The duration of the effects varies depending on many factors, such as the potency of the substance in the concentrate and your tolerance level.
Generally, you can expect the effects to last anywhere from 1 to 3 hours after dabbing. The final product of concentrated forms of cannabis tends to have high potency and THC levels, and even a small dab can seem like a high dose for some. Always start with a small amount of the substance to see how you feel before taking another dab.