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The Truth About Ivermectin Side Effects: Myths vs Facts
- Elizabeth Chernoby
- 6 days ago
- 4 min read
Ivermectin has become one of the most discussed medications in recent years. Originally developed to treat parasitic infections in humans and animals, it gained global attention during the COVID-19 pandemic. However, along with its popularity came confusion, misinformation, and myths — especially about its side effects.
This blog clears up the myths and presents the real facts about ivermectin’s safety, usage, and side effects, based on medical research and verified sources.
Understanding Ivermectin
Ivermectin is an antiparasitic medication used for decades to treat conditions like river blindness (onchocerciasis), strongyloidiasis, and scabies. It works by paralyzing and killing parasites and their larvae.
In humans, it’s available in tablet or topical form and is generally well-tolerated when prescribed at the correct dosage. The World Health Organization (WHO) and U.S. Food and Drug Administration (FDA) have approved ivermectin for specific parasitic diseases — not for viral infections.
Myth 1: Ivermectin Has No Side Effects
Fact: Like any medication, ivermectin can cause side effects, though most are mild and temporary. When taken in the proper dosage, serious side effects are rare, but they can occur if the drug is misused or taken in veterinary form (the version meant for animals).
Common Side Effects Include:
Nausea or stomach discomfort
Dizziness
Fatigue
Mild skin rash or itching
Diarrhea
These effects typically go away on their own as your body adjusts to the medication.
Myth 2: Ivermectin Is Safe for Everyone
Fact: Not everyone should take ivermectin. Certain individuals are at higher risk of adverse effects, especially if they have underlying health conditions or are taking specific medications.
Ivermectin Should Be Used Cautiously In:
People with liver disease, as ivermectin is metabolized in the liver.
Individuals taking blood thinners or medications that affect liver enzymes.
Pregnant or breastfeeding women (should only use under medical supervision).
Children under 15 kg (about 33 pounds).
Always consult a healthcare provider before starting ivermectin to determine if it’s safe for you.
Myth 3: Animal Ivermectin Is the Same as Human Ivermectin
Fact: This is one of the most dangerous misconceptions. Animal ivermectin is formulated for livestock like cows and horses and contains different concentrations and inactive ingredients not meant for human consumption.
Using veterinary ivermectin can lead to overdose, poisoning, or even death. The FDA has repeatedly warned against self-medicating with animal ivermectin products.
Myth 4: Ivermectin Can Cure COVID-19 Without Risk
Fact: Despite early claims, major health authorities like the FDA, WHO, and CDC have found insufficient evidence to support ivermectin as a treatment for COVID-19.
Some studies suggested potential antiviral properties, but larger clinical trials did not confirm significant benefits. Misuse of ivermectin for COVID-19 led to increased reports of side effects and poisoning cases during the pandemic.
Myth 5: Ivermectin Causes Dangerous Reactions in Everyone
Fact: Severe reactions are uncommon when ivermectin is taken under medical supervision. However, people with high parasite loads — especially in regions where certain parasitic infections are common — may experience stronger immune responses as the parasites die off.
Rare but Serious Side Effects May Include:
Low blood pressure
Rapid heartbeat
Swelling of the face or limbs
Confusion or disorientation
Severe skin rash or blistering
If any of these occur, medical attention is required immediately.
Myth 6: You Can Take Ivermectin Daily for Prevention
Fact: Ivermectin is not meant for daily or long-term preventive use. Overuse can strain the liver and lead to drug resistance in parasites. The medication should only be taken when prescribed for a specific infection and for the recommended duration.
Preventive use without a doctor’s supervision is unsafe and ineffective.
The Real Truth About Ivermectin Safety
The truth lies between the extremes. Ivermectin is neither a miracle cure nor a poison — it’s a powerful medical tool when used correctly. Decades of use have proven its safety in treating parasitic diseases, but its misuse can cause harm.
To Use Ivermectin Safely:
Only take it with a doctor’s prescription.
Avoid animal formulations.
Follow dosage instructions carefully.
Report any side effects to your healthcare provider.
Don’t use it as a substitute for proven treatments for viral infections like COVID-19.
When used responsibly, ivermectin remains one of the most valuable antiparasitic drugs in modern medicine.
Possible Drug Interactions
Ivermectin may interact with other medications that affect the nervous system or liver. Examples include:
Benzodiazepines (used for anxiety)
Barbiturates (sleep medications)
Warfarin (a blood thinner)
Some HIV or antifungal medications
Always disclose all medications you’re taking to your doctor before starting ivermectin.
Final Thoughts
Ivermectin is a scientifically valuable medicine that has saved millions of lives from parasitic diseases. However, misinformation and misuse can turn this life-saving drug into a potential hazard.
The truth is simple: when taken correctly, ivermectin is safe and effective. But using it without medical advice — especially for unapproved purposes — can be dangerous. Always rely on verified medical guidance and avoid online myths or self-prescriptions.
By separating myths from facts, we can ensure that ivermectin continues to serve its rightful purpose — improving human and animal health safely and effectively.
FAQs About Ivermectin Side Effects
Q1: What should I do if I experience side effects after taking ivermectin?
If you experience mild symptoms like nausea or dizziness, rest and hydration can help. For severe reactions such as swelling, chest pain, or confusion, seek medical help immediately.
Q2: Can ivermectin cause allergic reactions?
Yes, although rare, allergic reactions such as itching, swelling, or rash may occur. Severe allergic responses like difficulty breathing require emergency treatment.
Q3: Is ivermectin safe for elderly people?
Older adults can generally take ivermectin if prescribed, but they should be monitored closely because of possible liver function changes or interactions with other drugs.
Q4: Can ivermectin cause liver damage?
In rare cases, prolonged or high doses may affect the liver. It’s important to use ivermectin only at the prescribed dose and duration.
Q5: How can I know if I’m having an ivermectin overdose?
Symptoms of overdose include confusion, vision problems, rapid heartbeat, seizures, or severe vomiting. If any of these occur, seek emergency medical care.
Q6: Can I take ivermectin if I’m pregnant or breastfeeding?
It’s not routinely recommended during pregnancy or breastfeeding unless the potential benefit outweighs the risk. Always consult your doctor before using ivermectin.
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