Albendazole dosage for a patient weighing 120 kg who had expired cheese which tasted bitter
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albendazole dosage adult weight based 120 kg capped dose helminth
Clinical Interpretation
Bitter-tasting expired cheese is the classic clue for Trichinella spiralis (trichinellosis) - expired/spoiled pork or meat products (including cheese made with contaminated products) that taste bitter due to putrefaction. This is the standard exam scenario.
Albendazole Dosage for This Patient (120 kg)
The 60 kg threshold is the key cutoff:
| Weight | Dose |
|---|---|
| < 60 kg | 15 mg/kg/day in 2 divided doses (max 800 mg/day) |
| ≥ 60 kg (your patient at 120 kg) | 400 mg TWICE daily (fixed flat dose) |
Since this patient weighs 120 kg (≥ 60 kg), the dose is the fixed flat dose:
Albendazole 400 mg orally TWICE daily, taken with meals
Duration by Indication
| Condition | Duration |
|---|---|
| Trichinellosis (intestinal phase) | 8-14 days (400 mg BID) |
| Neurocysticercosis | 8-30 days |
| Hydatid disease (Echinococcosis) | 28-day cycles x 3 (with 14-day breaks) |
| Simple helminths (roundworm, hookworm) | Single 400 mg dose |
Key Points
- 120 kg is ≥ 60 kg - so NO weight-based calculation needed; flat 400 mg BID applies
- The maximum dose is 800 mg/day - this patient is already at max with 400 mg BID
- Must be taken with a fatty meal to improve absorption (albendazole is poorly absorbed fasted)
- For trichinellosis, corticosteroids may be added if there is myositis or severe symptoms
- Monitor liver function tests during therapy (hepatotoxicity risk)
Sources: Mayo Clinic albendazole dosing | Goodman & Gilman's Pharmacological Basis of Therapeutics | Katzung's Basic & Clinical Pharmacology, 16th Ed.
Taenia solium or general helminth exposure treatment
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Excellent data from Goldman-Cecil. Here is a comprehensive answer:
Taenia solium & General Helminth Treatment
Understanding the Two Forms of T. solium Infection
Taenia solium causes two distinct diseases requiring different treatments:
| Form | How acquired | Disease | Treatment |
|---|---|---|---|
| Intestinal tapeworm (adult worm) | Eating undercooked pork with cysticerci | Taeniasis | Praziquantel or Niclosamide |
| Cysticercosis/Neurocysticercosis | Ingesting T. solium eggs (fecal-oral) | Cysts in brain/muscle/eye | Albendazole ± Praziquantel |
1. Intestinal Tapeworm (Taenia solium - adult worm)
Drug of choice: Praziquantel
| Drug | Dose | Administration |
|---|---|---|
| Praziquantel | 5-10 mg/kg | Single oral dose |
| Niclosamide | 2 g (4 tablets) adults | Single dose, tablets must be chewed |
| Nitazoxanide | 500 mg | Twice daily x 3 days |
- For a 120 kg patient: Praziquantel = 5-10 mg/kg → 600 mg - 1200 mg as a single dose
- Niclosamide is preferred in pregnancy (no known mutagenic effects)
2. Neurocysticercosis (cysts in CNS)
Drug of choice: Albendazole (preferred over praziquantel - 20% more cysticidal activity)
| Drug | Dose | Duration |
|---|---|---|
| Albendazole | 400 mg BID (≥60 kg) | 8-30 days |
| Praziquantel (alternative) | 50-100 mg/kg/day in 3 divided doses | 2 weeks |
| Albendazole + Praziquantel combined | Standard doses of both | Multiple cysts - improves efficacy |
Always add:
- Corticosteroids (dexamethasone) - to reduce inflammation from dying cysts
- Anticonvulsants - if seizures present
3. General Helminth Treatment Summary (Exam-Ready)
| Organism | Drug of Choice | Dose |
|---|---|---|
| Taenia solium (intestinal) | Praziquantel | 5-10 mg/kg single dose |
| Taenia saginata (beef tapeworm) | Praziquantel or Niclosamide | Same as above |
| Hymenolepis nana (dwarf tapeworm) | Praziquantel | 15-25 mg/kg single dose |
| Neurocysticercosis | Albendazole | 400 mg BID x 8-30 days |
| Hydatid disease (Echinococcus) | Albendazole | 400 mg BID x 28-day cycles |
| Ascaris (roundworm) | Albendazole / Mebendazole | 400 mg single dose |
| Hookworm | Albendazole | 400 mg single dose |
| Trichinella (trichinellosis) | Albendazole | 400 mg BID x 8-14 days |
| Cutaneous larva migrans | Ivermectin | Single dose |
| Strongyloides | Ivermectin | Single dose |
| Filariasis | Diethylcarbamazine (DEC) | Weight-based |
Key Exam Points
- Praziquantel = DOC for all intestinal cestodes (tapeworms)
- Albendazole = DOC for tissue cestodes (cysticercosis, hydatid) and most nematodes
- Niclosamide = safe in pregnancy for intestinal tapeworm; kills only worm in lumen (no systemic effect)
- Never use praziquantel alone for neurocysticercosis with ocular cysts - may worsen inflammation and destroy the eye
- Albendazole has 20% more cysticidal activity than praziquantel for neurocysticercosis
Sources: Goldman-Cecil Medicine, International Edition | Katzung's Basic & Clinical Pharmacology, 16th Ed | Washington Manual of Medical Therapeutics
BID means?
BID stands for "Bis In Die" - Latin for "Twice a Day"
So Albendazole 400 mg BID = 400 mg taken twice daily (once in the morning, once in the evening - ideally 12 hours apart, with a fatty meal).
Common Latin Prescription Abbreviations
| Abbreviation | Latin | Meaning |
|---|---|---|
| OD / QD | Omni Die | Once daily |
| BID / BD | Bis In Die | Twice a day |
| TID / TDS | Ter In Die | Three times a day |
| QID / QDS | Quater In Die | Four times a day |
| HS | Hora Somni | At bedtime |
| AC | Ante Cibum | Before meals |
| PC | Post Cibum | After meals |
| PRN | Pro Re Nata | As needed |
| SOS | Si Opus Sit | If necessary (single extra dose) |
| STAT | Statim | Immediately |
| PO | Per Os | By mouth (orally) |
Albendazole dosage in adult and course and duration
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Here is the complete, textbook-sourced reference for Albendazole dosing in adults:
Albendazole - Adult Dosage, Course & Duration
Dosing Rule (Weight-Based Threshold)
- < 60 kg → 15 mg/kg/day in 2 divided doses (max 800 mg/day)
- ≥ 60 kg → Fixed flat dose (as below) - no weight calculation needed
Complete Dosage Table by Infection
| Infection | Dose | Frequency | Duration | With/Without Food |
|---|---|---|---|---|
| Ascariasis (roundworm) | 400 mg | Single dose | 1 day (repeat 2-3 days if heavy) | Empty stomach |
| Hookworm | 400 mg | Once daily | 3 days | Empty stomach |
| Trichuriasis (whipworm) | 400 mg | Once daily | 3 days | Empty stomach |
| Pinworm (Enterobius) | 400 mg | Single dose | 1 day, repeat in 2 weeks | Empty stomach |
| Taeniasis (intestinal tapeworm) | 400 mg | Once daily | 3 days | Empty stomach |
| Cutaneous Larva Migrans | 400 mg | Once daily | 3 days | Empty stomach |
| Visceral Larva Migrans (Toxocariasis) | 400 mg | Twice daily | 5 days | With fatty meal |
| Trichinellosis | 400 mg | Twice daily | 8-14 days (1-2 weeks) | With fatty meal |
| Strongyloides (alternative) | 400 mg | Twice daily | 7 days | With fatty meal |
| Intestinal Capillariasis | 400 mg | Once daily | 10 days | Empty stomach |
| Microsporidiosis | 400 mg | Twice daily | 2 weeks or longer | With fatty meal |
| Gnathostomiasis | 400 mg | Twice daily | 3 weeks | With fatty meal |
| Clonorchiasis | 400 mg | Twice daily | 1 week | With fatty meal |
| Neurocysticercosis | 400 mg | Twice daily | 8-30 days (up to 21 days) | With fatty meal |
| Hydatid disease (Echinococcus) | 400 mg | Twice daily | 28-day cycles x 3 (14-day break between cycles); can extend to 6 months | With fatty meal |
Critical Administration Rules
| Rule | Detail |
|---|---|
| Intestinal parasites | Take on empty stomach (limits absorption - local gut effect only needed) |
| Tissue/systemic parasites | Take with fatty meal (fat dramatically increases absorption - systemic effect needed) |
| Max daily dose | 800 mg/day for most indications |
| Pregnancy | Contraindicated (teratogenic in animals) |
| Monitor LFTs | Especially during prolonged courses (hepatotoxicity risk) |
Memory Aid
"1-3-7-14-28" - the key durations to remember:
- 1 day - Ascaris, Pinworm (single dose)
- 3 days - Hookworm, Whipworm, Taeniasis, Cutaneous LM
- 7 days - Strongyloides, Clonorchiasis
- 14 days - Trichinellosis, Microsporidiosis (minimum)
- 28 days (cyclic) - Hydatid disease
Sources: Katzung's Basic & Clinical Pharmacology 16th Ed | Goldman-Cecil Medicine International Edition | Tintinalli's Emergency Medicine
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