Latanoprost/Timolol Viatris (Timolol Maleate, Latanoprost)

Latanoprost/Timolol is used in the management of ocular conditions that require reduction of intra‑ocular pressure.

• Open‑angle glaucoma: reduces intra‑ocular pressure to slow disease progression.
• Ocular hypertension: lowers eye pressure to prevent development of glaucoma.
• Glaucoma (any type) where pressure reduction is needed: provides additive pressure‑lowering effect when monotherapy is insufficient.

• Latanoprost, a prostaglandin F2α analogue, increases uveoscleral outflow of aqueous humor by remodeling extracellular matrix in the ciliary body. Timolol maleate, a non‑selective β‑adrenergic antagonist, decreases aqueous humor production by blocking β‑receptors in the ciliary epithelium. The combined actions result in additive lowering of intra‑ocular pressure.

The following adverse reactions have been reported with Latanoprost/Timolol eye drops.

Common Side Effects

• Eye irritation or burning sensation.
• Blurred vision.
• Conjunctival hyperemia (redness).
• Increased eyelash growth.
• Darkening of the iris.
• Ocular discomfort or foreign body sensation.

Serious or Rare Side Effects

• Severe allergic reaction (e.g., angio‑edema, anaphylaxis).
• Exacerbation of asthma or chronic obstructive pulmonary disease.
• Bradycardia or hypotension.
• Systemic beta‑blocker effects such as fatigue or depression.
• Corneal ulceration or keratitis.
• Persistent intra‑ocular pressure reduction leading to hypotony.

Before prescribing Latanoprost/Timolol, clinicians should consider the following precautions.

• Assess beta‑blocker contraindications: avoid in patients with asthma, COPD, severe bradycardia, or heart block.
• Monitor intra‑ocular pressure: ensure adequate pressure reduction without causing hypotony.
• Evaluate for sulfonamide allergy if preservative contains sulfonamide.
• Do not instill other eye medications within 5 minutes of this product to prevent wash‑out.
• Store at room temperature: keep in the original container, protect from light and moisture.

Latanoprost/Timolol may interact with other medicines; relevant interactions are grouped below.

Major Interactions (Avoid)

• Systemic non‑selective beta‑blockers (e.g., propranolol): risk of additive bradycardia and hypotension.
• Sympathomimetic eye drops (e.g., epinephrine): may diminish intra‑ocular pressure‑lowering effect.
• Other ocular hypotensive agents used concurrently: risk of excessive pressure reduction (hypotony).

Moderate Interactions (Monitor Closely):\n- Calcium channel blockers: may influence ocular blood flow.

• Anticholinergic eye drops: potential effect on pupil size and accommodation.
• Topical anesthetics: increased risk of corneal toxicity when used together.