Those with a narrow margin are more difficult to dose and administer , and may require therapeutic drug monitoring -LRB- examples are warfarin , some antiepileptics , aminoglycoside antibiotics -RRB- .

Medication with a narrow margin are more difficult to dose and give to a person , and may require therapeutic drug monitoring -LRB- examples are warfarin , some antiepileptics , aminoglycoside antibiotics -RRB- .
