Urodynamic studies performed in IC patients generally demonstrate normal cystometry, although IC patients have characteristic reductions in bladder capacity secondary to pain and hypersensitivity to bladder dilation3. In a recent retrospective study, Srinivasan et al observed that a statistically significant difference was appreciable when comparing pre and post lidocaine UDS evaluation in bladder capacity, maximum flow rate, and first strong sensation to void. 12 The impact of alkalinized lidocaine on UDS parameters, however, remains elusive and deserving of a well designed randomized control trial.