Podcast
Questions and Answers
What are the routes of administration for Metronidazole?
What are the routes of administration for Metronidazole?
- Oral, IV Infusion, Vaginal Gel
- Oral, IV Infusion
- Oral
- Oral, IV Infusion, Dental Gel, Rectal Suppository, Vaginal Gel (correct)
Which of the following is NOT primarily active against anaerobic bacteria?
Which of the following is NOT primarily active against anaerobic bacteria?
- Anaerobic bacteria
- Aerobic bacteria (correct)
- Helminth
- Protozoa
Which of the following is a gram-positive anaerobic bacillus?
Which of the following is a gram-positive anaerobic bacillus?
- Bacteroides fragilis
- Clostridium tetani (correct)
- Helicobacter pylori
- Fusobacterium
Nitroimidazoles have significant action against anaerobic gram-negative cocci.
Nitroimidazoles have significant action against anaerobic gram-negative cocci.
Nitroimidazoles have a significant action on aerobic gram-positive bacilli.
Nitroimidazoles have a significant action on aerobic gram-positive bacilli.
Which of the following protozoa is sensitive to Nitroimidazoles?
Which of the following protozoa is sensitive to Nitroimidazoles?
Nitroimidazoles have a significant action on Fungi.
Nitroimidazoles have a significant action on Fungi.
Nitroimidazoles have a significant action on Viruses.
Nitroimidazoles have a significant action on Viruses.
What is the mechanism of action for Metronidazole?
What is the mechanism of action for Metronidazole?
Tinidazole is more potent than Metronidazole.
Tinidazole is more potent than Metronidazole.
Tinidazole has a shorter half-life than Metronidazole.
Tinidazole has a shorter half-life than Metronidazole.
Which of the following is a common adverse drug effect of Metronidazole?
Which of the following is a common adverse drug effect of Metronidazole?
Which of the following is a less frequent adverse drug effect of Metronidazole?
Which of the following is a less frequent adverse drug effect of Metronidazole?
Metronidazole can cause a disulfiram-like reaction when taken with alcohol.
Metronidazole can cause a disulfiram-like reaction when taken with alcohol.
What is a special precaution to take when using Metronidazole?
What is a special precaution to take when using Metronidazole?
Metronidazole is the drug of choice for Amoebiasis.
Metronidazole is the drug of choice for Amoebiasis.
Metronidazole is the drug of choice for Trichomoniasis.
Metronidazole is the drug of choice for Trichomoniasis.
Metronidazole is the drug of choice for Giardiasis.
Metronidazole is the drug of choice for Giardiasis.
Metronidazole can be used to treat Pseudomembranous enterocolitis.
Metronidazole can be used to treat Pseudomembranous enterocolitis.
Metronidazole is effective against Helicobacter pylori infections when used alone.
Metronidazole is effective against Helicobacter pylori infections when used alone.
Metronidazole can be used to treat Guinea worm infestation.
Metronidazole can be used to treat Guinea worm infestation.
Metronidazole is used to treat Antibiotic-associated diarrhea in pregnancy.
Metronidazole is used to treat Antibiotic-associated diarrhea in pregnancy.
Metronidazole can be used to relieve symptoms in Irritable Bowel Syndrome (IBS).
Metronidazole can be used to relieve symptoms in Irritable Bowel Syndrome (IBS).
Tinidazole has a long half-life.
Tinidazole has a long half-life.
Tinidazole can be administered intravenously.
Tinidazole can be administered intravenously.
Flashcards
Nitroimidazoles
Nitroimidazoles
A group of drugs containing a nitroimidazole ring, effective against anaerobic bacteria and protozoa, and also show some activity against helminths.
Metronidazole
Metronidazole
The most commonly used nitroimidazole drug, available in various forms for oral, intravenous, topical, and rectal administration.
Tinidazole
Tinidazole
Another nitroimidazole drug similar to metronidazole, but with a longer half-life, requiring less frequent dosing.
Ornidazole
Ornidazole
Signup and view all the flashcards
Secnidazole
Secnidazole
Signup and view all the flashcards
Satraconazole
Satraconazole
Signup and view all the flashcards
Antimicrobial Spectrum
Antimicrobial Spectrum
Signup and view all the flashcards
Anaerobic bacteria
Anaerobic bacteria
Signup and view all the flashcards
Aerobic bacteria
Aerobic bacteria
Signup and view all the flashcards
Protozoa
Protozoa
Signup and view all the flashcards
Helminth
Helminth
Signup and view all the flashcards
Hormone
Hormone
Signup and view all the flashcards
Pharmacokinetics
Pharmacokinetics
Signup and view all the flashcards
Pharmacology
Pharmacology
Signup and view all the flashcards
Mechanism of action
Mechanism of action
Signup and view all the flashcards
Prodrug
Prodrug
Signup and view all the flashcards
Metabolism
Metabolism
Signup and view all the flashcards
Adverse drug effect
Adverse drug effect
Signup and view all the flashcards
Drug interaction
Drug interaction
Signup and view all the flashcards
Hypersensitivity
Hypersensitivity
Signup and view all the flashcards
Cellular penetration
Cellular penetration
Signup and view all the flashcards
Plasma concentration
Plasma concentration
Signup and view all the flashcards
Half-life
Half-life
Signup and view all the flashcards
Blood brain barrier penetration
Blood brain barrier penetration
Signup and view all the flashcards
Intravenous infusion
Intravenous infusion
Signup and view all the flashcards
Infected site
Infected site
Signup and view all the flashcards
Periodontitis
Periodontitis
Signup and view all the flashcards
CNS infections
CNS infections
Signup and view all the flashcards
Candida infection
Candida infection
Signup and view all the flashcards
Pseudomembranous colitis
Pseudomembranous colitis
Signup and view all the flashcards
Irritable bowel syndrome
Irritable bowel syndrome
Signup and view all the flashcards
Helicobacter pylori infection
Helicobacter pylori infection
Signup and view all the flashcards
Protein synthesis inhibitor
Protein synthesis inhibitor
Signup and view all the flashcards
Pericoronitis
Pericoronitis
Signup and view all the flashcards
Study Notes
Nitroimidazoles
- Nitroimidazoles are a group of drugs that include Metronidazole, Tinidazole, Ornidazole, Secnidazole, and Satranidazole.
Routes of Administration
- Metronidazole: Oral, IV infusion, dental gel, rectal suppository, vaginal gel
- Tinidazole: Oral, IV infusion, vaginal gel
- Ornidazole: Oral, IV infusion
- Secnidazole: Oral
- Satranidazole: Oral
Antimicrobial Spectrum
- Primarily active against anaerobic bacteria
- Bacteria:
- Anaerobic gram-positive bacilli (e.g., Clostridium tetani, Clostridium perfringens, Clostridium difficile, Clostridium septicum, Clostridium novyi, Clostridium histolyticum, Mobiluncus, Eubacterium)
- Anaerobic gram-negative bacilli (e.g., Fusobacterium, Helicobacter pylori, Bacteroides fragilis, Prevotella)
- Anaerobic gram-positive cocci (e.g., Peptococcus, Peptostreptococcus)
- Anaerobic gram-negative cocci (no significant action)
- Protozoa: Entamoeba histolytica, Giardia intestinalis, Trichomonas vaginalis, Balantidium coli, Blastocystis hominis
- Helminth: Dracunculus medinensis (Guinea worm)
- No significant action on: Fungi, Viruses
Metronidazole Mechanism of Action
- Pro drug requiring activation of the nitro group
- Nitroreductase (enzyme) reduces ferredoxin and oxidizes ferredoxin
- Active metabolite binds to DNA causing DNA fragmentation and inhibits protein synthesis
Metronidazole Pharmacokinetics
- Completely absorbed by the body
- Widely distributed in saliva, semen, liver, vaginal fluids, CSF
- High penetration across the breast milk and placenta
- Gastrointestinal irritation can be minimized by taking with food
Metronidazole Therapeutic Uses
- Dental uses: Anaerobic oral infections (e.g., ANUG, cellulitis, pericoronitis, Vincent's stomatitis, periodontitis, acute apical infections, endodontic infections)
- Aerobic and Facultative bacterial infections: Used with other antibiotics (penicillin, cephalosporins, aminoglycosides, or macrolides)
- Other uses: Amoebiasis, Trichomoniasis, Giardiasis, anaerobic bacterial infections (intraabdominal, gynecologic, dermal, CNS, bones & joints, bacterial septicemia, and endocarditis), tetanus, mixed aerobic and anaerobic infections, pseudomembranous enterocolitis, Helicobacter pylori (triple drug regimen), Dracunculiasis (Guinea worm infestation), HIV seronegative eosinophilic pustular folliculitis, antibiotic-associated diarrhea in pregnancy, irritable bowel syndrome
Tinidazole
- Long half-life, single daily dose
- Oral and IV infusion
- More potent than metronidazole
- More rapid cellular penetration and inhibition of DNA
- Higher and persistent plasma concentrations
Metronidazole Adverse Drug Effects
- Common: Headache, nausea, dry mouth, metallic taste
- Less frequent: Dizziness, vertigo, dark urine, stomatitis, paresthesias, furred tongue (due to candidiasis), neutropenia
- Urticaria, flushing, pruritis
- Prolonged treatment: Peripheral neuritis, seizures
- Drug interactions: Disulfiram-like effects, decrease metabolism/excretion of drugs like warfarin, lithium, phenytoin, cyclosporin, and 5-fluorouracil
- Special precaution: Mutagenicity, carcinogenicity, and teratogenicity in animal studies
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.