Otrivine Antistin Eye Drops Otrivine Antistin Eye Drops help to relieve the redness & itching caused by allergies such as hayfever, or house dust allergies. They contain two active ingredients to make your eyes feel more comfortable: Xylometazoline hydrochloride: A decongestant. Antazoline sulphate: An anti-allergic agent. Otrivine Antistin Eye Drops are suitable for adults & children over 12 years of age, but are not suitable for contact lens wearers.