Why is the weight of a person important when prescribing medications?and can you prescribe for an overweight child the same dose given to a fit adult?

All medications: Are based on the weight of the person, usually in kilograms.

Dilution: The amount of a medication needed to work will depend on how strong it needs to be.Compare the process to putting a teaspoon of x in 4 ounces against a teaspoon in 6 ounces.You end up with one more dilute and not as strong.Prescribing by weight is important for most but not all medications.It is most important in childhood when weights at a given age vary by quite a bit.