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Related Concept Videos

Drug Toxicity: Allergic Reactions01:30

Drug Toxicity: Allergic Reactions

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Drug-related allergies are immune-mediated responses triggered by the administration of pharmacological agents. These hypersensitivity reactions are classified based on the immune mechanisms involved. The four primary types—Type I, II, III, and IV—are mediated by different immunological pathways and exhibit distinct clinical manifestations.Type I Hypersensitivity/ IgE-Mediated Reactions: Immunoglobulin E (IgE) immediately mediates Type I hypersensitivity reactions. Upon initial...
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Allergic Drug Reactions01:27

Allergic Drug Reactions

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Allergic reactions related to drugs are hypersensitivity responses driven by the immune system and bear no connection to the drug's therapeutic action. While drugs in isolation do not trigger an immune response, they can interact with endogenous proteins to form antigens. These antigens stimulate lymphocytes to produce antibodies. IgE-type antibodies attach themselves to mast cells. Upon subsequent exposure to the same stimulus, the antigen-antibody interaction is initiated, unleashing...
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Drug Excretion: Miscellaneous Routes01:10

Drug Excretion: Miscellaneous Routes

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Drug excretion involves various organs, including the liver, intestines, skin, and eyes. In the case of drugs or toxins, they can be actively secreted into bile by transporters in the hepatocyte's canalicular membrane. These substances enter the GI tract during digestion and may be reabsorbed into the body from the intestine. This process, known as enterohepatic recycling, can significantly prolong the presence and effects of a substance in the body. To interrupt this cycle, specific...
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Drug toxicity: Drug–Drug Interaction01:30

Drug toxicity: Drug–Drug Interaction

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Drug–drug interactions can precipitate toxicity through multiple mechanisms. Absorption interactions alter how drugs enter the body, exemplified when ranitidine increases the absorption of basic drugs, while cholestyramine decreases the levels of propranolol. Protein binding interactions occur when drugs share the same binding sites on plasma proteins. Drugs like aspirin and warfarin, when bound in excess, can lead to increased free drug concentrations, enhancing the potential for...
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Allergic Reactions: Anaphylaxis01:30

Allergic Reactions: Anaphylaxis

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Anaphylaxis is a severe, life-threatening hypersensitivity reaction mediated by Immunoglobulin E (IgE) antibodies. When IgE binds to allergens, it triggers the release of mediators– histamine, leukotrienes, and prostaglandins from mast cells and basophils. These mediators cause vasodilation, edema, and inflammation, leading to various symptoms.The primary allergens causing anaphylaxis include food items (e.g., peanuts, shellfish), drugs (e.g., penicillin, asparaginase, corticotropin,...
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Skin Diseases and Disorders01:23

Skin Diseases and Disorders

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Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
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Granulocyte-dependent Autoantibody-induced Skin Blistering
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Drugs Causing Skin Eruptions.

Ramji Gupta, S J Pasricha

    Indian Journal of Dermatology, Venereology and Leprology
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    Summary
    This summary is machine-generated.

    This study identifies common drugs causing severe skin reactions like exanthematous eruptions and toxic epidermal necrolysis. Provocation tests confirmed causative agents, aiding in understanding drug-induced hypersensitivity.

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    Area of Science:

    • Dermatology
    • Pharmacology
    • Clinical Medicine

    Background:

    • Drug eruptions are a significant concern in clinical practice.
    • Identifying causative agents is crucial for patient management and preventing recurrence.

    Purpose of the Study:

    • To report on 21 patients with drug eruptions.
    • To identify the specific drugs responsible for various types of cutaneous adverse reactions.
    • To confirm causative drugs through provocation testing.

    Main Methods:

    • Case series reporting on 21 patients with drug eruptions.
    • Causative drugs identified and confirmed using provocation tests.
    • Categorization of eruptions into exanthematous, toxic epidermal necrolysis, exfoliative dermatitis, and urticaria.

    Main Results:

    • Thiacetazone, para-aminosalicylic acid, and isoniazid were frequently implicated in exanthematous eruptions.
    • Para-aminosalicylic acid, isoniazid, and streptomycin were associated with toxic epidermal necrolysis.
    • Multiple drug reactions were observed in some patients, highlighting complex hypersensitivity.
    • Exfoliative dermatitis and urticaria were linked to drugs including isoniazid, streptomycin, thiacetazone, chloroquine, analgin, and phenylbutazone.

    Conclusions:

    • Drug eruptions manifest in diverse forms, including exanthematous eruptions, toxic epidermal necrolysis, exfoliative dermatitis, and urticaria.
    • Provocation testing is a reliable method for confirming causative drugs in adverse cutaneous drug reactions.
    • Awareness of these drug-eruption associations is vital for clinicians to ensure patient safety and effective treatment.