We often are asked about how long it takes to feel the effects of cannabis products given the different routes of administration.
Here is a primary source answering these questions:
been used in a few studies and are of little relevance in practice today. The pharmacoldnetics of THC vary as a function of its route of administration. Pulmonary assimilation of inhaled THC causes a maximum plasma concentration within minutes, psychotropic effects start within seconds to a few Min.., reach a maximum after 1.5-3o minutes, and taper off within 2-3 hours. Following oral ingestion, psychotropic effects set in with a delay of 30-90 minutes, reach their maximum after a-3 hours and last for about 4,2 hours, depending on dose and specific effect
