It is available as a prescription and/or OTC medicine and is commonly used for Allergic Rhinitis, Eustachian Tube Dysfunction, Physical Urticaria, Urticaria. 1 / 6. Results 1 - 18 of 81 for " 4 H 2" Sort by Results per page 1 / 6 4H2 Cetirizine Hydrochloride Strength 10 mg Imprint 4H2 Color White Shape Oval View details HP 24 Buspirone Hydrochloride Strength 10 mg Imprint HP 24 Color White Shape Round View details 1 / 2 HH 224 Risperidone Strength 2 mg.