RWJ-58643 hydrochloride is a β-trypsin inhibitor that inhibits allergic inflammation. RWJ-58643 hydrochloride (1 g) significantly reduces nasal allergy symptoms, eosinophil infiltration, and IL-5 levels at low doses. RWJ-58643 hydrochloride causes late eosinophilia and elevated IL-5 levels at high doses (300 mg and 600 mg). RWJ-58643 hydrochloride modulates allergic reactions by inhibiting the release of β-trypsin from mast cells.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.