Answer :
Therapeutic drug levels can be maintained more evenly with patient-controlled analgesia.
An analgesic drug, also known as a pain reliever or painkiller, is any member of the class of drugs used to alleviate pain. It is commonly used to elicit cooperation for a medical procedure. Analgesics are a type of medication that is used to treat pain. Acetaminophen (Tylenol), which is available over the counter (OTC) or by prescription when combined with another drug, is one of them, as are opioids (narcotics), which are only available by prescription.
Therapeutic drug levels are laboratory tests used to determine the amount of a drug in the blood. Blood is drawn from a vein, usually the inside of the elbow or the back of the hand (venipuncture).
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