Travoprost Intracameral

1 INDICATIONS AND USAGE iDose ® TR (travoprost intracameral implant) is indicated for the reduction of intraocular pressure (IOP) in patients with open-angle glaucoma (OAG) or ocular hypertension (OHT). iDose ® TR is a prostaglandin analog indicated for the reduction of intraocular pressure (IOP) in patients with open-angle glaucoma (OAG) or ocular hypertension (OHT) ( 1 )

2 DOSAGE AND ADMINISTRATION For ophthalmic intracameral administration ( 2.1 ) The intracameral administration should be carried out under standard aseptic conditions ( 2.2 ) 2.1 General Dosing Information iDose TR is a travoprost delivery system consisting of a travoprost releasing implant pre-loaded in a sterile, single-dose inserter. iDose TR is administered intracamerally through a small, clear corneal incision and is anchored into the sclera at the iridocorneal angle. 2.2 Administration Instructions 1. The procedure must be carried out under aseptic conditions which include use of sterile gloves and a sterile drape. 2. The eye should be anesthetized using general, retrobulbar, peribulbar, or topical anesthesia per standard operating room procedures. 3. The iDose TR implantation procedure must be performed under magnification that allows clear visualization of the anterior chamber angle and angle structures including trabecular meshwork, with the patient's head in a stabilized position. The pupil should not be dilated prior to the procedure. 4. An intracameral miotic can be injected to deepen the angle prior to insertion of the iDose TR. 5. It is recommended that the implant surgery be performed from the temporal side, using a temporal clear corneal incision. The implant will be implanted through the angle and the trabecular meshwork into the sclera on the nasal side. 6. Remove the barrier pouch from the carton and examine for damage. Open the barrier pouch, discard the oxygen scavenger packet, and remove the blister tray with Tyvek ® lid. Open the Tyvek lid containing the iDose TR pre-loaded inserter and present to the surgeon. The iDose TR implant and single-dose inserter should be handled in the sterile field. Caution: Do not use the iDose TR if the Tyvek lid has been opened or the packaging appears damaged. 7. Prepare for gonioscopy by turning the patient's head away from the surgeon by approximately 15° to 25° and tilt the scope toward the surgeon by approximately 35°. The total combined angle should be approximately 50° to 60°. 8. Place a small amount of viscoelastic on the cornea. Position the gonioprism on the cornea using light touch gonioscopy. Adjust the microscope to locate and focus on the trabecular meshwork. 9. Inspect the angle with a gonioprism to ensure that a good view of all angle structures is available at the nasal implant location. 10. Hold the single-dose inserter with your index finger comfortably on the implant release button (see Figure 1 ) Figure 1 11. Perform a detailed inspection of the tip of the sterile inserter under magnification to ensure that the iDose TR implant is present (see Figure 2 ). Figure 2 12. Create a clear corneal incision of approximately 2.4 mm at the temporal limbus location using an instrument of the surgeon's choice. 13. Add a cohesive viscoelastic to the anterior chamber as needed to form the anterior chamber and improve visualization of the angle. Be careful not to overinflate. 14. Insertion of the implant: a. When ready for implantation, remove the safety clip which holds the release button in place by squeezing and rocking the clip backwards (see Figure 2 ). Place finger on the release button to ensure it remains in the forward position and does not prematurely release the implant. b. To smoothly enter the anterior chamber, slide the inserter tip with implant "side to side" in the incision. c. Advance to the pupillary margin and ensure there is sufficient cohesive viscoelastic on the cornea before replacing the gonioprism onto the cornea. d. Take care to avoid contact with the lens or cornea. e. Advance to the anterior chamber angle and approach the trabecular meshwork (see Figure 3 ). Figure 3 f. Press the implant directly through the trabecular meshwork, compressing the tissue until the implant anchor securely penetrates the sclera through the back wall of Schlemm's canal. The base of the implant reservoir should be firmly in contact with and compressing the trabecular meshwork. g. Once the anchor of the implant is securely embedded in sclera, pause for the tissue to relax. Carefully slide the implant release button backwards to open the inserter tip with grasper and release the implant from the inserter (see Figure 4a ). Ensuring the implant has released from the inserter grasper, slowly remove the inserter straight back (see Figure 4b ). Avoid pulling the implant out of position. Figure 4a Figure 4b h. Apply slight pressure to the sides of the implant with the tip of the inserter to ensure the implant is fully anchored into scleral tissue. Note : If for any reason the implant appears loose or disengaged from the scleral tissue after the initial implantation, slide the implant release button back to fully open the graspers. Position the graspers between the ribs on the implant and regrasp the body of the implant between the ribs by pushing the release button forward and re-implant a minimum of ½ clock hour to either side. Do not re-implant at the same location. i. Withdraw the inserter from the eye. 15. Location of iDose TR in Trabecular Meshwork a. Perform a high-magnification examination to confirm that the implant is in proper position (i.e., the proximal end rests in the anterior chamber with an unobstructed membrane) (see Figure 5 ) and securely attached with the anchor thoroughly embedded in the sclera. Figure 5 b. It is normal for an edge of the implant to make contact with the iris. Note: In a normal iris (no viscoelastic in the anterior chamber and non-constricted pupil), the iris may obstruct the view of a portion of the cap of the implant. c. Irrigate and aspirate the anterior chamber with balanced salt solution to remove all viscoelastic. Press down on the posterior edge of the incision as needed to facilitate complete removal of viscoelastic. d. Inflate the anterior chamber with saline solution as needed to achieve physiologic pressure. Figure-01 Figure-02 Figure-03 Figure-04 Figure-05 Figure-06 2.3 Evaluation and Testing Before Readministering iDose TR Perform specular microscopy to evaluate the corneal endothelium and establish pre-implantation baseline corneal endothelial cell density prior to the initial administration of iDose TR and prior to each readministration [see Warnings and Precautions (5.4) ] . Table 1 describes readministration modifications if specific adverse reactions have occurred [see Contraindications (4) , Warnings and Precautions (5.2 , 5.5) ]. Table 1: Dosage (Readministration) Modifications for Adverse Reactions Adverse Reactions Dosage Modification Ocular or periocular infections Withhold dose (readministration) Prior iDose TR device dislocation Withhold dose (readministration) Central corneal endothelial cell loss of 10% or greater from pre-administration baseline (adjusted for age-related 1% loss per year and for a 10% loss following an anterior segment surgical procedure [e.g., cataract surgery]) Withhold dose (readministration) 2.4 Readministration Instructions Note: When readministering an iDose TR implant, always remove the previous iDose TR implant AFTER implantation of the new implant. Follow "Administration Instructions" Steps 1 to 13 [see Dosage and Administration (2.2) ] . Assure the anterior chamber is fully formed with a cohesive viscoelastic. If you notice a soft eye, or a shallow anterior chamber, re-inflate. If needed, apply cohesive viscoelastic directly on the previous implant while inflating to remove any loose tissue, iris strands, or debris. Insert the new iDose TR implant following "Administration Instructions" Step 14a through 14h [see Dosage and Administration (2.2) ] . With the iDose TR inserter or viscoelastic cannula, perform a procedural check on the previous implant by gently touching it left to right, right to left, and bottom to top (iris up). Movement of the iris is suggestive of adhesions to the implant. If the previous iDose TR is adhered to the iris, slide the release button on the inserter back to fully open the graspers. Position the graspers between the ribs on the implant and regrasp the body of the implant between the ribs by pushing the release button forward. Slowly rotate the grasped implant 10° clockwise and counterclockwise. Any movement of the iris is suggestive of adhesions. Gently twist and separate the implant from any adhesions while slowly removing the implant. When satisfied that the previous iDose TR is free and clear of the iris, slowly pull the previous implant back from the trabecular meshwork avoiding tension on adjacent ocular structures and withdraw the inserter from the eye. Follow "Administration Instructions" Step 15 [see Dosage and Administration (2.2) ] . 2.5 Frequency of Readministration It is not recommended to readminister an iDose TR more than once per year.

6 ADVERSE REACTIONS The following adverse reactions are described elsewhere in the labeling: Ocular or periocular infections [see Contraindications ( 4.1 )] Corneal endothelial dystrophy [see Contraindications ( 4.2 )] Prior corneal transplantation [see Contraindications ( 4.3 )] Hypersensitivity [see Contraindications ( 4.4 )] Device dislocation [see Warnings and Precautions ( 5.2 )] Macular edema [see Warnings and Precautions ( 5.6 )] Intraocular inflammation [see Warnings and Precautions ( 5.7 )] Pigmentation [see Warnings and Precautions ( 5.8 )] Endophthalmitis [see Warnings and Precautions ( 5.9 )] In controlled studies, the most common ocular adverse reactions reported in 2% to 6% of patients were increases in intraocular pressure, iritis, dry eye, and visual field defects ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Glaukos Corporation at 1-888-404-1644 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The following adverse events rates are derived from three randomized, double-masked clinical trials in which 868 patients with open angle glaucoma (OAG) or ocular hypertension (OHT) received an iDose TR and were followed for one year. The most commonly reported ocular adverse reactions (2% to 6%) were increases in intraocular pressure, iritis, dry eye, visual field defects, eye pain, ocular hyperaemia, and reduced visual acuity. Ocular adverse reactions reported in less than 2% of patients were conjunctival hemorrhage, photophobia, punctate keratitis, blepharitis, eye irritation, corneal abrasion, device dislocation, vitreous detachment, and foreign body sensation in eyes.

12.3 Pharmacokinetics Travoprost, an isopropyl ester prodrug, is hydrolyzed by esterases in the cornea and other intraocular tissues to its biologically active free acid. Systemically, travoprost free acid is metabolized to inactive metabolites via beta-oxidation of the α (carboxylic acid) chain to give the 1,2-dinor and 1,2,3,4-tetranor analogs, via oxidation of the 15-hydroxyl moiety, as well as via reduction of the 13, 14 double bond. Data from a pharmacokinetic study of 105 subjects evaluating two models of the travoprost intracameral implant with different elution rates have shown that the plasma concentrations of travoprost free acid are below 10 pg/mL (the quantitation limit of the assay, LLOQ) in all subjects at day 10, week 12 and month 12 following administration of iDose TR.