The major psychoactive chemical compound in cannabis is Δ9-tetrahydrocannabinol (commonly abbreviated as THC). However, there are at least 66 other cannabinoids present in cannabis, including cannabidiol (CBD), cannabinol (CBN) and tetrahydrocannabivarin (THCV) that contribute to the psychoactive effects.

whether or not marijuana is a drug depends on your definition of a drug.

if the word 'drug' comes from German 'trogen', dried plant material, it is as much a drug as dried grass, or salvia divinorum leaves. it sure is plant material.

if by drug you mean a substance that elicits a (psycho)pharmacological response in man, such as acetaminophen, Tylenol, Ritalin, mdma... yeah it does something to you alright.

if, at last by drug you mean something destructive to the body like as crack cocaine or physiologically addictive like alcohol, then it is not.

everything depends on context.

It depends on how much weed you've smoked. If you've been smoking everyday for a long time, it can take 1-2 months for it to come out of your system. If you only smoke a couple times a month or less, it can be out in days.

The cannabis plant has been shown to alleviate a number of medical symptoms including headaches, nausea and pain.

Cannabinoids are a group of various chemical compounds found in the cannabis plant which act on the receptors located on cells which repress the release of certain neurotransmitters in the brain. Different strains of the plant offer varying levels of cannabinoid and affect dosing when used for medicinal purposes. When found in nature, cannabinoids are formed in the sticky resinous structures known as glandular trichomes. A single trichome gland can contain a variety of cannabinoids, and recent research has shown that these cannabinoids work together to produce their medical benefits. This phenomenon has been called the "entourage effect" because it shows that a diverse variety of cannabinoids, in precise ratios, has a more significant medical benefit than an isolated single cannabinoid synthesized in a lab.

Tetrahydrocannabinol (THC) THC is the best-known cannabinoid and is the primary psychoactive compound. It has also been found to be neuroprotective with analgesic (pain relieving) effects.

Cannabinol (CBN) CBN is also non-psychoactive and is generally attributed with a sedative effect. The typical amount of CBN found in most samples of cannabis is less than 1%.

Tetrahydrocannabivarin (THCV) THCV is commonly believed to be an appetite suppressant. In addition, recent research suggests that this compound may be helpful in treating metabolic disorders including diabetes.

Cannabichromene (CBC) CBC is perhaps the least understood cannabinoid, but potentially among the most important. It is believed to stimulate bone growth, as well has inhibit inflammation and pain.

Cannabidivarin (CBDV) CBDV has been a relatively ignored cannabinoid until recently where many researchers believe that it may offer another option for the treatment of epilepsy.

Cannabidiol (CBD) CBD is where many of the medical benefits are attributed to cannabis and has resulted in many strains being 'enriched' to increase their CBD content. CBD is not psychoactive.

Tetrahydrocannabinolic Acid (THCA) THCA is the most prominent compound in fresh, undried cannabis. While the compound does not have psychoactive effects in its own right, it does have anti-inflammatory and neuroprotective effects.

Cannabigerol (CBG) CBG is a non-physcoactive cannabinoid. Early results suggest it plays a role in fighting glaucoma symptoms, inflamed bowels and potentially as treatment for bacterial infections like MRSA.

Cannabidiolic Acid (CBDA) CBDA is a non-psychoactive cannabinoid believed to have anti-inflammatory properties. The compound is also thought offer benefits when dealing with nausea and vomiting

reference: greenbloomdotorg