Definition of Dosage of Drugs
Dosage – the therapeutic course of a DRUG, encompassing the drug’s DOSE (amount of the drug taken), the frequency of the doses, the health condition and status of the person (including age and gender), and the total length of time the drug the person needs to take the drug.
For many drugs there are standard dosages that are applicable to most people.
The doctor or pharmacist calculates dosages for people who fall outside the standard range, and for NARROW THERAPEUTIC INDEX (NTI) drugs (drugs for which the margin between therapeutic and toxic is very close).
People who may fall outside the standard range of dosage for many drugs are the very young, the very old, those who are extremely underweight, those who are extremely overweight, those who have multiple health conditions, and those who take numerous medications.