Why chloroquine has high volume of distribution

Discussion in 'Chloroquine Without A Doctor Prescription' started by art3dnet, 16-Mar-2020.

  1. savich Moderator

    Why chloroquine has high volume of distribution


    In rough terms, drugs with a high lipid solubility (non-polar drugs), low rates of ionization, or low plasma protein binding capabilities have higher volumes of distribution than drugs which are more polar, more highly ionized or exhibit high plasma protein binding in the body's environment. Volume of distribution may be increased by kidney failure (due to fluid retention) and liver failure (due to altered body fluid and plasma protein binding). The initial volume of distribution describes blood concentrations prior to attaining the apparent volume of distribution and uses the same formula.

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    If the drug distributes into all body water the volume of distribution would increase to approximately = 0.57 l/kg If the drug readily diffuses into the body fat the volume of distribution may increase dramatically, an example is chloroquine which has a = 250-302 l/kg Conversely, it may be decreased in dehydration. Acetylsalicylic acid has a low volume of distribution and is basically distributed in blood, whereas digoxin has a high volume of distribution and is distributed into intravascular space as well as fat and muscle. Hemodialysis removes only the toxins in the intravascular space. The effect of chloroquine, paracetamol and Promethazine on the pharmacokinetic profile of chlorpropamide was investigated in human subjects. The batches of chlorpropamide, chloroquine, paracetamol and Promethazine used were subjected to quality control studies using official methods.

    As body composition changes with age, V But this is generally not what happens. Is not a physiologic value; it is more a reflection of how a drug will distribute throughout the body depending on several physicochemical properties, e.g. The unit for Volume of Distribution is typically reported in liters.

    Why chloroquine has high volume of distribution

    PLAQUENIL HYDROXYCHLOROQUINE SULFATE TABLETS, USP DESCRIPTION, Volume of Distribution - an overview ScienceDirect Topics

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  6. The volume of distribution at steady state will also be influenced by protein binding and consequently the terminal half-life. Drugs can compete for the same binding site and thus there is the potential for drug-drug interactions, this would be a particular concern for highly protein bound drugs that have a low therapeutic index such as warfarin.

    • Distribution and plasma protein binding Cambridge MedChem..
    • THE EFFECTS OF CHLOROQUINE, PARACETAMOL AND PROMETHAZINE ON THE..
    • Drug distribution & clearance - SlideShare.

    The drug is extensively distributed, with a volume of distribution of 200 to 800 L/kg when calculated from plasma concentrations and 200 L/kg when estimated from whole blood data concentrations being 5 to 10 times higher. Chloroquine is 60% bound to plasma proteins and equally cleared by the kidney and liver. Volume of distribution has nothing to do with the actual volume of the body or its fluid compartments but rather involves the distribution of the drug within the body. For a drug that is highly tissue-bound, very little drug remains in the circulation; thus, plasma concentration is low and volume of distribution is high. Chloroquine was given in 300 mg single doses as an i.v. infusion, an oral solution and as tablets at intervals of at least 56 days to 11 healthy volunteers. Concentrations of chloroquine and its metabolite desethylchloroquine were measured in plasma, erythrocytes and urine using h.p.l.c. 2 Chloroquine was detectable in all plasma samples up.

     
  7. Kowka User

    Chloroquine is the generic form of the brand-name prescription medicine Aralen, which is used to prevent and treat malaria — a mosquito-borne disease caused by a parasite — and to treat amebiasis, an infection of the intestines caused by a parasite. Malarone Vs Chloroquine plus Proguanil - TripAdvisor Read Reviews. Atovaquone/proguanil Reviews & Ratings at Chloroquine proguanil anti malaria tablets, chloroquine.
     
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  9. AlfaBeta XenForo Moderator

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  10. abcd67 Guest

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