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Bioavailability

Index Bioavailability

In pharmacology, bioavailability (BA or F) is a subcategory of absorption and is the fraction of an administered dose of unchanged drug that reaches the systemic circulation, one of the principal pharmacokinetic properties of drugs. [1]

54 relations: Abbreviated New Drug Application, Acid dissociation constant, ADME, Antacid, Approved Drug Products with Therapeutic Equivalence Evaluations, Bioequivalence, Biopharmaceutics Classification System, Brassica, Caco-2, Circadian rhythm, Circulatory system, Clearance (pharmacology), Clinical trial, Confidence interval, Cranberry juice, CYP1A2, CYP2C19, CYP2C9, CYP3A4, Dietary supplement, Dose (biochemistry), Dose–response relationship, Efflux (microbiology), Enterohepatic circulation, Enzyme, Enzyme inhibitor, Fasting, First pass effect, Food and Drug Administration, Gastrointestinal tract, Grapefruit juice, Hydrophobe, Integral, Intravenous therapy, Isotopic labeling, Kidney, Lipinski's rule of five, Liver, Medication, Modified-release dosage, Oral administration, P-glycoprotein, Pharmacodynamics, Pharmacokinetics, Pharmacology, Phenytoin, Pomelo, Route of administration, Solubility, Subcutaneous injection, ..., Sublingual administration, Theophylline, Transdermal, Volume of distribution. Expand index (4 more) »

Abbreviated New Drug Application

An Abbreviated New Drug Application (ANDA) is an application for a U.S. generic drug approval for an existing licensed medication or approved drug.

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Acid dissociation constant

An acid dissociation constant, Ka, (also known as acidity constant, or acid-ionization constant) is a quantitative measure of the strength of an acid in solution.

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ADME

ADME is an abbreviation in pharmacokinetics and pharmacology for "absorption, distribution, metabolism, and excretion", and describes the disposition of a pharmaceutical compound within an organism.

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Antacid

An antacid is a substance which neutralizes stomach acidity and is used to relieve heartburn, indigestion or an upset stomach.

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Approved Drug Products with Therapeutic Equivalence Evaluations

The Drug Price and Competition Act (Hatch-Waxman Act) requires FDA to publish Approved Drug Products with Therapeutic Equivalence Evaluations, commonly known as the Orange Book.

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Bioequivalence

Bioequivalence is a term in pharmacokinetics used to assess the expected in vivo biological equivalence of two proprietary preparations of a drug.

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Biopharmaceutics Classification System

The Biopharmaceutics Classification System is a system to differentiate the drugs on the basis of their solubility and permeability.

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Brassica

Brassica is a genus of plants in the mustard family (Brassicaceae).

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Caco-2

The Caco-2 cell line is a continuous line of heterogeneous human epithelial colorectal adenocarcinoma cells, developed by the Sloan-Kettering Institute for Cancer Research through research conducted by Dr.

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Circadian rhythm

A circadian rhythm is any biological process that displays an endogenous, entrainable oscillation of about 24 hours.

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Circulatory system

The circulatory system, also called the cardiovascular system or the vascular system, is an organ system that permits blood to circulate and transport nutrients (such as amino acids and electrolytes), oxygen, carbon dioxide, hormones, and blood cells to and from the cells in the body to provide nourishment and help in fighting diseases, stabilize temperature and pH, and maintain homeostasis.

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Clearance (pharmacology)

In pharmacology, the clearance is a pharmacokinetic measurement of the volume of plasma from which a substance is completely removed per unit time; the usual units are mL/min.

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Clinical trial

Clinical trials are experiments or observations done in clinical research.

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Confidence interval

In statistics, a confidence interval (CI) is a type of interval estimate, computed from the statistics of the observed data, that might contain the true value of an unknown population parameter.

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Cranberry juice

Cranberry juice is the juice of the cranberry.

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CYP1A2

Cytochrome P450 1A2 (abbreviated CYP1A2), a member of the cytochrome P450 mixed-function oxidase system, is involved in the metabolism of xenobiotics in the body.

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CYP2C19

Cytochrome P450 2C19 (abbreviated CYP2C19) is an enzyme.

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CYP2C9

Cytochrome P450 2C9 (abbreviated CYP2C9) is an enzyme that in humans is encoded by the CYP2C9 gene.

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CYP3A4

Cytochrome P450 3A4 (abbreviated CYP3A4) is an important enzyme in the body, mainly found in the liver and in the intestine.

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Dietary supplement

A dietary supplement is a manufactured product intended to supplement the diet when taken by mouth as a pill, capsule, tablet, or liquid.

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Dose (biochemistry)

A dose is a measured quantity of a medicine, nutrient, or pathogen which is delivered as a unit.

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Dose–response relationship

The dose–response relationship, or exposure–response relationship, describes the change in effect on an organism caused by differing levels of exposure (or doses) to a stressor (usually a chemical) after a certain exposure time, or to a food.

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Efflux (microbiology)

Active efflux is a mechanism responsible for moving compounds, like neurotransmitters, toxic substances, and antibiotics, out of the cell; this is considered to be a vital part of xenobiotic metabolism.

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Enterohepatic circulation

Enterohepatic circulation refers to the circulation of biliary acids, bilirubin, drugs or other substances from the liver to the bile, followed by entry into the small intestine, absorption by the enterocyte and transport back to the liver.

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Enzyme

Enzymes are macromolecular biological catalysts.

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Enzyme inhibitor

4QI9) An enzyme inhibitor is a molecule that binds to an enzyme and decreases its activity.

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Fasting

Fasting is the willing abstinence or reduction from some or all food, drink, or both, for a period of time.

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First pass effect

The first pass effect (also known as first-pass metabolism or presystemic metabolism) is a phenomenon of drug metabolism whereby the concentration of a drug is greatly reduced before it reaches the systemic circulation.

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Food and Drug Administration

The Food and Drug Administration (FDA or USFDA) is a federal agency of the United States Department of Health and Human Services, one of the United States federal executive departments.

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Gastrointestinal tract

The gastrointestinal tract (digestive tract, digestional tract, GI tract, GIT, gut, or alimentary canal) is an organ system within humans and other animals which takes in food, digests it to extract and absorb energy and nutrients, and expels the remaining waste as feces.

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Grapefruit juice

Grapefruit juice is the juice from grapefruits.

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Hydrophobe

In chemistry, hydrophobicity is the physical property of a molecule (known as a hydrophobe) that is seemingly repelled from a mass of water.

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Integral

In mathematics, an integral assigns numbers to functions in a way that can describe displacement, area, volume, and other concepts that arise by combining infinitesimal data.

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Intravenous therapy

Intravenous therapy (IV) is a therapy that delivers liquid substances directly into a vein (intra- + ven- + -ous).

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Isotopic labeling

Isotopic labeling (or isotopic labelling) is a technique used to track the passage of an isotope (an atom with a detectable variation) through a reaction, metabolic pathway, or cell.

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Kidney

The kidneys are two bean-shaped organs present in left and right sides of the body in vertebrates.

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Lipinski's rule of five

Lipinski's rule of five also known as the Pfizer's rule of five or simply the rule of five (RO5) is a rule of thumb to evaluate druglikeness or determine if a chemical compound with a certain pharmacological or biological activity has chemical properties and physical properties that would make it a likely orally active drug in humans.

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Liver

The liver, an organ only found in vertebrates, detoxifies various metabolites, synthesizes proteins, and produces biochemicals necessary for digestion.

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Medication

A medication (also referred to as medicine, pharmaceutical drug, or simply drug) is a drug used to diagnose, cure, treat, or prevent disease.

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Modified-release dosage

Modified-release dosage is a mechanism that (in contrast to immediate-release dosage) delivers a drug with a delay after its administration (delayed-release dosage) or for a prolonged period of time (extended-release dosage) or to a specific target in the body (targeted-release dosage).

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Oral administration

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P-glycoprotein

P-glycoprotein 1 (permeability glycoprotein, abbreviated as P-gp or Pgp) also known as multidrug resistance protein 1 (MDR1) or ATP-binding cassette sub-family B member 1 (ABCB1) or cluster of differentiation 243 (CD243) is an important protein of the cell membrane that pumps many foreign substances out of cells.

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Pharmacodynamics

Pharmacodynamics is the study of the biochemical and physiologic effects of drugs (especially pharmaceutical drugs).

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Pharmacokinetics

Pharmacokinetics (from Ancient Greek pharmakon "drug" and kinetikos "moving, putting in motion"; see chemical kinetics), sometimes abbreviated as PK, is a branch of pharmacology dedicated to determining the fate of substances administered to a living organism.

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Pharmacology

Pharmacology is the branch of biology concerned with the study of drug action, where a drug can be broadly defined as any man-made, natural, or endogenous (from within body) molecule which exerts a biochemical or physiological effect on the cell, tissue, organ, or organism (sometimes the word pharmacon is used as a term to encompass these endogenous and exogenous bioactive species).

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Phenytoin

Phenytoin (PHT), sold under the brand name Dilantin among others, is an anti-seizure medication.

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Pomelo

The pomelo, Citrus maxima or Citrus grandis, is a natural (non-hybrid) citrus fruit, similar in appearance to a large grapefruit, native to South and Southeast Asia.

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Route of administration

A route of administration in pharmacology and toxicology is the path by which a drug, fluid, poison, or other substance is taken into the body.

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Solubility

Solubility is the property of a solid, liquid or gaseous chemical substance called solute to dissolve in a solid, liquid or gaseous solvent.

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Subcutaneous injection

A subcutaneous injection is administered as a bolus into the subcutis, the layer of skin directly below the dermis and epidermis, collectively referred to as the cutis.

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Sublingual administration

Sublingual (abbreviated SL), from the Latin for "under the tongue", refers to the pharmacological route of administration by which substances diffuse into the blood through tissues under the tongue.

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Theophylline

Theophylline, also known as 1,3-dimethylxanthine, is a methylxanthine drug used in therapy for respiratory diseases such as chronic obstructive pulmonary disease (COPD) and asthma under a variety of brand names.

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Transdermal

Transdermal is a route of administration wherein active ingredients are delivered across the skin for systemic distribution.

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Volume of distribution

In pharmacology, the volume of distribution (VD, also known as apparent volume of distribution) is the theoretical volume that would be necessary to contain the total amount of an administered drug at the same concentration that it is observed in the blood plasma.

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Absolute bioavailability, Active (pharmacology), Bio-availability, Bioaccessibility, Bioavailable, Bioavailiability, Oral bioavailability, Relative bioavailability.

References

[1] https://en.wikipedia.org/wiki/Bioavailability

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