Euphrasia officinalis (aerial parts), ethanol, filtered water
Tinctures and extracts of the herb have been used; an orally administered homeopathic product was used in 1 study evaluating effects in preventing conjunctivitis. Various homeopathic eye drops and oral formulations are available commercially. Avoid use during pregnancy and lactation. No serious adverse events were observed in a large study evaluating use of Euphrasia "pills" for prevention of conjunctivitis in students (N=994).
