<prompt> An asthmatic patient is on theophylline suddenly developed infection, which of the following antibiotic should not be given to prevent side effects of theophylline?AmpicillinErythromycinCephalexinSparfloxacin  <response>: Erythromycin potentiates the effects of the following drugs by interfering with CYP-mediated metabolism of these drugs. Carbamazepine Coicosteroids Cyclosporine Digoxin Ergot alkaloids Theophylline Triazolam Valproate Warfarin Ref: MacDougall C. 2011. Chapter 55. Protein Synthesis Inhibitors and Miscellaneous Antibacterial Agents. In L.L. Brunton, B.A. Chabner, B.C. Knollmann Eds, Goodman Gilmans The Pharmacological Basis of Therapeutics, 12e. 