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Lastacaft (alcaftadine) is a prescription ophthalmic antihistamine eye drop approved for the prevention of itching associated with allergic conjunctivitis. It works by blocking histamine H1 receptors on the surface of the eye to reduce the allergic response that causes itching, redness, and tearing.

The standard dose is one drop instilled in each affected eye once daily. You should not wear contact lenses during active allergic conjunctivitis. If you do wear contact lenses, remove them before applying Lastacaft and wait at least 10 minutes before reinserting them. Follow your prescribing physician's specific instructions.

In clinical studies, Lastacaft began preventing ocular itching within minutes of administration. The protective effect lasts for up to 16 hours after a single dose, which supports its once-daily dosing schedule.

The most commonly reported side effect is mild eye irritation or burning upon instillation. Other reported effects include eye redness, eye pruritus at the application site, and headache. Serious adverse reactions are rare. Contact your physician if you experience significant discomfort or changes in vision.

Lastacaft contains benzalkonium chloride, a preservative that can be absorbed by soft contact lenses. You should remove contact lenses before instilling the drops and wait at least 10 minutes before reinserting them. Your physician can advise whether Lastacaft is appropriate given your lens-wearing habits.

Lastacaft is indicated for use during the allergy season. Long-term safety data from clinical trials support its continued use over an allergy season. Your physician will review your overall ocular health and determine an appropriate duration of treatment based on your individual circumstances.

Doctronic uses an AI-powered evaluation to gather your symptoms, medical history, and relevant information. A licensed physician then reviews your case, and if appropriate, creates a personalized treatment plan that may include a prescription sent to your preferred pharmacy. The entire process is designed to be convenient, thorough, and doctor-led.

Yes. Doctronic connects you with licensed physicians who are trained and credentialed in their states. All consultations are doctor-reviewed and audited for quality, and the platform is fully HIPAA-compliant to protect your personal health information. Doctronic is available to adults 18 and older in any U.S. state.