Pemast

Pemast Uses, Dosage, Side Effects, Food Interaction and all others data.

Pemast binds to the histamine H1 receptor. This blocks the action of endogenous histamine, which subsequently leads to temporary relief of the negative symptoms brought on by histamine. Pemast has also been observed to inhibit antigen-stimulated calcium ion influx into mast cells through the blockage of calcium channels. Pemast inhibits the chemotaxis of eosinophils into ocular tissue, and prevents inflammatory mediator release from human eosinophils.

Pemast is used for the prophylactic treatment of itching of the eye associated with allergic conjunctivitis. Pemast potassium is a mast cell stabilizer that inhibits the in vivo Type I immediate hypersensitivity reaction. Pemast inhibits the antigen-induced release of inflammatory mediators (e.g., histamine, leukotriene C4, D4, E4) from human mast cells. Allergic reactions lead to cell-degranulation and the release of histamine (and other chemical mediators) from the mast cell or basophil. Once released, histamine can react with local or widespread tissues through histamine receptors. Histamine, acting on H1-receptors, produces pruritis and vasodilatation (allowing blood fluids to enter the area to cause swelling). Pemast is a histamine H1 antagonist. It competes with histamine for the normal H1-receptor sites on effector cells of blood vessels to provide effective, temporary relief of watery and itchy eyes.

Pemast
Uses
Dosage
Side Effect
Precautions
Interactions
Uses during Pregnancy
Uses during Breastfeeding
Accute Overdose
Food Interaction
Half Life
Volume of Distribution
Clearance
Interaction With other Medicine
Contradiction
Storage

Trade Name	Pemast
Generic	Pemirolast
Pemirolast Other Names	Pemirolast, Pemirolastum
Weight	0.1%
Type	Eye Drops
Formula	C₁₀H₈N₆O
Weight	Average: 228.2101 Monoisotopic: 228.075958908
Groups	Approved, Investigational
Therapeutic Class	Ophthalmic Non-Steroid drugs
Manufacturer	Opso Saline Ltd
Available Country	Bangladesh
Last Updated:	September 19, 2023 at 7:00 am

Uses

Pemast ophthalmic solution is used for the prevention of itching of the eye due to allergic conjunctivitis.

Pemast is also used to associated treatment for these conditions: Conjunctivitis allergic, Seasonal Allergic Conjunctivitis

How Pemast works

Pemast binds to the histamine H₁ receptor. This blocks the action of endogenous histamine, which subsequently leads to temporary relief of the negative symptoms brought on by histamine. Pemast has also been observed to inhibit antigen-stimulated calcium ion influx into mast cells through the blockage of calcium channels. Pemast inhibits the chemotaxis of eosinophils into ocular tissue, and prevents inflammatory mediator release from human eosinophils.

Dosage

Pemast dosage

Adult: 1 to 2 drops in each affected eye four times daily.

Pediatric Use: Safety and effectiveness in pediatric patients below the age of 3 years have not been established.

Side Effects

Burning of eye, dry eye, ocular discomfort, non ocular allergy, sinusitis, headache and sneezing or nasal congestion.

Precaution

To prevent contaminating the dropper tip and solution, do not touch the eyelids or surrounding areas with the dropper tip. Keep the bottle tightly closed when not in use Patients should be advised not to wear contact lens if their eye is red Pemast should not be used to treat contact lens related irritation Patients should wait 10 minutes after applying Pemast before they insert contact lenses

Food Interaction

No interactions found.

Half Life

4.5 hours (Ophthalmic)

Elimination Route

Following topical administration, about 10-15% of the dose was excreted unchanged in the urine.

Pregnancy & Breastfeeding use

Pregnancy: There are no adequate and well-controlled studies in pregnant women. Pemast ophthalmic solution should be used during pregnancy only if the benefit outweighs the risk.

Lactation: It is not known whether Pemast Potassium is excreted in human milk. Because many drugs are excreted in human milk, caution should be exercised when Pemast ophthalmic solution is administered to a nursing woman.