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The absolute bioavailability is the dose-corrected area under curve (AUC) non-intravenous divided by AUC intravenous. The formula for calculating the absolute bioavailability, F, of a drug administered orally (po) is given below (where D is dose administered).
An equianalgesic chart is a conversion chart that lists equivalent doses of analgesics (drugs used to relieve pain). Equianalgesic charts are used for calculation of an equivalent dose (a dose which would offer an equal amount of analgesia) between different analgesics. [1]
Hydromorphone is a rapid-acting painkiller; however, some formulations may last up to several hours. Patients who stop taking this drug abruptly may experience withdrawal symptoms, [28] [30] which may start within hours of taking the last dose of hydromorphone, and last up to several weeks. [26]
Furosemide, sold under the brand name Lasix among others, is a loop diuretic medication used to treat edema due to heart failure, liver scarring, or kidney disease. [4] Furosemide may also be used for the treatment of high blood pressure. [4] It can be taken intravenously or orally. [4]
However, recent research found various ways to improve oral bioavailability of these drugs. In particular permeation enhancers, [27] ionic liquids, [28] lipid-based nanocarriers, [29] enzyme inhibitors and microneedles [30] have shown potential. Oral administration is often denoted "PO" from "per os", the Latin for "by mouth".
Chlorothiazide, sold under the brand name Diuril among others, is an organic compound used as a diuretic and as an antihypertensive. [1] [2]It is used both within the hospital setting or for personal use to manage excess fluid associated with congestive heart failure.
Approved indication for dihydrocodeine is the management of moderate to moderately severe pain as well as coughing and shortness of breath. As is the case with other drugs in this group, the antitussive dose tends to be less than the analgesic dose, and dihydrocodeine is a powerful cough suppressant like all other members of the immediate codeine family (see below) and their cousins ...
Oral hydrocodone has a mean equivalent daily dosage (MEDD) factor of 0.4, meaning that 1 mg of hydrocodone is equivalent to 0.4 mg of intravenous morphine. However, because of morphine's low oral bioavailability , there is a 1:1 correspondence between orally administered morphine and orally administered hydrocodone.