Opthalmic Inserts

مجهول · 2009/09/06

An innovative development in the delivery of medication to the eyes

One example of such device is the ocuset system alzaInc

The insert unit is designed to provide for the release of medication at predetermined & predictable rates permitting the elimination of frequent dosing by patient ,ensuring night time medication , & providing a better means of patient compliance

The ensert is elliptical with dimentions of 13.4, 5.7 mm & 0.3 mm in thickness

The insert is flexible & multilayered structure consisting of a drug containing core surrounded on each side by a layer of copolymer memberanes through which the drug diffuses at constant rate

The rate of drug diffusion is controlled by the polymer composition , the memberane thickness , & the solubility of the drug

The devices & sterile & donot contain preservatives

Inserts containing pilocarpine are widely used in glucoma therapy
After placement in cinjunctival sac , the inserts are designed to release medication at the desired rates over a 7 days period at which time they are removed & replaced with new one

LACRISERT

mercK is another example of an opthalmic insert ; asteril translusent rod shaped , water soluble form of hydroxypropyl cellulose . the product is inserted into the inferior cul-de-sac of the eye of patients with dry eye states . The insert acts to stabilize & hicken the pre corneal tear film to delay its breakup ..Use of the insert once or twice daily is recommended . following administration ,the inserts soften & sllowly dissolve

types of ocular inserts

1.Erodible ocular insers :

Are soluble films containing the drug dispersed in a polymeric matrix
They are inserted in the cul-du-sac beneath the eyelid where they will slowly dissolve & release the drug
They increase the ocular contact time of the drug leading to increase un its absorption & prolongation in its activity
Several water soluble polymers have been used in these inserts such as sodium alginate , gelatin , polyvinyl pyrrolidine
Example of drug incorporated in these inserts are pilocarpine & antibiotic
Since these inserts are unit dose system , they contain no preservative

2. Non-erodible ocular inserts

Are soft flexible elliptical-shaped disks which are designed to be inserted in the cul-du-sac bebeath the eyelid to continuously release the drug for prolonged period of time which may reach up to 7 days
After the insert becomes exhausted of its content , it must be removed from the eye

The non-erodible insert is composed of 3 component :

a) Drug reservoir containing the drug dispersed in alginic acid matrix
b) Apolymer memberan to control the drug release & made of ethylene\vinyl acetate copolymer which is a hydrophobic polymer non irritant to the eye
c) An annular ring surrounding the drug reservoir & made of ethylene\vinyl acetate copolymer memberane impregnated with titanium dioxide to form a white border to allow visibility during handling & insertion

Pilocarpine is an example of non-erodible ocularinsert ,they have 2 forms : pilo -20 & pilo-40 ocuset which designed to release pilocarpine in the range of 20 &40 microgram\hour

dr.joan · 2009/09/06

طيب ممكن صور توضيحية ..

مجهول · 2009/09/06

Lacrisert

Marketed by:

Aton Pharma Inc (Lawrenceville, NJ)

Indication

April 23, 2008?Aton Pharma Inc announced that it launched an expanded distribution program that incorporates sampling, reimbursement assistance, and patient education resources for the dry eye medication Lacrisert (hydroxypropyl cellulose ophthalmic insert). Lacrisert is a preservative-free, once-daily, sustained-release prescription insert that helps to retain moisture, stabilize the tear film, and lubricate the eye. Lacrisert has newly designed packaging, as well as a new national drug code. Lacrisert is administered into the inferior cul-de-sac of the eye beneath the base of the tarsus. It should not be placed in

apposition to the cornea, nor beneath the eyelid at the level of the tarsal plate. Illustrated instructions are included in each packag

Dosage Form:

Ophthalmic insert: 5 mg supplied in packages of 60 sterile unit doses (each wrapped in an aluminum blister), 2 reusable applicators, and a plastic storage container to store the applicators after use

مجهول · 2009/09/06

Lacrisert

Marketed by:

Aton Pharma Inc (Lawrenceville, NJ)

Indication

April 23, 2008?Aton Pharma Inc announced that it launched an expanded distribution program that incorporates sampling, reimbursement assistance, and patient education resources for the dry eye medication Lacrisert (hydroxypropyl cellulose ophthalmic insert). Lacrisert is a preservative-free, once-daily, sustained-release prescription insert that helps to retain moisture, stabilize the tear film, and lubricate the eye. Lacrisert has newly designed packaging, as well as a new national drug code. Lacrisert is administered into the inferior cul-de-sac of the eye beneath the base of the tarsus. It should not be placed in apposition to the cornea, nor beneath the eyelid at the level of the tarsal plate. Illustrated instructions are included in each packag

Dosage Form:

Ophthalmic insert: 5 mg supplied in packages of 60 sterile unit doses (each wrapped in an aluminum blister), 2 reusable applicators, and a plastic storage container to store the applicators after use

مجهول · 2009/09/06

How To Use

To apply the system, wash hands first.
Tilt your head back, gaze upward and pull down the lower eyelid to make a pouch.
Place the system into the pouch.
Blink a few times and roll your eye to move the insert into place.
Practice inserting and removing the system in the doctor s office where you can be shown the proper technique.
Damaged or deformed systems should not be used or kept in the eye.
Replace with a new system.

Side Effects
Headache, brow ache, temporary burning or stinging, or increased mucus production may occur initially.
These effects should disappear as your body adjusts to the medication.
Inform your doctor if you develop: changes in vision, eye pain, nausea, vomiting, sweating, increased salivation, diarrhea.
Also contact your doctor if blurred vision persists more than several hours in the morning after bedtime use.
If you notice other effects not listed above, contact your doctor or pharmacist.

Precautions
Before using Ocusert Pilo-20, tell your doctor if you have: other eye problems, asthma, intestinal disease, ulcers, low or high blood pressure, heart disease, an overactive thyroid gland, seizures, Parkinson s disease.
Before having surgery with a general anesthetic, tell the doctor or dentist that you use Ocusert Pilo-20.
Use caution if driving or performing duties requiring clear vision.
Ocusert Pilo-20 may cause vision problems in poor light.
Use caution especially when driving at night.
Ocusert Pilo-20 should be used during pregnancy only if clearly needed.
It is not known if Ocusert Pilo-20 appears in breast milk.
Consult with your doctor before breast-feeding.
Do not allow anyone else to use Ocusert Pilo-20.

Missed Dose
If you should miss a dose, apply as soon as remembered unless it is almost time for the next dose.
In that case, skip the missed dose and resume your usual dosing schedule.
Do not double-up the dose to catch up.

Drug Interactions
Ocusert Pilo-20 can affect the way your body responds to other drugs.
Tell your doctor what prescription and nonprescription drugs you are taking.
Do not start or stop any medicine without doctor or pharmacist approval

مجهول · 2009/09/07

مجهول · 2009/09/07

Advantages of pilocarpine ocuserts over drops :

.

The ocusert exposes the patient to a lower amount of the drug leading to reduced side effects
The ocusert provide a continious control of the intra-ocular pressure
The ocusert is adminstered only once per week & this will imporve patient compliance
The ocusert contain no preservative so they will be suitable for patients sensitive to preservatives in opthalmic solutions

Disadvantages of pilocarpine ocuserts:

They are more expensive than drops
It may be inconvenient for the patient to retain the ocusert in the eye for the full 7 days
The ocusert must be checked periodically by the patient to see that the unit is still in place

dr.joan · 2009/09/07

موضوع قيّم جداً و انا بشكرك فعلاً أخت سارة على الإفادة ..

و بالنسبة لهل الشكل الصيدلاني لحد الآن للأسف مانزل عننا ...على حسب علمي ..

الفتاة الحالمة · 2009/09/07

دكتورة سارة بعض الصور معطوبة المصدر أو أنها تحمل رابط غير صحيح الرجاء إعادة الرفع من جديد

شكرا لك موضوع مميز

مجهول · 2009/09/07

مجهول · 2009/09/07

مرحبا بك في هذا المنتدى !

الأقسام

Opthalmic Inserts

التعليقات

مرحبا بك في هذا المنتدى !

روابط سريعة

الأقسام

Opthalmic Inserts

التعليقات