Opexa (Bilastine)

Bilastine, the active ingredient in Opexa, is an antihistamine presented as an ophthalmic solution for ocular use. It alleviates allergic eye conditions such as seasonal allergic conjunctivitis in adults and children.

GNH USA supplies Opexa as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Bilastine is used to manage ocular allergic reactions by blocking peripheral H1 receptors.

Allergic conjunctivitis: reduces itching, redness and tearing caused by seasonal allergens. Vernal keratoconjunctivitis: provides symptomatic relief of ocular itching and inflammation. Contact lens‑induced allergic eye disease: alleviates discomfort and hyperemia.

Bilastine is generally well tolerated, but adverse reactions can occur.

Common Side Effects: - Transient ocular irritation or burning sensation. - Mild headache. - Dry eye sensation.

Serious or Rare Side Effects: - Severe allergic reaction (anaphylaxis). - Corneal edema. - Sudden vision changes or loss of visual acuity.

Bilastine should be used with attention to specific safety considerations.

Pregnancy: safety not established; consult a healthcare professional before use. Breastfeeding: unknown excretion; weigh potential benefits against risks. Renal impairment: consider dose adjustment or close monitoring. Concomitant antihistamines: avoid additive sedation or reduced efficacy. Driving or operating machinery: may cause mild drowsiness; assess personal response. Store at room temperature: keep in the original container, protect from moisture and light.

Bilastine may interact with other medicines; awareness of interaction severity is important.

Major Interactions (Avoid): - Ketoconazole: can increase systemic exposure of Bilastine. - Ritonavir: may raise Bilastine plasma levels. - Other H1 antihistamines: additive sedation or reduced therapeutic effect.

Moderate Interactions (Monitor Closely): - Alcohol: may enhance drowsiness. - CNS depressants (e.g., benzodiazepines): monitor for increased sedation. - Certain antifungal agents (e.g., itraconazole): may modestly affect Bilastine clearance.