A Study Comparing the Efficacy of Pataday® Once Daily Relief Extra Strength to Claritin® Tablets 24-Hour in Subjects With Allergic Conjunctivitis

Andover Research Eye Institute58 enrolled

Overview

This is a single-center, randomized, double-masked, parallel study. In this clinical study, the efficacy comparison between Pataday® Once Daily Relief Extra Strength and Claritin® Tablets 24-Hour will be made using the Ora-CAC model, a validated clinical model accepted by regulatory agents for assessing the efficacy of products on the signs and symptoms of allergic conjunctivitis.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

DOUBLE

Enrollment

Conditions

Allergic Conjunctivitis

Interventions

olopatadine hydrochloride ophthalmic solution 0.7%DRUG

Pataday® Once Daily Relief Extra Strength (eyedrop)

loratadine 10 mgDRUG

Claritin® Tablets 24-Hour (tablet)

Tears NaturaleDRUG

Tears Naturale® II (eyedrop)

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: Each subject must: 1. Be at least 18 years of age at Visit 1 of either gender and any race; 2. Provide written informed consent and sign the HIPAA form; 3. Be willing and able to follow all instructions and attend all study visits; 4. Have a history of ocular allergies and a positive skin test reaction to a seasonal (grass, ragweed, and/or tree pollen) or perennial (cat dander, dog dander, dust mites, cockroach) allergen as confirmed by an allergic skin test conducted at Visit 1 or within the last 24 months; 5. Be able and willing to avoid all disallowed medications for the appropriate washout period and during the study (see exclusion 6); 6. Be able and willing to discontinue wearing contact lenses for at least 72 hours prior to Visit 1 and during the study trial period; 7. (for females capable of becoming pregnant) agree to have urine pregnancy testing performed at screening (must be negative) and exit visit; must not be lactating; and must agree to use a medically acceptable form of birth control throughout the study duration. Women considered capable of becoming pregnant include all females who have experienced menarche and have not experienced menopause (as defined by amenorrhea for greater than 12 consecutive months) or have not undergone successful surgical sterilization (hysterectomy, bilateral tubal ligation, or bilateral oophorectomy); 8. Have a calculated best-corrected visual acuity of 0.7 logMAR or better in each eye as measured using an ETDRS chart; 9. Have a positive bilateral post-CAC reaction (defined as having scores of ≥2 ocular itching and ≥2 conjunctival redness) within 10 (±2) minutes of instillation of the last titration of allergen at Visit 1; 10. Have a positive bilateral post-CAC reaction (defined as having scores of ≥2 ocular itching and ≥2 conjunctival redness) for at least two out of the first three time points following the challenge at Visit 2. Exclusion Criteria: Each subject must not: 1\. Have known contraindications or sensitivities to the use of the investigational product or any of its components; 2. Have any ocular condition that, in the opinion of the investigator, could affect the subject's safety or trial parameters (including but not limited to narrow angle glaucoma, clinically significant blepharitis, follicular conjunctivitis, iritis, pterygium, history of corneal transplantation or a diagnosis of dry eye); 3. Have had ocular surgical intervention within three (3) months prior to Visit 1 or during the study and/or a history of refractive surgery within the past six (6) months; 4. Have a known history of retinal detachment, diabetic retinopathy, or active retinal disease; 5. Have the presence of an active ocular infection (bacterial, viral, or fungal) or positive history of an ocular herpetic infection at any visit; 6. Use any of the following disallowed medications during the period indicated prior to Visit 1 and during the study: 7 Days * systemic or ocular H1-antihistamine, H1-antihistamine/mast cell stabilizers, H1-antihistamine-vasoconstrictor drug combinations; * decongestants; * monoamine oxidase inhibitors * all other topical ophthalmic preparations (including artificial tears) * lid scrubs; * topical prostaglandins or prostaglandin derivatives * ocular, topical, or systemic nonsteroidal anti-inflammatory drugs (NSAIDs, including baby aspirin (81 mg)) 14 Days * inhaled, ocular, topical, or systemic corticosteroids or mast cell stabilizers; 45 Days * depo-corticosteroids; Note: Currently marketed over-the-counter anti-allergy eye drops (i.e. anti-histamine/vasoconstrictor combination products such as Visine®-A®) may be administered to subjects by trained study personnel at the end of Visits 1, 2 and 4b after all evaluations are completed. 7\. Have any significant illness (e.g. any autoimmune disease requiring therapy, severe cardiovascular disease \[including arrhythmias\] the investigator feels could be expected to interfere with the subject's health or with the study parameters and/or put the subject at any unnecessary risk (includes but is not limited to: poorly controlled hypertension or poorly controlled diabetes, a history of status asthmaticus, organ transplants, a known history of persistent moderate or severe asthma, or a known history of moderate to severe allergic asthmatic reactions to any of the study allergens; 8. Have received allergy immunotherapy within the last 2 years; 9. Manifest signs or symptoms of clinically active allergic conjunctivitis in either eye at the start of Visits 1, 2, or 3 (defined as the presence of any itching or \>1 \[greater than 1\] redness in any vessel bed); 10. Have a history of glaucoma; 11. Have planned surgery (ocular or systemic) during the trial period or within 30 days after; 12. Have used an investigational drug or medical device within 30 days of the study or be concurrently enrolled in another investigational product trial; 13. Be a female who is currently pregnant, planning a pregnancy, or lactating.

Locations (1)

Andover Eye Associates

Andover, Massachusetts, United States

Outcomes

Primary Outcomes

Ocular itching 3(±1) minutes post-CAC at Visit 3

Ocular itching evaluated by the subject at 3(±1) minutes post-CAC (0-4 on the Ocular Itching scale with 4 being the worst, allowing half unit increments) at Visit 3.

Time frame: 3(±1) minutes post-CAC on Day 1 (Visit 3)

Ocular itching 3(±1) minutes post-CAC at Visit 4b

Ocular itching evaluated by the subject at 3(±1) minutes post-CAC (0-4 on the Ocular Itching scale with 4 being the worst, allowing half unit increments) at Vi sit 4b.

Time frame: 3(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Ocular itching 5(±1) minutes post-CAC at Visit 3

Ocular itching evaluated by the subject at 5(±1) minutes post-CAC (0-4 on the Ocular Itching scale with 4 being the worst, allowing half unit increments) at Visit 3.

Time frame: 5(±1) minutes post-CAC on Day 1 (Visit 3)

Ocular itching 5(±1) minutes post-CAC at Visit 4b

Ocular itching evaluated by the subject at 5(±1) minutes post-CAC (0-4 on the Ocular Itching scale with 4 being the worst, allowing half unit increments) at Visit 4b.

Time frame: 5(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Ocular itching 7(±1) minutes post-CAC at Visit 3

Ocular itching evaluated by the subject at 7(±1) minutes post-CAC (0-4 on the Ocular Itching scale with 4 being the worst, allowing half unit increments) at Visit 3.

Time frame: 7(±1) minutes post-CAC on Day 1 (Visit 3)

Ocular itching 7(±1) minutes post-CAC at Visit 4b

Ocular itching evaluated by the subject at 7(±1) minutes post-CAC (0-4 on the Ocular Itching scale with 4 being the worst, allowing half unit increments) at Visit 4b.

Time frame: 7(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Data from ClinicalTrials.gov

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Secondary Outcomes

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 3; Conjunctival Redness

Conjunctival redness evaluated by the investigator (0-4 on the Ocular Redness scale with 4 being the worst, allowing half unit increments) at Visit 3.

Time frame: 7(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 3; Conjunctival Redness

Conjunctival redness evaluated by the investigator (0-4 on the Ocular Redness scale with 4 being the worst, allowing half unit increments) at Visit 3.

Time frame: 15(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 3; Conjunctival Redness

Conjunctival redness evaluated by the investigator (0-4 on the Ocular Redness scale with 4 being the worst, allowing half unit increments) at Visit 3.

Time frame: 20(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 3; Ciliary Redness

Ciliary redness evaluated by the investigator (0-4 on the Ocular Redness scale with 4 being the worst, allowing half unit increments) at Visit 3.

Time frame: 7(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 3; Ciliary Redness

Ciliary redness evaluated by the investigator (0-4 on the Ocular Redness scale with 4 being the worst, allowing half unit increments) at Visit 3.

Time frame: 15(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 3; Ciliary Redness

Ciliary redness evaluated by the investigator (0-4 on the Ocular Redness scale with 4 being the worst, allowing half unit increments) at Visit 3.

Time frame: 20(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 3; Episcleral Redness

Episcleral redness evaluated by the investigator at Visit 3.

Time frame: 7(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 3; Episcleral Redness

Episcleral redness evaluated by the investigator (0-4 on the Ocular Redness scale with 4 being the worst, allowing half unit increments) at Visit 3.

Time frame: 15(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 3; Episcleral Redness

Episcleral redness evaluated by the investigator (0-4 on the Ocular Redness scale with 4 being the worst, allowing half unit increments) at Visit 3.

Time frame: 20(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 3; Chemosis

Chemosis evaluated by the investigator (0-4 on the Ocular Chemosis scale with 4 being the worst, allowing half unit increments) at Visit 3.

Time frame: 7(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 3; Chemosis

Chemosis evaluated by the investigator (0-4 on the Ocular Chemosis scale with 4 being the worst, allowing half unit increments) at Visit 3.

Time frame: 15(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 3; Chemosis

Chemosis evaluated by the investigator (0-4 on the Ocular Chemosis scale with 4 being the worst, allowing half unit increments) at Visit 3.

Time frame: 20(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 3; Eyelid Swelling

Eyelid swelling evaluated by the subject (0-3 on the Eyelid Swelling scale with 3 being the worst, not allowing half unit increments) at Visit 3.

Time frame: 7(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 3; Eyelid Swelling

Eyelid swelling evaluated by the subject (0-3 on the Eyelid Swelling scale with 3 being the worst, not allowing half unit increments) at Visit 3.

Time frame: 15(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 3; Eyelid Swelling

Eyelid swelling evaluated by the subject (0-3 on the Eyelid Swelling scale with 3 being the worst, not allowing half unit increments) at Visit 3.

Time frame: 20(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 3; Tearing

Tearing evaluated by the subject (0-4 on the Tearing scale with 4 being the worst, not allowing half unit increments) at Visit 3.

Time frame: 7(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 3; Tearing

Tearing evaluated by the subject (0-4 on the Tearing scale with 4 being the worst, not allowing half unit increments) at Visit 3.

Time frame: 15(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 3; Tearing

Tearing evaluated by the subject (0-4 on the Tearing scale with 4 being the worst, not allowing half unit increments) at Visit 3.

Time frame: 20(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 3; Rhinorrhea

Rhinorrhea evaluated by the subject (0-4 on the Rhinorrhea scale with 4 being the worst, not allowing half unit increments) at Visit 3.

Time frame: 7(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 3; Rhinorrhea

Rhinorrhea evaluated by the subject (0-4 on the Rhinorrhea scale with 4 being the worst, not allowing half unit increments) at Visit 3.

Time frame: 15(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 3; Rhinorrhea

Rhinorrhea evaluated by the subject (0-4 on the Rhinorrhea scale with 4 being the worst, not allowing half unit increments) at Visit 3.

Time frame: 20(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 3; Nasal Pruritis

Nasal pruritis evaluated by the subject (0-4 on the Nasal Pruritis scale with 4 being the worst, not allowing half unit increments) at Visit 3.

Time frame: 7(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 3; Nasal Pruritis

Nasal pruritis evaluated by the subject (0-4 on the Nasal Pruritis scale with 4 being the worst, not allowing half unit increments) at Visit 3.

Time frame: 15(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 3; Nasal Pruritis

Nasal pruritis evaluated by the subject (0-4 on the Nasal Pruritis scale with 4 being the worst, not allowing half unit increments) at Visit 3.

Time frame: 20(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 3; Ear or Palate Pruritis

Ear or palate pruritis evaluated by the subject (0-4 on the Ear or Palate Pruritis scale with 4 being the worst, not allowing half unit increments) at Visit 3.

Time frame: 7(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 3; Ear or Palate Pruritis

Ear or palate pruritis evaluated by the subject (0-4 on the Ear or Palate Pruritis scale with 4 being the worst, not allowing half unit increments) at Visit 3.

Time frame: 15(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 3; Ear or Palate Pruritis

Ear or palate pruritis evaluated by the subject (0-4 on the Ear or Palate Pruritis scale with 4 being the worst, not allowing half unit increments) at Visit 3.

Time frame: 20(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 3; Nasal Congestion

Nasal congestion evaluated by the subject (0-4 on the Nasal Congestion scale with 4 being the worst, not allowing half unit increments) at Visit 3.

Time frame: 7(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 3; Nasal Congestion

Nasal congestion evaluated by the subject (0-4 on the Nasal Congestion scale with 4 being the worst, not allowing half unit increments) at Visit 3.

Time frame: 15(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 3; Nasal Congestion

Nasal congestion evaluated by the subject 0-4 on the Nasal Congestion scale with 4 being the worst, not allowing half unit increments) at Visit 3.

Time frame: 20(±1) minutes post-CAC on Day 1 (Visit 3)

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 4b; Conjunctival Redness

Conjunctival redness evaluated by the investigator (0-4 on the Ocular Redness scale with 4 being the worst, allowing half unit increments) at Visit 4b.

Time frame: 7(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 4b; Conjunctival Redness

Conjunctival redness evaluated by the investigator (0-4 on the Ocular Redness scale with 4 being the worst, allowing half unit increments) at Visit 4b.

Time frame: 15(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 4b; Conjunctival Redness

Conjunctival redness evaluated by the investigator (0-4 on the Ocular Redness scale with 4 being the worst, allowing half unit increments) at Visit 4b.

Time frame: 20(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 4b; Ciliary Redness

Ciliary redness evaluated by the investigator (0-4 on the Ocular Redness scale with 4 being the worst, allowing half unit increments) at Visit 4b.

Time frame: 7(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 4b; Ciliary Redness

Ciliary redness evaluated by the investigator (0-4 on the Ocular Redness scale with 4 being the worst, allowing half unit increments) at Visit 4b.

Time frame: 15(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 4b; Ciliary Redness

Ciliary redness evaluated by the investigator (0-4 on the Ocular Redness scale with 4 being the worst, allowing half unit increments) at Visit 4b.

Time frame: 20(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 4b; Episcleral Redness

Episcleral redness evaluated by the investigator (0-4 on the Ocular Redness scale with 4 being the worst, allowing half unit increments) at Visit 4b.

Time frame: 7(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 4b; Episcleral Redness

Episcleral redness evaluated by the investigator (0-4 on the Ocular Redness scale with 4 being the worst, allowing half unit increments) at Visit 4b.

Time frame: 15(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 4b; Episcleral Redness

Episcleral redness evaluated by the investigator (0-4 on the Ocular Redness scale with 4 being the worst, allowing half unit increments) at Visit 4b.

Time frame: 20(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 4b; Chemosis

Chemosis evaluated by the investigator (0-4 on the Ocular Chemosis scale with 4 being the worst, allowing half unit increments) at Visit 4b.

Time frame: 7(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 4b; Chemosis

Chemosis evaluated by the investigator (0-4 on the Ocular Chemosis scale with 4 being the worst, allowing half unit increments) at Visit 4b.

Time frame: 15(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 4b; Chemosis

Chemosis evaluated by the investigator (0-4 on the Ocular Chemosis scale with 4 being the worst, allowing half unit increments) at Visit 4b.

Time frame: 20(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 4b; Eyelid Swelling

Eyelid swelling evaluated by the subject (0-3 on the Eyelid Swelling scale with 3 being the worst, not allowing half unit increments) at Visit 4b.

Time frame: 7(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 4b; Eyelid Swelling

Eyelid swelling evaluated by the subject (0-3 on the Eyelid Swelling scale with 3 being the worst, not allowing half unit increments) at Visit 4b.

Time frame: 15(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 4b; Eyelid Swelling

Eyelid swelling evaluated by the subject (0-3 on the Eyelid Swelling scale with 3 being the worst, not allowing half unit increments) at Visit 4b.

Time frame: 20(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 4b; Tearing

Tearing evaluated by the subject (0-4 on the Tearing scale with 4 being the worst, not allowing half unit increments) at Visit 4b.

Time frame: 7(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 4b; Tearing

Tearing evaluated by the subject (0-4 on the Tearing scale with 4 being the worst, not allowing half unit increments) at Visit 4b.

Time frame: 15(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 4b; Tearing

Tearing evaluated by the subject (0-4 on the Tearing scale with 4 being the worst, not allowing half unit increments) at Visit 4b.

Time frame: 20(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 4b; Rhinorrhea

Rhinorrhea evaluated by the subject (0-4 on the Rhinorrhea scale with 4 being the worst, not allowing half unit increments) at Visit 4b.

Time frame: 7(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 4b; Rhinorrhea

Rhinorrhea evaluated by the subject (0-4 on the Rhinorrhea scale with 4 being the worst, not allowing half unit increments) at Visit 4b.

Time frame: 15(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 4b; Rhinorrhea

Rhinorrhea evaluated by the subject (0-4 on the Rhinorrhea scale with 4 being the worst, not allowing half unit increments) at Visit 4b.

Time frame: 20(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 4b; Nasal Pruritis

Nasal pruritis evaluated by the subject (0-4 on the Nasal Pruritis scale with 4 being the worst, not allowing half unit increments) at Visit 4b.

Time frame: 7(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 4b; Nasal Pruritis

Nasal pruritis evaluated by the subject (0-4 on the Nasal Pruritis scale with 4 being the worst, not allowing half unit increments) at Visit 4b.

Time frame: 15(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 4b; Nasal Pruritis

Nasal pruritis evaluated by the subject (0-4 on the Nasal Pruritis scale with 4 being the worst, not allowing half unit increments) at Visit 4b.

Time frame: 20(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 4b; Ear or Palate Pruritis

Ear or palate pruritis evaluated by the subject (0-4 on the Ear or Palate Pruritis scale with 4 being the worst, not allowing half unit increments) at Visit 4b.

Time frame: 7(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 4b; Ear or Palate Pruritis

Ear or palate pruritis evaluated by the subject (0-4 on the Ear or Palate Pruritis scale with 4 being the worst, not allowing half unit increments) at Visit 4b.

Time frame: 15(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 4b; Ear or Palate Pruritis

Ear or palate pruritis evaluated by the subject (0-4 on the Ear or Palate Pruritis scale with 4 being the worst, not allowing half unit increments) at Visit 4b.

Time frame: 20(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 7(±1) minutes post-CAC at Visit 4b; Nasal Congestion

Nasal congestion pruritis evaluated by the subject (0-4 on the Nasal Congestion scale with 4 being the worst, not allowing half unit increments) at Visit 4b.

Time frame: 7(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 15(±1) minutes post-CAC at Visit 4b; Nasal Congestion

Nasal congestion pruritis evaluated by the subject (0-4 on the Nasal Congestion scale with 4 being the worst, not allowing half unit increments) at Visit 4b.

Time frame: 15(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)

Secondary Efficacy Measures 20(±1) minutes post-CAC at Visit 4b; Nasal Congestion

Nasal congestion pruritis evaluated by the subject (0-4 on the Nasal Congestion scale with 4 being the worst, not allowing half unit increments) at Visit 4b.

Time frame: 20(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3)