Clinical trial Recruiting at 1 site Interventional Ages 40 to 70

Benzhexol vs. Procyclidine for tremor in tremor-predominant Parkinson's

Official title: Comparison of Effectiveness of Benzhexol and Procyclidine in Improving Tremor in Tremor Predominant Parkinson's Disease Patients

Run by King Edward Medical University · NCT07810296 · Data updated 2026-11-12

This study tests whether benzhexol works as well as procyclidine to reduce tremor in adults with tremor-predominant Parkinson's disease who are taking levodopa.

More Parkinson Disease (PD) trials

Quick facts

Study typeInterventional
Ages40 Years to 70 Years
SexAll
Enrollment88 (estimated)
SponsorKing Edward Medical University
Academic / other
Locations1 site (Lahore, Punjab Province)
StatusRecruiting
StartedSeptember 2026
Main results expectedJuly 2027
Study endsJuly 2027
Registry record updatedSeptember 14, 2026
Trial IDNCT07810296 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults aged 40-70 with Parkinson's disease and resting tremor on levodopa/carbidopa, at Hoehn and Yahr stage 1–3, with primary tremor symptoms.

Probably not a fit

Patients with cognitive issues, significant urinary or cardiac comorbidities, or angle-closure glaucoma may not benefit and are excluded.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

In this randomized, two-arm trial, adults with tremor-predominant Parkinson's disease on levodopa will receive either benzhexol or procyclidine in addition to their usual treatment. Tremor and other motor symptoms will be measured at baseline, 2 weeks, 3 months, and 6 months using the MDS-UPDRS-III tremor subset. Dosing starts with fixed ramp-ups and may be adjusted for tremor control and tolerability. The primary aim is to see if benzhexol provides tremor relief similar to procyclidine and to compare side effects between the two drugs.

Why it matters

Potential benefit: If successful, patients could have a better tremor-control option with comparable efficacy and different side-effect profiles.

How similar studies have gone: Previous investigations in anticholinergic therapies for tremor have shown variable results; this study tests a direct comparison to determine relative efficacy and safety.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Diagnosed Parkinson's disease according to the Movement Disorder Society Clinical Diagnostic Criteria for Parkinson's Disease, with predominant tremor at presentation.
* Hoehn and Yahr stage 1, 2, or 3.
* Any gender.
* Age 40 to 70 years.
* Receiving levodopa/carbidopa monotherapy for Parkinson's disease, with resting tremor present.

Exclusion Criteria:

* Cognitive or behavioral abnormalities.
* Lower urinary tract symptoms.
* Benign prostatic hyperplasia.
* Angle-closure glaucoma.
* Cardiac disease.

Where it's running

  • Mayo Hospital Lahore
    Lahore, Punjab Province, Pakistan
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.