Albendazole: Patient Information for Australia
Basic Product Information
| International Nonproprietary Name (INN) | Albendazole |
|---|---|
| Australia Brand Names | Eskazole, Zentel, Albenza (imports may be available with TGA approval) |
| ATC Code | P02CA03 (Anthelmintics — Benzimidazole derivatives) |
| Available Forms and Strengths | Tablets (200 mg, 400 mg), chewable tablets (400 mg), oral suspension (200 mg/5 mL) |
| Manufacturers/Distributors | GlaxoSmithKline Australia Pty Ltd, Aspen Pharmacare Australia, various generic suppliers |
| Prescription Status in Australia | Prescription Only Medicine (Schedule 4, S4); some over-the-counter preparations for certain conditions may be available at pharmacies, but consult your pharmacist or GP. |
Mechanism of Action
For Patients: Albendazole is an antiparasitic medication, meaning it works by killing certain worms and parasites that can infect the body. It essentially starves the parasites by blocking their ability to absorb sugar (glucose), which they need to survive. Without sugar, the worms die and are then removed naturally by your body.
For Specialists: Albendazole is a benzimidazole carbamate anthelmintic. It binds to β-tubulin of susceptible helmintic parasites, inhibiting microtubule polymerisation and subsequent glucose uptake, leading to glycogen depletion and death of the parasite. It demonstrates ovicidal, larvicidal, and vermicidal activity.
Pharmacokinetics
- Absorption: Poor oral bioavailability (approx. 5%); substantially increased when taken with a fatty meal.
- Metabolism: Extensive first-pass metabolism in the liver. Albendazole sulfoxide is the main active metabolite.
- Elimination: Excreted primarily via the bile as metabolites; minor renal excretion.
- Time to Peak Concentration: 2–5 hours post-dose (fatty food enhances absorption)
- Half-Life: 8–12 hours (albendazole sulfoxide)
- Duration of Action: Depends on indication and regimen—usually days, but anti-parasitic effects can last weeks after therapy ends.
Use in Everyday Life & Best Practices
Common Uses: Albendazole is prescribed to treat a range of parasitic worm infections in Australia. Common conditions include threadworm (Enterobius), hookworm, roundworm (Ascaris), whipworm (Trichuris), strongyloidiasis, and some rarer tapeworm and liver fluke infections. It is also used in the management of hydatid disease and neurocysticercosis (tape worm infection of the brain).
Typical Dosing: The dose and length of treatment vary based on the parasite being treated, the patient’s age and health status, and the advice of your doctor. In many situations:
- For threadworm and roundworm: 400 mg as a single dose (may repeat after 2–4 weeks)
- For hookworm, whipworm: 400 mg once daily for 3 days
- For hydatid disease or neurocysticercosis: 400 mg twice daily for 28 days, repeated as advised (sometimes needs specialist involvement)
How to Use: Tablets should be swallowed whole or chewed, depending on patient preference and formulation. Suspensions should be shaken well and measured with a medicine cup or syringe. Complete the full course as prescribed, even if you feel better.
Dosing: Morning vs Evening
- Albendazole is usually taken once or twice daily.
- Morning: Taking in the morning may be easier for patients managing single-dose regimens or daily routines. Fatty breakfast can improve absorption.
- Evening: For twice-daily regimens (e.g., neurocysticercosis), spacing doses (e.g. 12 hours apart) ensures stable drug levels.
- Tip for Regularity: Take your medicine at the same time(s) each day with a main meal for best effectiveness and to help memory.
Taking with Food or on an Empty Stomach
- With Food: Albendazole is best absorbed with a fatty meal (e.g., eggs, bacon, buttered toast; full-cream milk or yoghurt).
- On an Empty Stomach: Poor absorption—avoid unless directed by your doctor for specific reasons.
- Australian Dietary Considerations: Try to take albendazole with a typical main meal that includes at least some fat, particularly breakfast or dinner. Low-fat diets may reduce effectiveness; discuss with your pharmacist or GP if concerned.
Interaction Warnings
| Interaction | Example(s) | Advice |
|---|---|---|
| Food | Fatty meals increase absorption | Take with a high-fat meal if possible |
| Alcohol | Beer, wine, spirits | No major interactions, but limit intake if on prolonged course or if liver impairment |
| Medications | Dexamethasone, cimetidine, praziquantel | May increase albendazole levels—monitor for side effects |
| Anticonvulsants | Phenytoin, carbamazepine, phenobarbital | May reduce albendazole effectiveness—dose adjustment may be needed |
| Liver enzymes | Rifampicin, St John’s Wort | May speed up elimination—consult doctor |
Indications (Uses)
| Indication | Official (TGA approved) | Off-label |
|---|---|---|
| Enterobiasis (threadworm) | Yes | No |
| Trichuriasis (whipworm) | Yes | No |
| Ascariasis (roundworm) | Yes | No |
| Hookworm | Yes | No |
| Strongyloidiasis | Yes | No |
| Hydatid disease (Echinococcus) | Yes | No |
| Neurocysticercosis | Yes | No |
| Giardiasis, other rare parasitoses | No | Yes (specialist guidance) |
Dosing According to Clinical Indications
| Condition | Adults | Children (2-12 yrs) | Elderly |
|---|---|---|---|
| Threadworm, roundworm, hookworm, whipworm | 400 mg single dose | 400 mg single dose | 400 mg single dose (monitor carefully) |
| Repeat (re-infection) | 400 mg after 2–4 weeks | 400 mg after 2–4 weeks | As above |
| Strongyloidiasis, tapeworm | 400 mg daily for 3 days | 400 mg daily for 3 days | As above |
| Hydatid disease | 400 mg twice daily for 28 days, repeat as needed | 10–15 mg/kg/day in two doses for 28 days | As above (adjust for frailty, liver function) |
| Neurocysticercosis | 400 mg twice daily for 8–30 days | 15 mg/kg/day in two doses for 8–30 days | As above (specialist supervision) |
Safety Profile and Side Effects
| Frequency | Side Effect | Comments |
|---|---|---|
| Common (>1%) | Headache, abdominal pain, nausea, vomiting, diarrhoea, dizziness | Usually mild, transient |
| Occasional (0.1–1%) | Rash, fever, reversible abnormal liver tests | Monitor with prolonged use |
| Rare (<0.1%) | Bone marrow suppression (low blood counts), serious liver injury, alopecia, seizures (if treating neurocysticercosis) | Requires urgent medical attention |
- Contraindications: Known allergy to albendazole or related drugs, pregnancy (particularly first trimester), severe liver disease
- Use in Pregnancy: Avoid, especially first trimester; seek medical advice if pregnant or planning pregnancy
- Liver Function: Prolonged/repeated courses require liver monitoring; reduce dose or discontinue if significant abnormality
- Blood Tests: May require monitoring in long-term courses
Guidelines for Proper Use (Advice for Australian Patients)
- Take albendazole exactly as directed by your doctor or pharmacist. Do not stop early unless told.
- Take with food, especially a meal with some fat content, to improve its effectiveness.
- If you miss a dose: Take as soon as remembered, unless close to the next dose. Never double-dose.
- Maintain good hygiene to prevent reinfection, such as washing hands with soap regularly, especially after using the toilet and before eating. Encourage all household contacts to do the same.
- For children, chewing the tablet or using suspension can make administration easier.
- Seek medical help if you notice unusual bruising/bleeding, yellowing of skin/eyes, severe rash, or new neurological symptoms.
- Let your GP or pharmacist know of all other medicines and supplements you are taking (including herbal remedies such as St John’s Wort).
Alternative Treatment Options (Australian PBS Listed)
- Mebendazole (Combantrin-1, Vermox): Similar effectiveness for threadworm/roundworm; may be given as a single tablet. PBS listed for some indications. Less effective for hydatid/cysticercosis.
- Pyrantel (Combantrin): Often the first-line over-the-counter option for threadworm. Not effective for all parasites covered by albendazole.
- Ivermectin: Used for strongyloidiasis if resistant or severe; specialist prescription only.
- Praziquantel: Best for tapeworms (other than Echinococcus); not for roundworm or threadworm.
Comparative Overview: Albendazole has a broader spectrum than mebendazole or pyrantel. However, each drug may be preferable depending on the infection, patient preference, cost, and local resistance profiles. Always consult your GP for the best option.
Legal, Registration and Reimbursement Status in Australia
- TGA (Therapeutic Goods Administration): Registered for use against a wide range of helminthic infections.
- Prescription Classification: S4 (prescription only) for most uses. Some over-the-counter products may be available for minor conditions—ask your pharmacist.
- PBS (Pharmaceutical Benefits Scheme): Subsidised for specific infections (hydatid disease, neurocysticercosis, strongyloidiasis)—check with your GP/pharmacist for eligibility.
- Notifiable infectious diseases (e.g., invasive tapeworm/hydatid): Certain cases may need reporting under Australian state/territory law.
Latest Research & Clinical Guidance (2022–2025)
- Recent Australian guidelines continue to recommend albendazole as first-line for common intestinal helminthiases and as an essential agent for hydatid disease and neurocysticercosis (Australian Society for Infectious Diseases, 2023).
- Emerging evidence (Lancet Inf Dis 2023) suggests improved cure rates for strongyloidiasis with combination therapy (ivermectin + albendazole) in select tropical settings.
- Updated safety guidance (Therapeutic Guidelines, eTG Complete, 2024): Monitor liver function and blood count for courses over 7 days or in at-risk groups. Use in children >2 years is well supported by international and Australian evidence.
- Department of Health (2024) highlights the value of family-wide or class-wide treatment for threadworm outbreaks in childcare or schools to reduce reinfection rates.
References: Australian Therapeutic Guidelines (eTG Complete); Lancet Infectious Diseases 2023; TGA Public Summary, PBS Schedule 2024.
Availability and Delivery
| Product | Pack Size | Typical Price (AUD) | Major City Delivery Time (Business Days) |
|---|---|---|---|
| Albendazole 400 mg tablets | 2, 5, 10, or 30 tablets | $6–$16 (1 dose) | Sydney: 1–2, Melbourne: 2–3, Brisbane: 2–3, Perth: 3–5 |
| Albendazole Suspension | 20 mL, 30 mL | $10–$22 | As above |
- Prescription may be needed. Best to order via a pharmacy with stock-on-hand—phone or check online for availability.
- Some rural/remote areas may require 1–2 days extra for courier or postal delivery.
Frequently Asked Questions (FAQ)
1. Can I take albendazole while pregnant or breastfeeding?No. Albendazole is not recommended during pregnancy, especially in the first trimester. Discuss risks with your doctor if you are pregnant or planning pregnancy. Breastfeeding should be discussed with your doctor; a brief course may be considered safe after weighing benefits/risks.
2. What should I do if I miss a dose?Take the missed dose as soon as you remember, unless it is almost time for your next scheduled dose. Do not double up to make up for missed tablets. For single-dose regimens (e.g., threadworm), the timing is less critical but take as soon as possible.
3. How do I prevent reinfection with worms in my household?Ensure all household members are treated as directed, maintain strict personal hygiene (wash hands regularly, particularly after using the toilet and before eating), daily change underwear and bedding, vacuum and clean common surfaces, and trim fingernails short.
4. Can I drink alcohol while taking albendazole?Alcohol does not directly interact with albendazole in most patients. However, limit alcohol use if you are on a long course, have liver issues, or are on other liver-metabolised medicines. When in doubt, ask your GP or pharmacist.
5. Is albendazole safe for children?Yes, albendazole is commonly used for children aged 2 years and older in Australia. For younger children, seek paediatrician or infectious diseases advice. The chewable tablet or oral suspension are easiest for young children to take.
