Epinastine Hydrochloride

Allergic conjunctivitis (AC) is characterized by inflammatory responses in the conjunctiva and is often complicated by atopic dermatitis and mechanical irritation. Vernal keratoconjunctivitis (VKC), a severe subtype of AC, presents unique challenges in its diagnosis and management, particularly in pediatric patients. This case report describes an eight-year-old girl with VKC who exhibited poor adherence to a prescribed regimen of 0.05% epinastine ophthalmic solution and corticosteroid eye drops, resulting in persistent symptoms. Despite initial treatment, the patient's condition included giant papillae and thickened tarsal conjunctivae that were resistant to standard therapies. Upon transitioning to 0.5% epinastine eyelid cream, the patient showed improved adherence and partial symptom resolution. However, new limbal lesions, including Horner-Trantas dots, were observed following the cessation of steroid therapy. The reintroduction of steroids led to significant improvements in conjunctival lesions and complete resolution of limbal gelatinous hyperplasia. This case underscores the potential of epinastine eyelid cream in managing VKC, particularly in patients with adherence issues, and highlights the need for careful monitoring and combination therapy in severe cases. Further studies are needed to evaluate the long-term efficacy and safety of epinastine eyelid cream. However, once-daily application of eyelid cream may serve as a viable treatment and management option for pediatric patients with VKC.

The high prevalence of allergic conjunctivitis in Japan necessitates novel, easy-to-use treatment options for prophylactic use. We evaluated the safety and efficacy of a newly-developed 0.5% epinastine topical eyelid cream to prevent the development of allergic conjunctivitis.

This was a phase 3, single-centre, double-masked, intra-patient randomised trial in asymptomatic adults (aged 20–65 years) with seasonal allergic conjunctivitis in Japan.

The left and right eyes of eligible patients were randomised to receive a topical application of either 0.5% epinastine cream (~ 30 mg per dose) to one eye or placebo cream to the other (on the outer skin of the upper and lower eyelids) after a conjunctival antigen challenge (CAC) test. Symptom severity was assessed up to 24 h post-treatment. Primary efficacy endpoints were mean ocular itching and conjunctival hyperaemia severity scores in each eye; safety endpoints included adverse events (AEs) and adverse drug reaction (ADRs).

In total, 30 patients (60 eyes) were included in the study. The 0.5% epinastine topical eyelid cream reduced mean ocular itching scores (difference in least squares means ± standard error, − 1.12 ± 0.214; p < 0.0001) and mean conjunctival hyperaemia scores (− 0.54 ± 0.197; p = 0.0097) 24 h after treatment versus placebo. The 0.5% epinastine topical eyelid cream was well tolerated, with no AEs or ADRs reported.

With its novel route of administration, 0.5% epinastine topical eyelid cream may be considered a unique, easy-to-use, once-daily treatment option to prevent the onset of seasonal allergic conjunctivitis.