A simple treatment for COVID-19 could be cheaper than 20 bucks — and familiar to most grade school nurses.

Head lice drug ivermectin is being explored as a potential treatment for the coronavirus following a promising new study that showed an 80% reduction in hospitalized COVID-19 patient deaths.

Just 8 out of 573 patients who received ivermectin passed away, compared to the 44 individuals out of 510 who died after being given a placebo.

An earlier study of the antiparasitic prescription drug, which costs between $17 and $43 for a course of treatment, according to GoodRx, revealed promising results in April — by removing all viral RNA within 48 hours of a single dose.

Liverpool University virologist Andrew Hill has called the new study “transformational” in the search for a coronavirus therapy.