When smoking marijuana, its effects begin immediately after drug enter the brain and last 1-3 hours. If marijuana is consumed in food or drink, short-term effects begin more slowly, usually 1 / 2 to 1 hour, and last longer, as long as 4 hours. Smoking marijuana deposits several times more THC in the blood than eat or drinking drug.
Within a few minutes after inhaling marijuana smoke, The heart starts beating faster, the bronchial tract relax and become enlarged, and blood vessels in the eyes expand, making eyes red. Heart rate, usually 70-80 beats per minute may increase by 20 to 50 beats per minute, and in some cases, even double. This effect may be greater if other drugs are taken with marijuana.
