Upon ingesting CBD capsules, the body takes steps to release the effects of the capsule. You should feel the effects in approximately 60 minutes. This timing is due to the ‘first-pass effect’, as the capsules must first pass through the digestive system. The effects of the capsules then last for 4-6 hours. On the other hand, CBD oil that is taken sublingually is absorbed by the body within 20-40 minutes, and the effects last for 4-6 hours. The main difference lays in preference, and ease of dosing which may be important for some.