Stromectol (Ivermectin) – Patient Information (Australia)

Stromectol is a brand of ivermectin, an antiparasitic medicine used to treat a range of parasitic infections. This guide explains what Stromectol is, how it works, how it behaves in the body, and what to expect when using it. It is written to be patient-friendly and to help you use the medicine safely and effectively.

Important: Always follow the directions given by your healthcare professional or the product information supplied with your medicine. If you are unsure about whether Stromectol is right for you, speak with a clinician.

1) Basic product information

• Brand name: Stromectol
• Active ingredient: ivermectin
• Type: antiparasitic (anthelmintic/antiparasitic)
• Common strengths: varies by market and manufacturer (often available as oral tablets; check the pack you receive)
• Route: oral (by mouth)
• How it’s supplied: tablets for oral use

2) How Stromectol works (mechanism of action)

Ivermectin works by targeting a parasite’s nervous system and muscle function.

• In parasites: ivermectin binds to glutamate-gated chloride channels and related ligand-gated ion channels.
• Result: it increases chloride ion flow in parasite nerve and muscle cells.
• Effect: this disrupts normal nerve signalling, causing paralysis and death of the susceptible parasite.
• In humans: ivermectin has a strong safety margin because these specific ion channels are less accessible in the human nervous system under normal conditions.

Not all parasites respond equally. The specific infection being treated determines whether ivermectin is appropriate.

3) Pharmacokinetics (what the body does to ivermectin)

Pharmacokinetics describes absorption, distribution, metabolism, and elimination.

Absorption

• Ivermectin is absorbed from the gastrointestinal tract after oral administration.
• Absorption can vary between individuals.
• Food effects: taking ivermectin with certain foods may increase absorption (details in the “Food interactions” section below).

Distribution

• After absorption, ivermectin distributes into tissues.
• It is also detectable in circulation for some time after dosing.

Metabolism

• Ivermectin is metabolised mainly in the liver.
• It is processed by drug-metabolising enzymes (commonly via cytochrome P450 pathways).

Elimination

• Excretion occurs primarily via the bile and faeces.
• Only small amounts are excreted in urine.

Half-life: The effective duration depends on the infection being treated and the parasite’s life cycle. For many treatments, repeated dosing may be used to treat later stages.

4) Typical use in Australia

Stromectol (ivermectin) is commonly used for certain parasitic infections and conditions, depending on local clinical guidance and product information. Examples include:

• Strongyloidiasis (threadworm infection due to Strongyloides species)
• Onchocerciasis (river blindness) in endemic settings (or where relevant)
• Scabies: ivermectin is sometimes used as an oral option in specific circumstances under specialist direction
• Other parasitic indications where ivermectin is considered effective by clinicians

Note: Whether ivermectin is suitable for your situation depends on the diagnosis, organism, severity, and your health status (including pregnancy and liver function).

5) When to take it (timing and dosing schedule)

Because dosing can vary by infection and patient factors, the best timing is the one given in your treatment plan or product instructions.

General timing principles

• Take the dose at the same time each day if your regimen requires multiple days.
• If a repeat dose is recommended, follow the interval exactly (commonly after about one week, but this can vary by condition and local guidance).
• Set reminders if more than one dose is planned.

How long treatment takes

• Some infections respond after a single dose, while others may require one or more repeat doses.
• Improvement can occur quickly, but complete clearance may take time as the parasite life cycle progresses.
• If symptoms persist, you may need re-evaluation.

6) Food interactions

Food can influence how much ivermectin your body absorbs.

• With food: Taking ivermectin with food may increase absorption in some people.
• Practical approach: Many patients are advised to take ivermectin with a meal to improve consistency.
• Fat content: Meals that contain more fat may increase absorption compared with an empty stomach.

Consistency matters: Try to take each dose the same way (e.g., with a similar meal) to keep absorption as steady as possible.

If your clinician recommends taking ivermectin on an empty stomach for a specific reason, follow that advice rather than general habits.

7) Alcohol and medicine interactions

Alcohol

There is no universally mandated “avoid alcohol completely” rule for ivermectin, but alcohol may affect:

• Stomach tolerance: alcohol can worsen nausea or dizziness in some people.
• Liver health: ivermectin is metabolised in the liver; heavy alcohol use can also affect the liver.

Patient-friendly guidance: For best safety, limit alcohol while taking ivermectin, especially if you have liver disease or you feel unwell.

Other medicines (interactions)

Ivermectin may interact with medicines that affect liver enzymes or transport proteins.

• Liver enzyme inducers (may reduce ivermectin levels): some anti-epileptic medicines and other enzyme-inducing agents can lower exposure.
• Liver enzyme inhibitors (may increase ivermectin levels): some antifungals and antibiotics can increase exposure and side effects.
• Medications that affect the nervous system: combining with drugs that cause sedation may increase dizziness.

Always tell your healthcare professional about all medicines and supplements you take, including herbal products and over-the-counter drugs.

8) Indications – what it may be used for

Ivermectin is used to treat certain parasitic infections and related conditions. Common indications include:

• Strongyloidiasis (Strongyloides)
• Onchocerciasis (Onchocerca volvulus)
• Scabies in selected cases (often as an oral alternative or adjunct)
• Other nematode or ectoparasite infections as assessed by clinicians

Why diagnosis matters: Different parasites require different treatments. Using ivermectin for an incorrect condition can lead to persistent symptoms and unnecessary exposure.

9) Dosing – general guidance

Dosing is individual. Ivermectin doses are commonly based on body weight and the specific condition being treated. For children, dosing is also based on weight.

Typical adult dosing approach

• Many ivermectin regimens use a weight-based dose expressed as mg per kg.
• Dosing intervals depend on the parasite’s life cycle.
• For some conditions, repeated dosing is required.

Example table: how weight-based dosing often works (illustrative)

Note: This table provides an illustrative framework for understanding weight-based dosing. Actual dosing may differ by indication and product instructions.

*Tablet count depends on the tablet strength you receive. Always count tablets based on the exact strength on your pack.

When dosing may be adjusted or avoided

• Children: dose and suitability depend on age/weight and indication.
• Liver impairment: caution may be needed; your clinician may monitor or choose an alternative.
• Pregnancy and breastfeeding: decision-making should be individualised (see safety section).
• Neurological conditions: caution is needed in certain circumstances.

If you’re unsure how to calculate your dose or how many tablets to take, consult a clinician or pharmacist rather than estimating.

10) Safety profile and side effects

Most people tolerate ivermectin well. However, side effects can occur, and risk varies by dose, infection, and individual health.

Common side effects

• Dizziness
• Nausea or stomach discomfort
• Headache
• Fatigue
• Diarrhoea
• Light rash or itching (can overlap with the underlying condition)

Serious side effects – seek urgent help

Stop using the medicine and seek urgent medical assistance if you experience:

• Severe allergic reaction (e.g., swelling of face/lips, trouble breathing, widespread hives)
• Severe or worsening neurologic symptoms (e.g., confusion, severe drowsiness, seizures)
• Severe weakness or signs of dehydration

Important note about symptom worsening

Some conditions may temporarily worsen during treatment as parasites die. This can happen in certain infections. If symptoms rapidly worsen or you are very unwell, contact a clinician promptly.

11) Practical use tips

• Take with a meal if your regimen allows, to improve absorption and reduce stomach upset.
• Complete the full course exactly as directed, including any repeat doses.
• Don’t share medication between people—dose depends on weight and diagnosis.
• Follow hygiene and household steps (especially for scabies): treat close contacts as recommended and wash bedding/clothing appropriately.
• Record the dosing dates to avoid missing the interval for repeat dosing.
• Stay hydrated if you experience gastrointestinal side effects.

12) Who should use extra caution?

Discuss ivermectin with a healthcare professional before use if you:

• Have liver disease or abnormal liver function tests
• Have a history of neurologic disorders or are taking medicines that affect the nervous system
• Are pregnant, trying to conceive, or breastfeeding
• Are travellers with suspected parasitic infections and severe symptoms

Pregnancy and breastfeeding: The risk-benefit decision is individual. Many treatments require careful consideration during pregnancy, especially in the first trimester or for certain infections. Breastfeeding guidance should be obtained from a clinician or pharmacist.

13) Alternative options

Depending on the infection and local guidance, alternative treatments may include:

• Topical therapies (for some skin conditions such as scabies), including permethrin-based treatments
• Other antiparasitic medicines that target different organisms (choice depends on confirmed or suspected pathogen)
• Supportive measures (e.g., treating itching, wound care, and household decontamination strategies)

Choosing an alternative depends on the diagnosis, severity, age, pregnancy status, and potential drug interactions. Your clinician can advise which option is most appropriate.

14) Market and legal context for Australia

In Australia, availability and supply of medicines depend on their regulatory classification and prescribing/supply requirements. Stromectol (ivermectin) may be supplied under different arrangements based on:

• Whether the medicine is listed for supply for an indication
• Medicine scheduling and regulatory rules at the time of purchase
• Healthcare involvement for certain uses
• Safety screening requirements (e.g., medical history questions)

For online pharmacy purchases, reputable services typically include information checks to help ensure correct use and safe handling of dosing instructions.

Always check the product and supply terms on the pharmacy website and retain your packaging information for reference.

15) Recent guidance (general update themes)

Guidance for antiparasitic treatment can evolve as new safety information and updated clinical recommendations are published. Recent themes commonly include:

• Confirming diagnosis where possible to ensure the right medicine and regimen
• Appropriate patient selection (e.g., caution in pregnancy, liver disease, and neurologic risk situations)
• Improved infection-control practices for conditions like scabies (treating contacts and managing bedding/clothing)
• Monitoring for interactions with liver enzyme–affected medicines

If you are using ivermectin for an infection after travel or in a complicated case, consider seeking medical review for tailored dosing and follow-up.

16) Delivery and availability

Availability of Stromectol and ivermectin formulations can vary. If supplied online, delivery typically depends on:

• Stock availability at the dispatch location
• Postcode coverage and delivery service level
• Cold-chain requirements (usually not required for tablets, but confirm for your specific product)

When ordering, ensure you check:

• Exact strength (mg per tablet)
• Pack size (number of tablets)
• Expiry date
• Delivery estimates at checkout

Storage: Keep tablets in a cool, dry place, away from direct sunlight, and out of reach of children. Store according to the label instructions.

17) FAQ

How quickly does Stromectol work?

Many people notice improvement within days, but the timing depends on the infection, severity, and whether repeat dosing is needed. Some symptoms may temporarily change as the parasite load decreases.

Do I need to take another dose later?

Often, yes—depending on the condition. Some regimens require a repeat dose about a week later to treat parasites emerging after the first treatment. Follow your specific schedule.

Can I take Stromectol on an empty stomach?

It may still work, but food can improve absorption for some people. A meal (often including some fat) may help make absorption more consistent. Follow the instructions given for your prescription or product advice.

What should I do if I miss a dose?

Check your dosing schedule. If you miss a dose, contact a pharmacist or clinician for advice on how to restart—especially if the regimen depends on an exact interval.

Is it safe to drink alcohol while taking ivermectin?

Moderate alcohol may not be an absolute contraindication for everyone, but alcohol can worsen dizziness or nausea and may burden the liver. It’s generally best to limit alcohol and seek medical advice if you drink heavily or have liver disease.

Are side effects the same for everyone?

No. Side effects vary based on dose, infection, age, body weight, other medicines, and underlying health (such as liver function). If you experience bothersome symptoms, consult a healthcare professional.

Can I use Stromectol for scabies?

Ivermectin can be used in some scabies situations under clinician guidance, particularly when topical treatments are not suitable. Household contacts and environmental hygiene measures are often just as important as the medication.

What happens if the infection is the wrong diagnosis?

If the cause isn’t susceptible to ivermectin, symptoms may not improve and treatment may delay appropriate care. If symptoms persist or worsen, seek medical review.

Does ivermectin treat tapeworms or malaria?

Ivermectin is not a general treatment for all parasites. Malaria is treated with specific antimalarial medicines. If you suspect malaria or another serious infection, seek urgent medical care.

When should I seek urgent help?

Seek urgent medical assistance if you develop signs of a severe allergic reaction, severe neurologic symptoms (such as confusion, seizures, or severe drowsiness), or you feel significantly worse after taking the medicine.

Summary

Stromectol (ivermectin) is an oral antiparasitic medicine that works by disrupting parasite nerve and muscle signalling. Its use depends on the specific infection being treated and your personal health factors. For many regimens, dosing is weight-based and may require repeat doses timed to the parasite life cycle. Taking ivermectin with a meal may improve absorption, and you should be mindful of alcohol and potential drug interactions—especially if you take other liver-metabolised medicines. If symptoms persist, worsen, or you are unsure about dosing or suitability, consult a healthcare professional.