AIDS/HIV:
Cannabis is remarkably powerful in fighting nausea and vomiting in AIDS victims, allowing them to consume food and not suffer through anorexia.

Anxiety:
Medical Cannabis can counteract feelings of severe anxiety in patients.

Cancer and Chemotherapy:
Nausea and vomiting, which can last for days after a single treatment and be so violent as to threaten to break bones and rupture the aesophagus, are common side effects of the chemotherapies used in treating cancer. Many patients develop such an aversion to the site or odor of food that they stop eating altogether and lose the will to live. Up to 40% of cancer patients undergoing chemotherapy do not respond to the standard treatment for preventing vomiting. These use expensive "antiemetics" drugs such as "Zofran". "Marinol" which uses THC was approved after much resistance in the USA in 1986. It is effective in many cases where other drugs have failed. Smoking or eating cannabis also seems to provide relief where standard treatments fail. The effectiveness of cannabis in treating nausea and vomiting from cancer chemotherapy is dose-related. The higher the blood levels of THC, the more complete the relief of vomiting.

Epilepsy:
Epilepsy is a neurological condition which affects approximately 1 in 100 people. Depending on how wide spread in the brain the neuroligical disturbance is (the focus), there are a range of possible seizures from lapses in consciousness (absence) or convulsions (Grand Mal) to grimacing or repetitive movements (temporal) to just odd sensations (auras). Epilepsy is as individual as the people who have it and everyone has their own patterns of seizures. Cannabis has long been known to have anti-convulsant properties, and these have been investigated from the 19th century. Large amounts of anecdotal reports and 1-patient case studies indicate the assistance of cannabis in controlling seizures. Cannabis analogues have been shown to prevent seizures when given in combination with prescription drugs.

Glaucoma:
The most common form of glaucoma, ‘open angle glaucoma’ happens when the channels that carry fluid out of the eyeball gradually become narrower causing the intra ocular pressure to increase slowly over time, damaging the optic nerve that relays signals from the eye to the brain and resulting in blindness. Fortunately, it can be treated with cannabis. Cannabis relieves symptoms by reducing intra ocular pressure, thereby slowing down the progress of the condition, sometimes bringing it to a complete halt.

Multiple Sclerosis:
Multiple Sclerosis destroys the sheathing that protects nerve fibres, interfering with the function of the nervous system. The victim suffers painful muscle spasms, loss of coordination, tremors, paralysis, insomnia, mood swings and depression, blurred vision, impotence, loss of bladder control and more. Patients who use cannabis report a soothing of the painful muscle spasms and improved muscle coordination. Some are able to walk unaided when they were previously unable to do so. It also helps blurred vision, tremors, loss of bladder control, insomnia and depression

Pain:
The painkilling properties of Cannabis (THC) are comparable to those of codeine and other commonly used painkillers without the side effects or risk of addiction. Studies have found that the dose of THC required to kill pain was far smaller than the amount of codeine required to give the same level of relief. Amazingly the same dosage of cannabis has a consistently stronger painkilling effect for experienced users of cannabis than for inexperienced users