Another reason I take Vinpocetine is to help with my MS bladder problem. It really helps the rate of flow. It seems to help the smooth muscles contract in a more efficient (non-spastic manner).
World J Urol. 2001 Nov;19(5):344-50.
Phosphodiesterase 1 inhibition in the treatment of lower urinary tract dysfunction: from bench to bedside.
Truss MC, Stief CG, Uckert S, Becker AJ, Wefer J, Schultheiss D, Jonas U.
Urologische Klinik, Medizinische Hochschule, Hannover, Germany. firstname.lastname@example.org
Anticholinergic drugs are currently the therapy of choice to treat urgency and urge incontinence. However, muscarinergic receptor blockers with adequate selectivity for detrusor smooth muscle are not available. Also, in contrast to the normal detrusor, the unstable detrusor neurotransmission seems to be at least partially regulated by non-cholinergic (NANC) pathways. These factors may explain the common side effects and the limited clinical efficacy of these compounds. Specific modulation of intracellular second messenger pathways offers the possibility of organ selective manipulation of tissue function, specifically contraction and relaxation of smooth musculature. Because of their central role in the intracellular regulation of smooth muscle tone phosphodiesterases (PDEs) are an attractive pharmacological targets. The PDE 5 specific inhibitor sildenafil (Viagra) has revolutionized the treatment of patients with erectile dysfunction. Numerous other PDE inhibitors are currently under investigation for the treatment of various disorders. We investigated the role of PDEs in human detrusor smooth muscle. Our data demonstrate the presence of five PDE isoenzymes in human detrusor and suggest, for the first time, that the cAMP pathway and the calcium/calmodulin-stimulated PDE (PDE 1) are of functional importance in the intracellular regulation in this tissue in vitro.
In addition. initial clinical data with the PDE 1 inhibitor vinpocetine in patients not responding to standard anticholinergic therapy indicate a possible role for vinpocetine in the treatment of urgency, urge incontinence and, possibly, low compliance bladder and interstitial cystitis.
The results of a larger randomized, double-blind, placebo-controlled, multicenter trial with vinpocetine show a tendency in favor of vinpocetine over placebo; however, statistically significant results were documented for one parameter only.
This might be due to the rather low dosage chosen and the small sample size. Further studies are necessary and currently underway to delineate the optimal dosage, indications and patient population. Modulation of intracellular key enzymes effecting second messenger metabolism, i.e. isoenzyme-selective PDE inhibition is a novel approach which possibly avoids the limitations of anticholinergic therapy in patients with lower urinary tract dysfunction.
PMID: 11760783 [PubMed - indexed for MEDLINE]
World J Urol. 2000 Dec;18(6):439-43.
Initial clinical experience with the selective phosphodiesterase-I isoenzyme inhibitor vinpocetine in the treatment of urge incontinence and low compliance bladder.
Truss MC, Stief CG, Uckert S, Becker AJ, Schultheiss D, Machtens S, Jonas U.
Department of Urology, Medizinische Hochschule Hannover, Germany. email@example.com
Current pharmacological treatment modalities for urge incontinence and low compliance bladder are limited by a low clinical efficacy and the significant side effects of the standard drugs available.
Previous in vitro studies indicated a possible functional relevance of the intracellular phosphodiesterase (PDE)-1 isoenzyme in the regulation of human detrusor smooth muscle contractility.
We therefore investigated the effect of the PDE-1 inhibitor vinpocetine in nonresponders to standard pharmacological therapy. In 11/19 patients (57.9%) clinical symptoms and/or urodynamic parameters were improved.
Although these initial data are preliminary, they represent the first evidence that isoenzyme-selective PDE inhibition may be a novel approach to the treatment of lower urinary tract disorders.
PMID: 11204266 [PubMed - indexed for MEDLINE]