The amount of harm that a drug can do to an organism can be described as drug toxicity. A drug's toxic effects are dose-dependent and can affect the whole system, such as the CNS, or a particular organ, such as the liver. Usually, medication toxicity occurs at concentrations that surpass a drug's therapeutic effectiveness. Toxic and therapeutic effects can happen simultaneously, however. Drug absorption is established by the chemical characteristics, composition, and route of administration of the drug. Despite the route of administration, the medication should be able to be consumed in response. Solid dosage forms should therefore be capable of disintegrating and disaggregating. And the route of administration in medicine and pharmacological medicine is that the path into the body is taken by a medicine, fluid, poison, or alternative substance. Routes of administration square measure usually defined by the placement at that the material is applied.