Papaverine Hydrochloride, USP, is the hydrochloride of an alkaloid obtained from opium or prepared synthetically. It belongs to the benzylisoquinoline group of alkaloids. It does not contain a phenanthrene group as do morphine and codeine.
Papaverine is recommended in various conditions accompanied by spasm of smooth muscle, such as vascular spasm associated with acute myocardial infarction (coronary occlusion), angina pectoris, peripheral and pulmonary embolism, peripheral vascular disease in which there is a vasospastic element, or certain cerebral angiospastic states; and visceral spasm, as in ureteral, biliary, or gastrointestinal colic.
Published Studies Related to Papaverine
Randomized controlled trial investigating the effect of transcervical papaverine
and bupivacaine on postoperative analgesia following laparoscopic sterilization. 
placebo... CONCLUSIONS: From the data presented, we would not recommend routine
Combination therapy for erectile dysfunction: a randomized, double blind,
unblinded active-controlled, cross-over study of the pharmacodynamics and safety
of combined oral formulations of apomorphine hydrochloride, phentolamine mesylate
and papaverine hydrochloride in men with moderate to severe erectile dysfunction. 
Oral therapy has become first line treatment for patients with mild to moderate
erectile dysfunction (ED). Studies have shown that sildenafil may not be
effective in all patients, and has been associated with a variety of adverse
effects and an adverse interaction with nitrates and inhibitors of cytochrome
The use of papaverine in arterial sheaths to prevent loss of femoral artery pulse
in pediatric cardiac catheterization. 
This study evaluated the efficacy of intraarterial papaverine infusion after
pediatric cardiac catheterization in reducing the incidence of lost pulse. This
study was conducted at a teaching pediatric hospital and was designed as a
randomized, prospective, double-blind, placebo-controlled study... The results indicated that intraarterial papaverine infusion
after femoral artery catheterization does not prevent loss of pulse in the
catheterized artery, and decreased pulsatility index correlates with diminished
pulse and represents a good noninvasive method of evaluating femoral artery
patency and flow.
Double-blind, randomized, controlled trial of papaverine-containing infusions to
prevent failure of arterial catheters in pediatric patients. 
risk of catheter failure... CONCLUSION: In critically ill children, infusion of papaverine-containing fluids
Objective double-blind evaluation of erectile function with intracorporeal
papaverine in combination with phentolamine and/or prostaglandin E1. 
We performed a double-blind, crossover study using objective measurements to
compare maximum rigidity and duration of erections with papaverine hydrochloride
in combination with phentolamine mesylate and/or prostaglandin E1. The rationale
for the protocol was to combine a smooth muscle relaxant (papaverine) with either
or both vasodilating agents (phentolamine and prostaglandin E1) commonly used for
Clinical Trials Related to Papaverine
Phosphodiesterase (PDE) Inhibitors Effect on Cognitive Deficits Associated to Schizophrenia [Terminated]
Phosphodiesterase (PDE) inhibitors represent a new group of potential antipsychotic
compounds currently under development. One of these is papaverine, an inhibitor of the PDE
10 family. The class of PDE10 inhibitors have been reported as possible candidates in the
treatment of schizophrenia, and may prove an attractive antipsychotic alternative due to the
many side-effects of the currently available antipsychotics. It has been proposed from
preclinical studies that PDE10 inhibitors have the potential to reduce cognitive deficits in
schizophrenia and these findings need to be confirmed in a human population, in view of the
fact that no other currently registered drug posses these unique properties.
The currently proposed project is designed to investigate whether the PDE10 inhibitor
Papaverine indeed have the capacity to reduce cognitive deficits in schizophrenia patients.
In order to accomplish this effect, Papaverine will be investigated in schizophrenia, with
regards to symptomatology, hemodynamic, neurocognition and early information-processing.
The Impact of Papaverine on First Stage of Labor [Not yet recruiting]
In the investigators institution, there is a wide use of Papaverine in delivery room, but
this use is optional, and is left to the discretion of the physician.
The aim of the investigators study is to prospectively evaluate the influence of Papaverine
administration in the latent phase of labor, on the duration of labor.
Pharmacokinetics of Pavaverine After Intraluminal Administration [Completed]
Nerve-Sparing Radical Prostatectomy With or Without Nerve Grafting Followed by Standard Therapy for Erectile Dysfunction in Treating Patients With Localized Prostate Cancer [Completed]
RATIONALE: Nerve-sparing radical prostatectomy with nerve grafting followed by standard
therapies for erectile dysfunction may be effective in helping patients with prostate cancer
improve sexual satisfaction and quality of life. It is not yet known whether erectile
dysfunction therapy and nerve-sparing prostatectomy are more effective with or without nerve
PURPOSE: This randomized phase II trial is studying nerve grafting and standard therapy to
see how well they work compared to standard therapy alone in treating erectile dysfunction
in patients undergoing nerve-sparing radical prostatectomy for localized prostate cancer.
Pelvic Angiography in Non-Responders to Phosphodiesterase-5 Inhibitors (PANPI) [Completed]
The specific aim of this pilot study is to describe the angiographic prevalence and pattern
of internal pudendal artery (and associated inflow vessel) atherosclerosis in patients with
erectile dysfunction who are non-responsive to PDE-5 inhibitors (i. e., Viagra) who are
referred for clinically-indicated cardiac catheterization.
Page last updated: 2013-02-10