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Related Concept Videos

Smallpox01:24

Smallpox

Smallpox is a severe contagious disease caused by the Variola major virus, a double-stranded DNA member of the Poxviridae family.Variola major transmission occurs primarily via inhalation of virus-laden droplets or direct contact with infectious scabs. The incubation period averages approximately seven days, although it may range from 7 to 17 days depending on the inoculum and host factors.Clinically, the prodromal phase is marked by an abrupt onset of high fever, malaise, headache, and myalgia.
Drug Toxicity: Allergic Reactions01:30

Drug Toxicity: Allergic Reactions

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 exposure to a...
Chickenpox01:20

Chickenpox

Chickenpox is an acute, highly contagious disease caused by the varicella-zoster virus (VZV), a double-stranded DNA virus belonging to the Herpesviridae family. Its transmission occurs primarily through the inhalation of respiratory droplets or direct contact with vesicular fluid from skin lesions. The incubation period typically ranges from 10 to 21 days, during which the virus replicates and disseminates through sequential phases within the host. Although generally self-limiting in children,...
Rocky Mountain Spotted Fever01:26

Rocky Mountain Spotted Fever

Rocky Mountain Spotted Fever (RMSF) is a severe tick-borne illness caused by Rickettsia rickettsii, a Gram-negative, coccobacillary bacterium. This pathogen is an obligate intracellular parasite, requiring a host cell for replication. Transmission occurs through the bite of an infected tick. In the United States, the most important vectors are Dermacentor variabilis (American dog tick) and Dermacentor andersoni (Rocky Mountain wood tick), though other tick species may also serve as vectors.
Drug toxicity: Idiosyncratic Reactions01:16

Drug toxicity: Idiosyncratic Reactions

Idiosyncratic drug reactions represent abnormal chemical responses that vary significantly among individuals, ranging from extreme sensitivity to low doses to insensitivity to high doses. These reactions often occur due to the drug's covalent binding with serum proteins, forming a foreign hapten that triggers an immunotoxicological response. The variability in drug reactions has a strong pharmacogenetic foundation, with genetic differences crucial in how individuals metabolize drugs. For...
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Antiepileptic Drugs: Potassium Channel Activators

Ezocgabine or retigabine, an antiepileptic drug of remarkable efficacy, has revolutionized the management of seizures. It is a potassium channel activator, explicitly targeting the family of Q subtype potassium channels. It enhances the transmembrane potassium currents, regulating neuronal excitability. This action stabilizes the resting membrane potential, a pivotal factor in mitigating the hyperexcitability that characterizes epilepsy.
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Related Experiment Videos

Pyrazinamide-induced maculopapular rash.

Khalid Umer Khayyam1, Faisal Imam, Manju Sharma

  • 1Department of Epidemiology and Public Health, Lala Ram Sarup Institute of TB & RD, Sri Aurobindo Marg, New Delhi - 110 030, India.

Indian Journal of Dermatology
|March 25, 2011
PubMed
Summary
This summary is machine-generated.

Pyrazinamide, a key tuberculosis drug, can rarely cause skin rashes. This case study confirms pyrazinamide as the cause of maculopapular rash, aiding in early detection and prevention of adverse drug reactions.

Keywords:
Maculopappular rashnaranjo and hartwig scales.pyrazinamide

Related Experiment Videos

Area of Science:

  • Pharmacology
  • Dermatology
  • Infectious Diseases

Background:

  • Pyrazinamide is a vital first-line drug for tuberculosis treatment.
  • While gastric issues are common, dermatological adverse drug reactions (ADRs) to pyrazinamide are infrequent.
  • Tuberculosis remains a significant global health challenge, particularly in developing nations.

Purpose of the Study:

  • To investigate and report dermatological manifestations of pyrazinamide.
  • To identify and characterize adverse drug reactions (ADRs) associated with pyrazinamide use.
  • To establish a causal link between pyrazinamide and observed dermatological reactions.

Main Methods:

  • A case study approach was employed to document a patient's reaction.
  • Structured questionnaires were utilized for data collection.
  • The Naranjo algorithm and Hartwig scale were used to assess causality, preventability, and severity of the ADR.

Main Results:

  • The patient developed a maculopapular rash during combination antituberculosis therapy.
  • Discontinuation of the suspected drug led to rash resolution.
  • Rechallenge with pyrazinamide confirmed it as the causative agent for the maculopapular rash.

Conclusions:

  • Pyrazinamide can induce rare but identifiable dermatological adverse drug reactions, specifically maculopapular rash.
  • Early detection of such reactions is crucial for patient management and adherence to tuberculosis treatment.
  • This finding supports the need for increased awareness and monitoring of pyrazinamide-induced dermatological ADRs in clinical practice.