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4 studies found for:    Open Studies | "Histamine Antagonists"
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Rank Status Study
1 Recruiting Study of Using Long Acting Antihistamine to Treat Opioid Induced Itching
Condition: Pruritus
Interventions: Drug: Cetirizine;   Drug: Placebo or sugar pill
2 Recruiting A Clinical Trial Evaluating the Role of Systemic Antihistamine Therapy in the Reduction of Adverse Effects Associated With Topical 5-aminolevulinic Acid Photodynamic Therapy
Condition: Actinic Keratoses
Interventions: Drug: Antihistamine Cetirizine Hydrochloride;   Other: Placebo
3 Recruiting AWARE - Chronic Urticaria
Condition: Chronic Urticaria
Intervention:
4 Not yet recruiting Efficacy of Levocetirizine Fourfold Dosage in Chronic Spontaneous Urticaria
Condition: Chronic Spontaneous Urticaria
Interventions: Drug: Levocetirizine (as levocetirizine dihydrochloride), 5mg ( then 20 mg) per day . Oral administration.;   Drug: Levocetirizine, (as levocetirizine dihydrochloride) 20 mg ( then 5 mg) per day. Oral administration.

Study has passed its completion date and status has not been verified in more than two years.