Product image of Isopto (Pilocarpine Hydrochloride) supplied by GNH India

Isopto

Active Ingredient:
Pilocarpine Hydrochloride
Origin:
EU

Isopto (Pilocarpine Hydrochloride)

Pilocarpine Hydrochloride, the active ingredient in Isopto, is a cholinergic agonist presented as an ophthalmic solution for ocular use. It is employed to lower intra‑ocular pressure in patients with various forms of glaucoma and ocular hypertension.

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

Manufacturer / TM Owner

Novartis Pharma S.A.S.

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Indications & Clinical Uses

Isopto is a cholinergic agonist used in the management of glaucoma‑related conditions, acting to improve aqueous outflow and reduce intra‑ocular pressure.

  • Open‑angle glaucoma: helps lower intra‑ocular pressure to prevent optic nerve damage.
  • Ocular hypertension: reduces elevated eye pressure in patients without optic nerve damage.
  • Acute angle‑closure glaucoma: induces rapid miosis to open the drainage angle and relieve pressure.

How It Works

  • Pilocarpine Hydrochloride binds directly to muscarinic receptors on the iris sphincter and ciliary body, causing contraction of the sphincter muscle (miosis) and relaxation of the trabecular meshwork. This enhances trabecular outflow of aqueous humor, thereby decreasing intra‑ocular pressure in glaucomatous eyes.

Side Effects

Pilocarpine eye drops may cause a range of ocular and systemic reactions. Patients should be informed of both frequent and less common events.

Common Side Effects

  • Blurred vision: transient loss of visual clarity after instillation.
  • Eye irritation or burning: mild discomfort at the application site.
  • Headache: occasional mild headache following use.
  • Brow ache: discomfort around the eyebrow region.
  • Increased tearing: excess lacrimation after dosing.
  • Conjunctival hyperemia: redness of the eye.

Serious or Rare Side Effects

  • Severe ocular inflammation: signs of uveitis or keratitis.
  • Allergic reaction: swelling, rash, or hives requiring medical attention.
  • Systemic cholinergic toxicity: nausea, vomiting, sweating, or bradycardia.
  • Persistent miosis: prolonged pupil constriction affecting vision.
  • Elevated intra‑ocular pressure paradoxically: rare worsening of pressure.

Precautions & Warnings

Before prescribing Isopto, clinicians should consider several safety aspects to minimize risk.

  • Hypersensitivity: avoid use in patients with known allergy to pilocarpine or formulation excipients.
  • Respiratory disease: use with caution in asthma or chronic obstructive pulmonary disease.
  • Cardiovascular conditions: monitor patients with bradycardia or conduction abnormalities.
  • Pregnancy and lactation: safety not established; weigh potential benefits against risks.
  • Intra‑ocular pressure monitoring: assess pressure regularly to ensure therapeutic effect.
  • Store at room temperature: keep in original container, protect from light and moisture.

Avoid Interactions

Pilocarpine may interact with other medications that influence cholinergic pathways or ocular physiology.

Major Interactions (Avoid)

  • Systemic cholinesterase inhibitors (e.g., neostigmine): additive cholinergic effects may cause toxicity.
  • Beta‑blocker eye drops: may blunt pilocarpine‑induced intra‑ocular pressure reduction.

Moderate Interactions (Monitor Closely)

  • Anticholinergic agents (e.g., atropine, antihistamines): may reduce pilocarpine efficacy.
  • MAO inhibitors: potential for enhanced autonomic effects.
  • Topical steroids: may increase risk of ocular hypertension when combined.

Frequently Asked Questions

Isopto contains pilocarpine hydrochloride and is prescribed to lower intra‑ocular pressure in patients with open‑angle glaucoma, ocular hypertension, and acute angle‑closure glaucoma. By improving aqueous humor outflow, it helps protect the optic nerve from pressure‑related damage.

Pilocarpine is a direct muscarinic receptor agonist. When applied to the eye, it stimulates the iris sphincter muscle, causing pupil constriction (miosis), and relaxes the trabecular meshwork, which increases drainage of aqueous humor and reduces intra‑ocular pressure.

The specific dosing regimen for Isopto is determined by the prescribing clinician based on the patient’s condition, response, and tolerance. The prescriber will select the appropriate number of drops and frequency according to clinical guidelines.

Safety data for pilocarpine hydrochloride in pregnancy and lactation are limited. It should only be used if the potential benefit justifies any possible risk to the fetus or infant, and the decision must be made by a qualified healthcare professional.

To request Isopto, submit an enquiry on the product page at gnhindia.com, specifying the required quantity. GNH India works with hospitals, pharmacies, and procurement teams worldwide, verifies trade or institutional credentials, and then provides pricing, availability, shipping details, and any necessary import documentation.

Isopto (pilocarpine) is a cholinergic agonist that lowers pressure by increasing trabecular outflow, whereas many other glaucoma drops, such as beta‑blockers or prostaglandin analogues, reduce aqueous production or enhance uveoscleral outflow. Choice of therapy depends on patient response, tolerance, and specific clinical factors.

Isopto should be stored at room temperature, below 25 °C, in its original container. Protect the product from excessive light and moisture to maintain stability and potency throughout its shelf life.

Isopto is applied as an ophthalmic solution. The prescribed number of drops is instilled into the affected eye(s) at the intervals directed by the prescriber, typically using a clean fingertip to gently pull down the lower eyelid and place the drop without touching the eye.

Serious risks include severe ocular inflammation, allergic reactions, systemic cholinergic toxicity (manifesting as nausea, vomiting, sweating, or bradycardia), and paradoxical increase in intra‑ocular pressure. Patients should seek immediate medical attention if they experience any of these symptoms.

Isopto is contraindicated in individuals with known hypersensitivity to pilocarpine or any formulation component. Caution is advised for patients with uncontrolled asthma, severe cardiovascular disease, or those for whom miosis may be detrimental. The prescriber will evaluate suitability on a case‑by‑case basis.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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