Drugs

Caffeine is the world's most popular drug, with consumption estimated to be around 70mg per person per day. Fifty four per cent of caffeine is consumed in coffee, 43 per cent in tea and 3 per cent in other forms like cola or medications. Caffeine is a psychoactive drug, meaning it alters mood, thinking or behaviour. Caffeine speeds up the functions of the central nervous system and stimulates thinking, keeps people awake and suppresses appetite.

Health effects

In large doses, caffeine can produce headaches, jitters, nervousness and even delirium. This is especially so for someone not used to taking caffeine. The immediate effects of caffeine include: increased alertness, metabolism and body temperature. Caffeine also stimulates the secretion of gastric acid and increases urination.

Most researchers agree that there is very little health risk when less than 600mg of caffeine is consumed a day. Many doctors recommend less than 200mg a day (approximately 2 to 4 cups of coffee or tea) if the person is suffering anxiety or stress, or is pregnant. Regular use of more than 600 mg of caffeine per day can cause chronic insomnia, persistent anxiety, depression and stomach upset.

Hooked

People can become dependent on caffeine. This means they have a strong desire to have caffeine because it has become important in their daily lives. If caffeine is unavailable they may panic or feel anxious.

People who are dependent on caffeine may experience withdrawal symptoms such as headaches, irritability and a feeling of tiredness if they stop or dramatically cut down their caffeine intake.

© 28-07-2001: Authorised: Craig Smith