Drug therapy or Pharmacotherapy is a treatment which is based on the use of chemical drugs. Drug therapy is based on the famous lock and key model. In drug therapy, drug interacts with receptors on the surface of cell structure or enzymes that are present within cells. It is assumed that these receptor and enzyme molecules are placed in a specific three-dimensional structure. In this structure the substances that only fit precisely will get attached. In drug therapy disease causing germs are eliminated so that there is no longer any sign of illness and it promotes normal cell functioning. Current drug therapy can produce long-term remission or outright cure, depending on the type and extent of illness.
Drugs that damage or destroy disease causing germs are at times harmful for the body cells and may cause certain side effects. These side effects can be identified by scientific means and measures are subsequently taken. It is because of this reason a lot of research work is carried out before the drug is released into the market. Side effects do not always occur and at times possible side effects can also be predicted and measure taken accordingly.
Most side effects are temporary and subside once the body adjusts to the therapy or after the treatment is completed. The cause of side effects may also be due to the result of taking a certain medication in combination with another drug or substance. It may also occur when herbal supplements, or with some types of food or beverages are taken in conjunction to this mode of therapy.
If the patient is treated with a new medicine or with the ceasing of treatment or at times of dosage adjustments it may cause an unwanted experience with severe bodily reactions.