Were your samples THC plus CBD? From what I understand the SUBLINGUAL (tinctures) take 10-15 min for initial effects; 30-60 min for maximum effects and last 2-4 hours. Salves last 45-60 minutes; vaporization lasts 2-4 hours. INGESTION (ie: Capsules) take 60-90 minutes for initial effects and 2-3 hours for maximum effects with the duration of effects being 6-12 hours. It tends to be an individual process to find what works for you. More is not always better... your dispensary should be able to help you.