Sultamicillin, also known as CP-49952 and VD 1827, is an oral form of the antibiotic combination (codrug or mutual prodrug) ampicillin/sulbactam. It contains esterified ampicillin and sulbactam and is marketed under a number of trade names,Unasyn from Pfizer. After absorption, sultamicillin releases ampicillin and sulbactam into the system, so all the antibacterial efficacy of sultamicillin is due to ampicillin and sulbactam. Ampicillin exerts antibacterial activity against sensitive organisms by inhibiting biosynthesis of cell wall mucopeptide where as sulbactam irreversibly inhibits most important beta-lactamases that occur in resistant strains.

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.