<p>Azelastine hydrochloride Eye drops, solution is not intended for treatment of eye infections. Azelastine hydrochloride Eye drops, solution contains the preservative benzalkonium chloride. Benzalkonium chloride may cause eye irritation, especially with dry eyes or disorders of the cornea. Contact with soft contact lenses should be avoided. Contact lenses should be removed prior to application and the patient should wait at least 15 minutes before reinsertion. Known to discolour soft contact lenses.</p>