Caffeine is perhaps the most popular drug in the world. It is a white substance, bitter, similar to glass that is found in coffee, tea, cocoa and cola. It is also found in some products such as aspirin, cough medicines and cold medicines sold over the counter, soft drinks, diet pills and some drugs from the “street”.

When a person drinks two cups of coffee’s effects begin approximately 15-30 minutes. You can increase metabolism, body temperature and blood pressure, also contained an increased production of urine, higher levels of blood sugar, hand tremors, loss of coordination, loss of appetite and sleep late. With very high doses can cause nausea, vomiting, diarrhea, insomnia, tremors, headaches and nervousness. Poisonings have been reported based on caffeine tablets and these can result in convulsions, respiratory failure and death.

Tolerance to caffeine (the need for higher doses to achieve the same effect) may occur with consumption of more than 500-600 milligrams of caffeine per day, equivalent to 4-6 cups of coffee.

When a regular consumer stops using caffeine abruptly, symptoms such as headache, irritability and changes in mood .

As stimulants are known several groups of drugs that tend to increase alertness and physical activity. Some people use stimulants to counteract the drowsiness and feeling of “fatigue” caused by sleeping pills or alcohol. This stimulus-depression cycle is extremely harmful to the body and dangerous. Amphetamines, cocaine and caffeine are all stimulant drugs.

Effects:
Consumers of the drug show a sense of unease, anxiety and moodiness. Intensify these effects, the person shown talkative and with a false sense of self-confidence and power. Often triggers prolonged consumption of amphetamine psychosis: hallucinations (seeing, hearing, and feeling things that are not there), delusions (having thoughts or irrational beliefs) and paranoia (feeling trapped).