Ivermectin Side Effects and Management

Common Side Effects

Ivermectin is generally well-tolerated at approved doses for parasitic infections, with the most common side effects being dizziness, nausea, fever, headache, muscle or joint pain, and skin reactions, while serious adverse events are rare 1
When used at standard dosing (200-250 μg/kg) for approved parasitic infections, patients typically experience mild and transient symptoms: dizziness, nausea, fever, headache, and muscle/joint pain are the most frequently reported side effects 1, 2

Patients with severe liver disease may be at increased risk for toxicity, as safety in this population is not well-established 1, 2

Topical reactions can be relieved with topical corticosteroids and oral antihistamines 1
Severe reactions in onchocerciasis may require pretreatment with corticosteroids in high-risk patients 1

Take on an empty stomach with water, as bioavailability increases 2.5-fold with high-fat food 1
Standard dosing for parasitic infections is 200-250 μg/kg 2

Moderate certainty evidence suggests ivermectin may increase the risk of serious adverse events in hospitalized patients (RR 3.10, 95% CI 0.54-17.89), though the evidence remains imprecise 3
The World Health Organization strongly recommends against ivermectin for COVID-19 outside clinical trials, noting it diverts resources from proven therapies 4