These and other outcomes for effectiveness of BTX-A at different dosages in two observation periods indicate that a dose greater than 50 U is significantly more effective for certain symptoms of OAB compared with placebo .
However , there were no significant differences between some dosages .
Compared with placebo , the outcomes of total adverse events for NDO and for IDO show that doses of 300 U and 200 U for NDO are associated with more complications .
Conclusions In consideration that the treatments of BTX-A were with minimal , local , and manageable adverse effects , this meta- analysis demonstrates that BTX-A 200 U is recommended for management of NDO for short-term treatment for there was no significant difference from the larger dose of 300U .
Purpose To assess the effectiveness and safety of botulinum toxin A ( BTX-A ) at different dosages for overactive bladder ( OAB ) .
Efficacy and safety of onabotulinumtoxinA for idiopathic overactive bladder: a double-blind, placebo controlled, randomized, dose ranging trial.
PURPOSE Treatment options for patients with overactive bladder refractory to anticholinergics are limited . We assessed the dose response across a range of doses of onabotulinumtoxinA ( BOTOX ® ) in patients with idiopathic overactive bladder and urinary urgency incontinence whose symptoms were not adequately managed with anticholinergics .  MATERIAL S AND METHODS In a phase 2 , multicenter , r and omized , double-blind study , 313 patients with idiopathic overactive bladder and urinary urgency incontinence experiencing 8 or more urinary urgency incontinence episodes a week and 8 or more micturitions daily at baseline received 50 , 100 , 150 , 200 or 300 U intradetrusor onabotulinumtoxinA , or placebo . Symptoms were recorded using a 7-day bladder diary . The primary efficacy variable was weekly urinary urgency incontinence episodes and the primary end point was week 12 . RESULTS Demographics and baseline characteristics were balanced across the treatment groups . Durable efficacy was observed for all onabotulinumtoxinA dose groups of 100 U or greater for primary and secondary efficacy measures , including the proportion of incontinence-free patients . When the dose response curves were analyzed , doses greater than 150 U contributed minimal additional or clinical ly relevant improvement in symptoms . This finding was also reflected in health related quality of life assessment s. Dose dependent changes in post-void residual urine volume were observed and the use of clean intermittent catheterization was also dose dependent . The only adverse events significantly greater with onabotulinumtoxinA than with placebo were urinary tract infection and urinary retention . CONCLUSIONS OnabotulinumtoxinA at doses of 100 U or greater demonstrated durable efficacy in the management of idiopathic overactive bladder and urinary urgency incontinence . A dose of 100 U may be the dose that appropriately balances the symptom benefits with the post-void residual urine volume related safety profile
These and other outcomes for effectiveness of BTX-A at different dosages in two observation periods indicate that a dose greater than 50 U is significantly more effective for certain symptoms of OAB compared with placebo .
However , there were no significant differences between some dosages .
Compared with placebo , the outcomes of total adverse events for NDO and for IDO show that doses of 300 U and 200 U for NDO are associated with more complications .
Conclusions In consideration that the treatments of BTX-A were with minimal , local , and manageable adverse effects , this meta- analysis demonstrates that BTX-A 200 U is recommended for management of NDO for short-term treatment for there was no significant difference from the larger dose of 300U .
Purpose To assess the effectiveness and safety of botulinum toxin A ( BTX-A ) at different dosages for overactive bladder ( OAB ) .