Cannabis Capsules – THC – 20mg Capsules. Cannabis Capsules are made with decarboxylated plant material and are standardized using extracted cannabis oil. The production of cannabis capsules requires a minimum of 3 analytical tests to ensure consistent active content. Typically, cannabis capsules are used to maintain longer periods of active medication in the body; i.e. overnight use. Cannabis Capsules should never be taken on an empty stomach. A great way to medicate without smoking. Exact dosage 20 mg per capsule.