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Found 8 studies with search of: Open Studies | "Histamine Antagonists"
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1 Recruiting Study to Evaluate The Safety and Efficacy of Abatacept in Subjects With Chronic Urticaria Who Have Had an Inadequate Response to Anti-histamine Therapy
Condition: Urticaria
Intervention: Drug: abatacept (Orencia ®)
2 Recruiting Mode of Action Study of Omalizumab in Patients With Chronic Idiopathic Urticaria (CIU) Who Fail to Respond to Antihistamine Treatment
Condition: Chronic Idiopathic Urticaria
Interventions: Drug: IGE025;   Drug: Placebo to IGE025
3 Recruiting The Effects of Antihistamines on Pre-Pulse Inhibition
Condition: Healthy
Interventions: Drug: Placebo;   Drug: Meclizine
4 Recruiting Cold Urticaria Treatment With Xolair
Condition: Cold Contact Urticaria
Interventions: Drug: Omalizumab;   Drug: Placebo
5 Not yet recruiting Bepreve vs. Alrex in Subjects With Moderate to Severe Allergic Conjunctivitis
Condition: Allergic Conjunctivitis
Interventions: Drug: bepotastine besilate, 1.5%;   Drug: Loteprednol etabonate
6 Not yet recruiting Effects of Levocetirizine and Hydroxyzine on Cognitive and Psychomotor Functioning During Simulated Diving
Condition: Healthy Volunteers
Interventions: Drug: Levocetirizine;   Drug: Hydroxyzine;   Drug: Placebo
7 Recruiting Levocetirizine Plus Bed-Time Hydroxyzine in the Management of Corticodependent Chronic Urticaria Versus Both Drugs Alone in High Doses
Condition: Chronic Urticaria
Interventions: Drug: Levocetirizine;   Drug: Hydroxyzine;   Drug: Levocetirizine plus Hydroxyzine
8 Recruiting Efficacy and Safety of PRO-118 Ophthalmic Solution in Allergic Conjunctivitis
Conditions: Ocular Itching;   Ocular Allergy;   Seasonal Allergic Conjunctivitis;   Perennial Allergic Conjunctivitis;   Conjunctivitis, Allergic
Interventions: Drug: PRO-118 Ophthalmic Solution 0.015%;   Drug: PRO-118 Ophthalmic Solution 0.015 %;   Drug: PRO-118 Ophthalmic Solution 0.020 %;   Drug: Placebo Ophthalmic Solution

† Indicates status has not been verified in more than two years
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