Ivermectin for Humans: Uses, Side Effects, Safety & How to Buy Online
- Dr. Ryan Heals, Pharm.D.
- 3 days ago
- 5 min read
Ivermectin is one of the most talked-about medicines of the past decade. First discovered in the 1970s and approved for human use by the FDA in 1987, it has since become a cornerstone treatment for several parasitic conditions affecting millions of people worldwide. It was even awarded the Nobel Prize in Physiology or Medicine in 2015 for its global impact on fighting parasitic diseases.
At TheMedicineKart, we stock a full range of generic ivermectin tablets — from 6mg to 40mg — sourced from WHO-GMP certified manufacturers. In this guide, we cover everything you need to know about ivermectin: what it treats, how it works, potential side effects, and how to buy it safely online.
What is Ivermectin Used For in Humans?
Ivermectin has several FDA-approved uses in humans. It is prescribed for the following parasitic conditions:
**Strongyloidiasis** — A roundworm infection of the intestines caused by the parasite Strongyloides stercoralis. Ivermectin is the first-line treatment for this condition.
**Onchocerciasis (River Blindness)** — A parasitic infection caused by Onchocerca volvulus, transmitted by blackfly bites. Ivermectin kills the larvae of the parasite and prevents progression of the disease.
**Scabies** — A skin infestation caused by the Sarcoptes scabiei mite. Oral ivermectin is often used for crusted (Norwegian) scabies or when topical treatments have failed.
**Head Lice (Pediculosis)** — Ivermectin lotion and oral tablets are approved for treating head lice infestations that have not responded to other treatments.
**Lymphatic Filariasis** — Used as part of mass drug administration programmes to control this mosquito-transmitted disease in tropical regions.
Browse our full range of antiparasitic medicines in our Anti Worm category.
How Does Ivermectin Work?
Ivermectin works by targeting the nervous system of parasites. It binds selectively to glutamate-gated chloride ion channels found in the nerve and muscle cells of invertebrates such as worms and mites. This binding causes the channels to open permanently, leading to:
- Increased permeability of the cell membrane
- Paralysis of the parasite's muscles
- Death of the parasite
The key reason ivermectin is safe for humans is that these specific chloride channels are not present in mammals at the blood-brain barrier, meaning the drug does not affect human nerve cells at therapeutic doses.
It is available in tablet form in multiple strengths. You can view all available strengths on our Ivermectin product page.
Ivermectin Side Effects: What to Expect
Like all medicines, ivermectin can cause side effects in some people. Most side effects are mild and temporary.
**Common side effects (affecting 1 in 10 people or more):**
- Headache
- Dizziness
- Nausea
- Diarrhoea
- Skin rash or itching
**Less common side effects:**
- Swelling of the face, hands, or feet
- Muscle or joint pain
- Fever
- Low blood pressure (especially when standing up)
**Mazzotti reaction** — In patients being treated for onchocerciasis, a reaction called the Mazzotti reaction can occur as dying parasites release toxins. Symptoms include fever, rash, joint pain, and low blood pressure. This is not an allergic reaction to ivermectin itself but to the dying parasites.
**When to seek medical help immediately:**
- Severe skin rash or blistering
- Difficulty breathing or swallowing
- Extreme dizziness or fainting
- Swelling of the lips, tongue, or throat (signs of allergic reaction)
If you experience any serious side effects, stop taking the medication and contact your doctor immediately.
Is Ivermectin Safe? Important Precautions
Ivermectin is considered safe when taken at the prescribed dose under medical supervision. However, it is not suitable for everyone.
**Do not take ivermectin if you:**
- Are pregnant or breastfeeding (consult your doctor first)
- Have a known allergy to ivermectin or any of its ingredients
- Are being treated for Loa loa (loiasis) — high worm burden can cause serious neurological reactions
**Use with caution if you:**
- Have liver disease
- Are taking blood-thinning medicines (ivermectin may interact with warfarin)
- Are under 15 kg in body weight
**Drug interactions to be aware of:**
- Warfarin — ivermectin can increase the blood-thinning effect
- Barbiturates, benzodiazepines — may increase sedative effects
- Alcohol — avoid alcohol while taking ivermectin as it may worsen side effects
Always share a complete list of your current medications with your doctor before starting ivermectin.
Generic Ivermectin vs Brand Name: Is There a Difference?
Generic ivermectin contains the same active ingredient (ivermectin) at the same strength as the original branded product. The differences are:
| | Generic Ivermectin | Brand Name |
| Active ingredient | Ivermectin | Ivermectin |
| Strength | Same | Same |
| Effectiveness | Identical | Identical |
| Manufacturer | Generic pharma | Original developer |
| Price | Up to 50% cheaper | Higher |
At TheMedicineKart, we Supply generic ivermectin manufactured by certified companies including Sun Pharma and Cipla — both WHO-GMP approved. The quality and effectiveness are identical to branded versions.
How to Buy Ivermectin Online Safely in the USA
Follow these steps to purchase ivermectin safely online:
1. **Get a prescription** — Ivermectin is a prescription medicine in the USA. Visit your doctor and ask for a prescription if you have a diagnosed parasitic condition.
2. **Choose a verified pharmacy** — Look for pharmacies that source from WHO-GMP or FDA-approved manufacturers and require a valid prescription.
3. **Send your prescription** — At TheMedicineKart, you can email your prescription to info@themedicinekart.com and our team will process your order securely.
4. **Choose your strength** — Select the correct strength based on your doctor's prescription.
5. **Fast USA delivery** — USA-to-USA orders are delivered within 4 business days. All packages are discreetly packaged with no pharmacy branding on the outside.
Frequently Asked Questions
**Can ivermectin be used for scabies?**
Yes. Oral ivermectin is an effective treatment for scabies, particularly for crusted (Norwegian) scabies or cases where topical treatments have not worked. The standard dose is 200 mcg/kg taken as a single dose, repeated after 1–2 weeks.
**How many doses of ivermectin do I need?**
For most conditions, a single dose is sufficient. However, for strongyloidiasis, two doses taken 2 weeks apart are sometimes recommended. Your doctor will prescribe the correct course for your specific condition.
**Can I take ivermectin with food?**
Ivermectin should ideally be taken on an empty stomach with a full glass of water. Taking it with a high-fat meal significantly increases the absorption of the drug, which may increase both effectiveness and the risk of side effects.
**Is ivermectin the same as Stromectol?**
Yes. Stromectol is the original brand name for ivermectin. Generic ivermectin contains the same active ingredient at the same strength and is equally effective at a lower price.
**How long does ivermectin stay in your system?**
Ivermectin has a half-life of approximately 12–16 hours in adults. It is primarily metabolised by the liver and excreted in the faeces over several days. A single dose is generally cleared from the body within 3–4 days.
*Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a licensed healthcare professional before starting, changing, or stopping any medication.*
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