Idiosyncratic drug reactions may be defined as adverse effects that cannot be explained by the known mechanisms of action of the offending agent, do not occur at any dose in most patients, and develop mostly unpredictably in susceptible individuals only.
What is idiosyncratic reaction example?
Idiosyncratic reactions are unpredictable and not explained by the pharmacologic properties of the drug. An example is the individual with infectious mononucleosis who develops a rash when given ampicillin.
What causes idiosyncratic reaction?
The propensity of a drug to cause an idiosyncratic reaction is dependent on its chemical characteristics, but individual susceptibility is determined by patient-specific factors, in particular the expression of immunologic receptors that display drug-derived antigens on the cell surface.
What does idiosyncratic action mean?
Idiosyncrasy is an abnormal reactivity to a chemical that is peculiar to a given individual. It could be: An abnormally exaggerated response, or an abnormal lack of response.What is idiosyncrasy of drug?
“Drug idiosyncrasy” refers to untoward reactions to drugs that occur in a small fraction of patients and have no obvious relationship to dose or duration of therapy. The liver is a frequent target for toxicity.
What is another name for an idiosyncratic reaction?
Idiosyncratic drug reactions, also known as type B reactions, are drug reactions that occur rarely and unpredictably amongst the population.
What is an example of an idiosyncrasy?
The definition of an idiosyncrasy is an unusual behavior, mannerism or reaction of a person or group of people. An example of idiosyncrasy is someone being allergic to air. noun.
What is idiosyncratic toxicity?
Idiosyncratic toxicity can occur when a convergence of risk factors, including drug exposure, tips the risk-benefit balance away from benefit and toward risk.What is an idiosyncratic type?
Idiosyncrasy: “1. A structural or behavioral characteristic peculiar to an individual or group. 2. A physiological or temperamental peculiarity.” ( AHD)
What is idiosyncrasy Mcq?An adverse effect that is expected and specific to a person. An therapeutic effect that is unexpected and specific to a person.
Article first time published onWhich of the following is idiosyncratic ADR?
WHAT IS AN IDIOSYNCRATIC ADR? Idiosyncratic ADRs are unpredictable and difficult to prevent, if risk factors for occurrence are unknown. Idiosyncratic ADRs do not occur in most patients, may be unrelated to both the dose and the pharmacology of the drug, and can be potentially life-threatening.
What is drug synergy?
Synergism, Synergy. An interaction between two or more drugs that causes the total effect of the drugs to be greater than the sum of the individual effects of each drug. A synergistic effect can be beneficial or harmful.
What factors influence absorption?
- physicochemical properties (e.g. solubility)
- drug formulation (e.g. tablets, capsules, solutions)
- the route of administration (e.g. oral, buccal, sublingual, rectal, parenteral, topical, or inhaled)
- the rate of gastric emptying.
When is the combined effect of two drugs?
When two drugs are used together, their effects can be additive (the result is what you expect when you add together the effect of each drug taken independently), synergistic (combining the drugs leads to a larger effect than expected), or antagonistic (combining the drugs leads to a smaller effect than expected).
How is bioavailability determined?
Bioavailability of a drug is largely determined by the properties of the dosage form, which depend partly on its design and manufacture. Differences in bioavailability among formulations of a given drug can have clinical significance; thus, knowing whether drug formulations are equivalent is essential.
What are the objectives of pharmacy and therapeutic committee PTC?
Objectives of PTC: Educational: The committee recommends or assists in the formulation of functions, designed to meet the needs of the professional staff, the physicians, nurses, pharmacists and other health care practitioners, for the complete current knowledge of the matters related to drugs and their uses.
What is idiosyncratic effect in pharmacology?
Idiosyncratic drug reactions may be defined as adverse effects that cannot be explained by the known mechanisms of action of the offending agent, do not occur at any dose in most patients, and develop mostly unpredictably in susceptible individuals only.
What is idiosyncratic literature?
An idiosyncrasy is an unusual feature of a person (though there are also other uses, see below). … The term is often used to express eccentricity or peculiarity.
What are symptoms of an idiosyncratic reaction to contrast media?
These reactions primarily include fevers, chills, rigors, flushing, dizziness, and, occasionally, hypotension. These reactions can occur even if immunotherapy is administered as long as 2 years before ICM administration.
Where is the primary site of drug metabolism?
Most drugs must pass through the liver, which is the primary site for drug metabolism. Once in the liver, enzymes convert prodrugs to active metabolites or convert active drugs to inactive forms. The liver’s primary mechanism for metabolizing drugs is via a specific group of cytochrome P-450 enzymes.
Who is working as a secretary of the PTC?
Composition of PTC: The pharmacist is designated as the “ Secretary ” of the committee.
What is idiosyncrasy in linguistics?
Linguistic idiosyncrasies can be defined as the atypical use of a standard word or phrase to express a specific meaning. While the word used is part of the speaker’s native language, it is not typically associated with the word or phrase of reference.
What is another word for idiosyncrasy?
In this page you can discover 16 synonyms, antonyms, idiomatic expressions, and related words for idiosyncrasy, like: quirk, peculiarity, eccentricity, idiom, characteristic, habit, affectation, idiosyncracy, singularity, foible and mannerism.
What is the difference between idiosyncrasy and hypersensitivity?
hypersensitivity to a substance, without connection to pharmacological toxicity. Idiosyncrasy stresses here the fact that other individuals would react differently, or not at all and that the reaction is an individual one, based on a specific condition of the one who suffers from it (1).
What is it called when medicine has the opposite effect?
A paradoxical drug reaction constitutes an outcome that is opposite from the outcome that would be expected from the drug’s known actions.
What is an example of an adverse drug reaction?
Examples of such adverse drug reactions include rashes, jaundice, anemia, a decrease in the white blood cell count, kidney damage, and nerve injury that may impair vision or hearing. These reactions tend to be more serious but typically occur in a very small number of people.
What are the adverse drug reactions?
An adverse drug reaction (ADR) can be defined as ‘an appreciably harmful or unpleasant reaction resulting from an intervention related to the use of a medicinal product; adverse effects usually predict hazard from future administration and warrant prevention, or specific treatment, or alteration of the dosage regimen, …
What is the purpose of pre clinical testing Mcq?
The main goals of preclinical studies are to determine a starting, safe dose for first-in-human study and assess potential toxicity of the product, which typically include new medical devices, prescription drugs, and diagnostics.
Is an example of latent adverse drug reactions?
An instructive example of a long-latency adverse drug reaction–sclerosing peritonitis due to practolol.
Who was first pharmacist Mcq?
5. Who is known as first Pharmacist? Galen .
Which of the following effects of epinephrine would be blocked by phentolamine but not by metoprolol?
Which of the following effects of epinephrine would be blocked by prazosin but not by metoprolol? Mydriasis caused by contraction of the pupillary dilator radial smooth muscle is mediated by α receptors. All the other effects listed are mediated by β receptors. The answer is C.
