Ketotifen in Over-the-Counter Products is a Contact Allergen

Aschenbeck KA , Warshaw EM . Periorbital allergic contact dermatitis due to ketotifen. Dermatitis, 2017; 28(2):–.

DeBord L , Enos T , Cruz P Jr . A subtle historical clue unlocks a contact puzzle. Dermatitis, 2019; 30(1):77.

Aoki J. Allergic contact dermatitis due to eye drops. Their clinical features and the patch test results [in Japanese]. Nihon Ika Daigaku Zasshi, 1997; 64(3):232–237.

Niizeki H , Inamoto N , Nakamura K , et al. Contact dermatitis from ketotifen fumarate eyedrops. Contact Dermatitis. 1994; 31(4):266.

Smets K , Werbrouck J , Goossens A , et al. Sensitization from ketotifen fumarate in eye drops presenting as chronic conjunctivitis. Contact Dermatitis. 2017; 76(2):124–6.

Blackwell W , Cruz P. Ketotifen in over-the-counter products is a contact allergen. Dermatitis, 2020; 31(4).

Rowan B . FDA approves prescription Zaditor for over-the-counter relief from itchy eyes. American Association for the Advancement of Science. 2006. Available at: https://www.eurekalert.org/pub_releases/2006-10/rfpr-fap102006.php. Accessed November 18, 2019.

Pall B , Gomes P , Yi F , et al. Management of ocular allergy itch with an antihistamine-releasing contact lens. Cornea, 2019; 38(6):713–717.