and underproduction. This effect is not dose-related, and is blun

"A psychoactive dose of THC increases internal clock speed as indicated by time overestimation and underproduction. This effect is not dose-related, and is blunted in chronic cannabis smokers, who did not otherwise have altered baseline time perception." This is consistent with simply being dropped in an unfamiliar environment and slowly adapting to it. We call them "trips" for a reason. A new drug is a foreign country. For pot a chronic stoner is a local. You could get similar overestimation and underproduction by jetting them to a place full of strange people, languages and customs.