Latanoprost+timolol Macarthys Laboratories (Timolol Maleate, Latanoprost)

Latanoprost+timolol is indicated for conditions involving elevated intra‑ocular pressure, primarily within the glaucoma and ocular hypertension disease families.

• Open-angle glaucoma: reduces intra‑ocular pressure to slow optic nerve damage.
• Ocular hypertension: lowers eye pressure to prevent progression to glaucoma.
• Secondary open-angle glaucoma: helps control pressure when beta‑blocker monotherapy is insufficient.

• Latanoprost, a prostaglandin F2α analog, increases uveoscleral outflow of aqueous humor, while timolol maleate, a non‑selective beta‑adrenergic antagonist, decreases aqueous humor production by blocking beta receptors in the ciliary body. The combined actions result in a net reduction of intra‑ocular pressure.

The following adverse reactions have been reported with the combination ophthalmic solution.

Common Side Effects

• Eye irritation: mild burning or stinging after instillation.
• Blurred vision: temporary visual disturbance.
• Redness of the eye: conjunctival hyperemia.
• Itching or discomfort: ocular pruritus.
• Dry eye sensation: reduced tear film stability.
• Foreign body sensation: feeling of something in the eye.

Serious or Rare Side Effects

• Severe allergic reaction: angioedema or anaphylaxis.
• Marked bradycardia: significant slowing of heart rate.
• Bronchospasm: airway constriction, especially in asthmatic patients.
• Systemic hypotension: low blood pressure causing dizziness.
• Worsening of asthma or COPD symptoms.
• Ocular inflammation: uveitis or keratitis.

Before prescribing or dispensing, consider the following safety measures.

• Assess cardiovascular status: evaluate for bradycardia or heart block prior to use.
• Screen for respiratory disease: avoid in patients with uncontrolled asthma or severe COPD.
• Monitor for ocular allergies: discontinue if severe irritation or allergic response occurs.
• Check sulfonamide sensitivity: avoid if the formulation contains sulfonamide preservatives and the patient is allergic.
• Pregnancy and lactation: use only if the potential benefit justifies the potential risk, as safety data are limited.
• Store at room temperature: keep in the original container, protect from light and moisture.

Latanoprost+timolol may interact with other systemic or ocular medications.

Major Interactions (Avoid)

• Non‑selective beta‑blockers (e.g., propranolol): additive systemic beta‑blockade.
• Calcium channel blockers (e.g., verapamil): may enhance bradycardia.
• Other intra‑ocular pressure‑lowering agents (e.g., pilocarpine): risk of excessive pressure reduction.

Moderate Interactions (Monitor Closely)

• Systemic antihypertensives: monitor blood pressure for additive effects.
• Bronchodilators (e.g., albuterol): may reduce timolol efficacy.
• MAO inhibitors: potential for increased ocular side effects.