How many nanograms of THC is considered under the influence?

5 nanograms
If a person’s whole blood concentration of tetrahydrocannabinol or THC, which is the active compound in marijuana, is 5 nanograms or more, there is a presumption that he or she is under the influence of marijuana.

How long does it take to get under 5 nanograms?

THC concentrations typically peak during the act of smoking, while peak 11-OH THC concentrations occur approximately 9-23 minutes after the start of smoking. Concentrations of both analytes decline rapidly and are often < 5 ng/mL at 3 hours.

How long after an edible can I drive?

The Automobile Club says people using marijuana should wait eight hours after smoking, and 10 hours after ingesting edibles, before they get behind the wheel.

Do edibles still make your eyes red?

Red eyes after taking edibles are entirely normal and totally harmless. It can be a tough side effect to deal with, especially if you take edibles as a medication. Taking cannabis does have a certain stigma, and dealing with red eyes at work can bring unwanted attention.

How long does 600mg edible last in your system?

The authors of a review article note that the effects from edibles last about 6–8 hours. However, it is not uncommon for the high to last up to 8–12 hours if the person is sensitive but only about 4 hours if the person has a higher tolerance.

How long do Rice Krispie treat edibles last in your system?

Blood: 3-4 hours. Saliva: 24-72 hours. Urine: 3-30 days.

How long do red eyes last from edible?

All the eye redness will eventually go away, but just know; eye redness caused by taking edibles usually lasts longer than other marijuana administration choices. It not only lasts longer but takes longer to reach its maximum effect of 2-3 hours. The redness can last anywhere from 4 – 12 hours, depending on the dose.