The effect comes on within about 5 to 10 minutes. 100mg is usually enough to enter a K-hole. If liquid is injected into the muscle, less is needed to enter a K-hole. Effects can be felt within four minutes. If swallowed, the effects come on in 10 - 20 minutes.
Some people become nauseous after taking ketamine.
An ecstasy testing kit can be used to screen against fake ecstasy tablets.