OPTISOFT REDNESS RELIEF EYE DROP ( Each ml contains Naphazdine HCL 0.005% w/v

Indications

• Nasal congestion due to colds
• Allergic rhinitis
• Sinusitis
• Eye redness due to minor irritants

Dosage

Children: Refer to specific product labeling and guidelines, as dosing may vary based on formulation and age.

Adults: Refer to specific product labeling and guidelines, as dosing may vary based on formulation.

Mechanism of action

Naphazoline exerts its effects by stimulating alpha-adrenergic receptors, primarily alpha-1 receptors, in the smooth muscle of blood vessels. This stimulation leads to vasoconstriction, which reduces blood flow to the nasal mucosa, thereby decreasing edema and congestion. It may also have some action on alpha-2 receptors, contributing to its overall sympathomimetic effects.

Pharmacodynamics

The primary pharmacodynamic effect of naphazoline is vasoconstriction, leading to reduced blood flow in the nasal mucosa. This results in decreased nasal congestion and improved airflow. The onset of action is typically rapid, providing quick relief, and the effects can last for several hours. However, prolonged use can lead to rebound congestion, a phenomenon known as rhinitis medicamentosa.

Pharmacokinetics

Naphazoline is absorbed locally when administered intranasally or ophthalmically. Systemic absorption can occur, but the extent is generally low. The drug is metabolized primarily in the liver, and its metabolites are excreted in the urine. The half-life of naphazoline is relatively short, necessitating repeated dosing for sustained effects, particularly in the case of nasal congestion.

Contra-indications

• Hypersensitivity to naphazoline or any component of the formulation
• Narrow-angle glaucoma
• Severe cardiovascular disease
• Concurrent use with monoamine oxidase inhibitors (MAOIs)

Adverse effects

• Local irritation or burning sensation in the nose
• Dryness of nasal mucosa
• Rebound congestion with prolonged use
• Increased blood pressure
• Tachycardia
• Headache
• Nausea

Interactions

• Enhanced hypertensive effect when used with other sympathomimetics
• Increased risk of adverse effects when used with MAOIs

Precautions

• Use with caution in patients with hypertension
• Caution in patients with diabetes mellitus or hyperthyroidism
• Prolonged use should be avoided to prevent rebound congestion
• Monitor patients with cardiovascular disorders closely

Pregnancy

Naphazoline is classified as pregnancy category C. Its safety in pregnancy has not been established, and it should be used only if the potential benefit justifies the potential risk to the fetus.

Breast-feeding

It is not known whether naphazoline is excreted in human milk. Caution should be exercised when administering to breastfeeding women.

Storage

Store at room temperature, away from light and moisture. Keep out of reach of children.

Formulations

• Nasal spray
• Ophthalmic solution