Cannabis can affect everyone differently.  Products come in different forms, and each form has a particular time to onset and duration of effect.  If you're a new consumer, or are trying a new type of product, start with a low dose (1/2 breath inhale, 2.5 - 5mg of edible) and wait to feel the extent of the effects for the right amount of time (5 mins for inhale, up to 2 hrs for edible) before you decide to dose a little more.

Requiring higher doses to feel the same effect from a product over time can be a sign of developing dependence or addiction. Try to make it a point to take time off from consuming every now and then, unless you rely on cannabis medicinally.  Adding CBD to your experiences in a 1:1 ratio with THC can also slow down the tolerance effect.

High potency products can have side effects like 'the jitters' or paranoia.  One out of every 6 people has genetics that can make them very sensitive to THC, even at very low doses.  Consuming fixed-ratio products with CBD in at least a 1:1 or 2:1 ratio to THC can smooth out that experience to make it enjoyable.

Street cannabis and 'hemp-derived' THC products aren't always tested, and could be unsafe.  The hemp-THC (a.k.a. delta-8) market side-skirts regulatory testing through loopholes in the law, so be wary of products you can buy legally at a gas station or convenience store.  Even online CBD products aren't always tested to verify potency or purity.  Buy lab-tested products for safety.