Cannabis edibles are foods infused with the active ingredients in cannabis, THC and CBD. You should exercise caution when consuming edibles, because they can take far longer until onset of effects are felt, leading to people eating more edibles out of impatience. Wait two hours after eating any cannabis edibles before increasing your dose. If you over-ingest THC, the standard course of treatment is rest and hydration. Symptoms like dizziness, confusion, dysphoria and nausea should subside within a few hours.