Adverse Drug Reaction Impact Factor

 Adverse drug reaction (ADR) is an injury caused by taking medication/drugs used for preventing diseases. ADRs may occur by  a single dose or prolonged administration of a drug or result from having the combination of two or more drugs.An ADR is a special type of ADE(adverse drug event refers to any injury occurring at the time a drug is used, whether or not it is identified as a cause of the injury in which a causative relationship can be shown). ADRs are only one type of medication-related harm, as harm can also be caused by having the prescribed medications.Many of these ADRs can be avoided when greater care is taken.All the prescribers need to make a judgment about the likelihood that a patient will either gain from the beneficial effects or experience an ADR before prescribing any medication. Some drugs rarely cause ADRs such as paracetamol,while others frequently cause ADR like cancer chemotherapy.Adverse effects may be local, i.e. limited to a certain location, or systemic, where medication has caused adverse effects throughout the systemic circulation.For instance, some ocular antihypertensives cause systemic effects,although they are administered locally as eye drops, since a fraction escapes to the systemic circulation.

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