TerminatedEarly Phase 1

Phosphodiesterase (PDE) Inhibitors Effect on Cognitive Deficits Associated to Schizophrenia

Stopped: Patient recruitment insufficient

Denmark5 participantsStarted 2011-06

Plain-language summary

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.

Who can participate

Age range

18 Years – 60 Years

Sex

MALE

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * Diagnosed Schizophrenia (WHO ICD 10) * Treatment stable (no regulation in medicine for 6 weeks prior) * Mono antipsychotic treatment * No regular Antidepressants (PN accepted) * No regular Benzodiazepines (PN accepted) Exclusion Criteria: * Dependence syndrome * Severe physical illness * MRI incompatible, non removable objects above shoulders

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

psychophysiology

Timeframe: 1 hour after intake of capsule with papaverine or placebo

Trial details

NCT IDNCT01813955

SponsorUniversity of Copenhagen

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2013-05

View on ClinicalTrials.gov More Schizophrenia trials