Comparing Atenolol and Ivabradine for Heart Rate Issues in Schizophrenia Patients on Clozapine

Effect Of Atenolol Versus Ivabradine On Heart Rate Variability In Treatment Resistant Schizophrenia Patients On Clozapine With Tachycardia: A Randomized Control Trial.

Not applicable Interventional All India Institute of Medical Sciences, Bhubaneswar · NCT06505668

This study is testing whether Atenolol or Ivabradine can better help people with schizophrenia who are on clozapine and have a fast heart rate.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment40 (estimated)
Ages18 Years to 60 Years
SexAll
SponsorAll India Institute of Medical Sciences, Bhubaneswar Academic / other
Locations1 site (Bhubaneswar, Odisha)
Trial IDNCT06505668 on ClinicalTrials.gov

What this trial studies

This clinical trial investigates the effects of Atenolol and Ivabradine on heart rate variability in patients with treatment-resistant schizophrenia who are experiencing tachycardia while on clozapine. The study aims to determine which medication is more effective in managing tachycardia without causing significant adverse effects. Patients aged 18 to 60 with a baseline heart rate over 100 beats per minute will be enrolled, and those with contraindications to either medication will be excluded. The trial will provide insights into safer management strategies for heart rate issues in this vulnerable patient population.

Who should consider this trial

Good fit: Ideal candidates are patients aged 18 to 60 diagnosed with treatment-resistant schizophrenia who are currently receiving clozapine and have a heart rate exceeding 100 beats per minute.

Not a fit: Patients already on Atenolol or Ivabradine, or those with contraindications to these medications, will not benefit from this study.

Why it matters

Potential benefit: If successful, this study could offer a safer treatment option for managing tachycardia in patients with treatment-resistant schizophrenia on clozapine.

How similar studies have performed: While the use of beta-blockers for tachycardia is common, the specific comparison of Atenolol and Ivabradine in this context is relatively novel and has not been extensively tested.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

All patients coming for treatment at the Out-patient department and In-patient department of the Department of Psychiatry fulfilling the following are included:

1. Patients diagnosed with TRS (TRRIP consensus) receiving clozapine.
2. Aged between 18 to 60 years of either sex
3. Having baseline heart rate of \>100/minute.
4. Written informed consent from Legally Authorized representative.

Exclusion Criteria:

Patients with any one of the following are excluded from the study:

1. Already receiving Atenolol or Ivabradine.
2. Patients having any contraindication to using Atenolol or Ivabradine.
3. Receiving any other medication other than Clozapine known to cause autonomic dysregulation.
4. Active substance use.
5. Serious medical or neurological comorbidity.

Where this trial is running

Bhubaneswar, Odisha

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Treatment Resistant SchizophreniaClozapine Adverse ReactionHeart Rate VariabilityTachycardiaClozapineTreatment resistant schizophreniaheart rate variability
Last reviewed 2026-06-13 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.