Are all drugs dangerous?

People take so-called recreational drugs, such as cannabis and heroin, because of the effect they have on the brain. These drugs are different from medical drugs that people take when they have an illness disease. Recreational drugs can be a danger to health. Some of them make people feel excited and full of energy. Others make them feel sleepy and some drugs can make people experience imaginary situations. All these drugs cause the brain to malfunction, and if taken regularly they can cause permanent damage to health.

Some of these drugs are addictive. This means that they cause changes in the brain that make people crave them, even though the pleasant effects may wear off.

Medical drugs work by correcting the chemical reactions within the body that are responsible for disease. For example, insulin injections replace insulin that is not being produced by the pancreas, so sugar can be used properly by the body. In depression and mental illness, drugs can restore the balance of chemicals in the brain. Aspirin is often given to cure a headache, but it can also neutralize the inflammation that causes the pain in the joints of people suffering from arthritis.

Modern drug research studies the cause of diseases, and then designs molecules that interrupt or reverse the disease process. All drugs cause some unwanted effects, and scientists try to find new drugs that relieve the disease without causing further problems.