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

Study Overview
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Brief Summary
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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.

Official Title
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A Single-Center, Randomized, Double-Masked, Parallel Study Comparing the Efficacy of Pataday® Once Daily Relief Extra Strength to Claritin® Tablets 24-Hour in Reducing Ocular Itching in Subjects With Allergic Conjunctivitis

Conditions
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Allergic Conjunctivitis

Intervention / Treatment
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* Drug: olopatadine hydrochloride ophthalmic solution 0.7%
* Drug: loratadine 10 mg
* Drug: Tears Naturale
* Drug: Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Each subject must: Be at least 18 years of age at Visit 1 of either gender and any race; Provide written informed consent and sign the HIPAA form; Be willing and able to follow all instructions and attend all study visits; 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; Be able and willing to avoid all disallowed medications for the appropriate washout period and during the study (see exclusion 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; (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); Have a calculated best-corrected visual acuity of 0.7 logMAR or better in each eye as measured using an ETDRS chart; 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; 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.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Pataday® Once Daily Relief Extra Strength and Placebo tablet<br>Pataday® Once Daily Relief Extra Strength (olopatadine hydrochloride ophthalmic solution 0.7%) will be administered bilaterally and Placebo tablet will be administered orally (within 5 minutes of eyedrop) at Visits 3 and 4a. | Drug: olopatadine hydrochloride ophthalmic solution 0.7%<br>* Pataday® Once Daily Relief Extra Strength (eyedrop)<br>* Other names: Pataday® Once Daily Relief Extra Strength;Drug: Placebo<br>* Placebo tablet (tablet)<br>* Other names: Placebo tablet;|
| Active Comparator: Tears Naturale® II and Claritin® Tablet 24-Hour<br>Tears Naturale® II will be administered bilaterally and Claritin® Tablet 24-Hour (loratadine 10 mg) will be administered orally (within 5 minutes of eyedrop) at Visits 3 and 4a. | Drug: loratadine 10 mg<br>* Claritin® Tablets 24-Hour (tablet)<br>* Other names: Claritin® Tablets 24-Hour;Drug: Tears Naturale<br>* Tears Naturale® II (eyedrop)<br>* Other names: Tears Naturale® II;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 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. | 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. | 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. | 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. | 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. | 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. | 7(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 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. | 20(±1) minutes post-CAC at Visit 4b (24 hours from Visit 4a; Day 15±3) |