5.1 Not for Injection or Intraocular Administration

IHEEZO TM should not be injected or intraocularly administered.

5.2 Corneal Injury Due to Insensitivity

Patients should not touch the eye for at least 10 to 20 minutes after using anesthetic as accidental injuries can occur due to insensitivity of the eye.

5.3 Corneal Opacification

Prolonged use of a topical ocular anesthetic may produce permanent corneal opacification and ulceration with accompanying visual loss.

5.4 Risk of Contamination

Do not touch the dropper tip to any surface as this may contaminate the gel.

5.5 For Administration by Healthcare Provider

IHEEZO TM is indicated for administration under the direct supervision of a healthcare provider. IHEEZO TM is not intended for patient self-administration.

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 data described below reflect 201 patients undergoing various surgical ocular procedures in two placebo-controlled trials (Study 1 and Study 2). Patients in Study 1 were randomized to receive a single instillation of 3 drops of IHEEZO TM or placebo. Patients in Study 2 were randomized to receive a single or multiple instillations of 1, 3 or 3+3 drops of IHEEZO TM or placebo.

The most common adverse reactions in these studies, (incidence greater than or equal to 5%) following IHEEZO TM administration were mydriasis, conjunctival hyperemia and eye irritation.

Adverse Reactions Reported in Controlled Trials

Table 1. Adverse Reactions in 5% or more of IHEEZO TM Treated Patients in Studies 1 and 2

8.1 Pregnancy

Risk Summary

There are no adequate and well-controlled studies of IHEEZO TM use in pregnant women to inform a drug associated risk. There are no animal reproduction studies for chloroprocaine.

8.2 Lactation

Risk Summary

There are no data on the presence of chloroprocaine in human milk, the effects on the breastfed infant, or the effects on milk production. The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for IHEEZO TM and any potential adverse effects on the breastfed infant from IHEEZO TM.

8.4 Pediatric Use

The safety and effectiveness of IHEEZO TM have not been established in pediatric patients.

8.5 Geriatric Use

No overall differences in safety or effectiveness of IHEEZO TM have been observed between elderly and younger patients.

12.1 Mechanism of Action

12.1 Mechanism of Action

Chloroprocaine, like other local anesthetics, blocks the generation and the conduction of nerve impulses, presumably by increasing the threshold for electrical excitation in the nerve, by slowing the propagation of the nerve impulse, and by reducing the rate of rise of the action potential. In general, the progression of anesthesia is related to the diameter, myelination, and conduction velocity of affected nerve fibers. Clinically, the order of loss of nerve function is as follows: (1) pain, (2) temperature, (3) touch, (4) proprioception, and (5) skeletal muscle tone.

12.3 Pharmacokinetics

The systemic exposure to chloroprocaine following topical ocular administration of IHEEZO TM has not been studied.

Elimination

Metabolism

Chloroprocaine is metabolized by plasma pseudocholinesterases and nonspecific esterases in ocular tissues. Chloroprocaine is rapidly metabolized in plasma by hydrolysis of the ester linkage by pseudocholinesterase. The hydrolysis of chloroprocaine results in the production of ß-diethylaminoethanol and 2-chloro-4-aminobenzoic acid, which inhibits the action of the sulfonamides.

Excretion

Chloroprocaine plasma half-life in vitro is approximately 25 seconds in adults and approximately 43 seconds in neonates. The kidney is the main excretory organ for most local anesthetics and their metabolites. Urinary excretion is affected by urinary perfusion and factors affecting urinary pH.

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility

Carcinogenesis

Long-term studies in animals to evaluate carcinogenic potential of chloroprocaine have not been conducted.

Mutagenesis

2-chloroprocaine and the main metabolite, ACBA, were negative in the in vitro bacterial reverse mutation test (Ames assay) and the in vitro chromosome aberrations assay.

Impairment of Fertility

Studies in animals to evaluate the impairment of fertility have not been conducted with chloroprocaine.

14.1 Study 1 and 2

Study 1 (NCT04779606) and Study 2 (NCT04753710) were randomized, double-blinded placebo-controlled studies conducted to evaluate the efficacy, safety, and local tolerability of IHEEZO TM in 145 healthy volunteers.

In Study 1, 85 healthy male and female were randomized in a 4:1 ratio to receive a single ocular instillation of IHEEZO TM (N=68) or placebo (N=17). The double blinded treatment included a IHEEZO TM or a placebo dose of 3 drops instilled at 1 minute ± 15 seconds intervals in the right eye of each volunteer. The median age was 39 years (range 19 to 55 years); 59% female and 41% male.

In Study 2, 60 healthy male and female were randomized (40:20) to receive single or multiple ocular instillations of IHEEZO TM dose of 3 drops in the right eye. The median age was 25 years (range 18 to 59 years); 54% female ad 46% male.

The efficacy in Study 1 and 2 was determined by proportion of patients achieving full conjunctival anesthesia evaluated by conjunctival pinching, 5 minutes after administration.

Efficacy results of Study 1

The proportion of subjects with successful anesthesia was 90% in IHEEZO TM group and 12% in the placebo group (p<0.01). The median time for the IHEEZO TM group achieving anesthesia was 0.67 minutes. The median duration of anesthesia was 14.3 minutes.

Efficacy results of Study 2

The proportion of subjects with successful anesthesia was 95% in the IHEEZO TM group and 20% in the placebo group (p<0.01). The median time for the IHEEZO TM group achieving anesthesia was 0.67 minutes. The median duration of anesthesia was 19.3 minutes.

14.2 Study 3

Study 3 (NCT04685538) was a randomized, prospective, multi-center, active-controlled, observer-masked study conducted to evaluate the efficacy and safety of IHEEZO TM (N=166) versus tetracaine ophthalmic solution 0.5% (N=172) in patients undergoing cataract surgery.

The primary endpoint was defined as the proportion of patients in each treatment group gaining successful anesthesia without any supplementation. On average, patients needed 1-1.5 minutes to obtain sufficient anesthesia to successfully perform the surgical procedure which lasted on average 22 minutes.

No patient treated with IHEEZO TM required supplemental treatment to complete the intended surgical procedure.