Paltusotine and Atenolol: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 15, 2026 · Source data updated Jul 11, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Atenolol
Paltusotine
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
You've been prescribed atenolol (a beta-blocker that slows the heart) and paltusotine (used for acromegaly). Both can slow the electrical signals that travel through your heart. When they're taken together, that slowing effect can add up, and your heart rate may drop lower than intended or your heart's rhythm may change.
This concern is mostly theoretical, meaning it's based on how these drugs work rather than lots of proven cases, so try not to worry. Your care team can manage it easily by checking your pulse or doing an ECG and adjusting your dose if needed. Let them know if you feel dizzy, faint, unusually tired, or notice a very slow heartbeat.
Effect: Additive risk of PR interval prolongation and other conduction abnormalities.
Mechanism: Both agents slow AV nodal conduction. Atenolol via beta-1 blockade reduces heart rate and AV conduction; paltusotine has been associated with bradycardia, sinus arrest, and AV block in trials. Effects are additive (pharmacodynamic).
- Direction: Increased bradycardia/conduction slowing
- Onset: Unspecified
- Evidence: Theoretical
- Severity: Moderate
Management: Monitor HR and ECG (PR interval); watch for symptomatic bradycardia or AV block, especially in acromegaly. Dose of bradycardia-inducing agents may need individualized adjustment by the care team.
What happens
An increased risk of PR interval prolongation
Interaction Deep Dive
When paltusotine is taken together with beta-blockers, it can lead to disturbances in cardiac conduction along with other ECG alterations, including prolongation of the PR interval. In clinical trials, participants receiving paltusotine experienced bradycardia, sinus arrest, and atrioventricular block. Such ECG alterations can arise in patients who have acromegaly. It may be necessary to modify the dosage of co-administered medications that produce bradycardia effects1.
Why it happens (mechanism)
Additive PR interval prolongation
How to manage this interaction
Keep taking both medications exactly as prescribed unless your doctor or pharmacist tells you otherwise. Because both can slow your heart, your care team may:
- Check your heart rate and possibly do an ECG to watch your heart's rhythm (PR interval)
- Adjust the dose of a medication that slows the heart, individualized to you, if needed
- Monitor you more closely, especially given acromegaly
Tell your pharmacist or prescriber if you feel dizzy, faint, very tired, short of breath, or notice a slow or irregular heartbeat. Don't stop either drug on your own.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Paltusotine and Atenolol together?
Atenolol and paltusotine can both slow your heart, so together they may cause a slower heart rate or rhythm changes; this is a theoretical concern your care team can manage with pulse checks, ECG monitoring, and dose adjustment if needed. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Paltusotine and Atenolol interaction?
It is rated moderate. Can be significant — usually manageable with monitoring.
How quickly could this interaction happen?
The documented onset is "unspecified". The timing of this interaction is not well characterized.
How is the Paltusotine and Atenolol interaction managed?
Keep taking both medications exactly as prescribed unless your doctor or pharmacist tells you otherwise. Because both can slow your heart, your care team may: Check your heart rate and possibly do an ECG to watch your heart's rhythm (PR interval) Adjust the dose of a medication that slows the heart, individualized to you, if needed Monitor you more closely, especially given acromegaly Tell your ph… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
Questions for your pharmacist
- Does my dose of Paltusotine or Atenolol need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there anything you'd monitor while I'm on both?
References (1)
- Product Information: PALSONIFY™ oral tablets, paltusotine oral tablets. Crinetics Pharmaceuticals, Inc (per FDA), San Diego, CA, 2025. DailyMed
Keep reading about Atenolol
Keep reading about Paltusotine
These medications also interact with supplements
Prescription drugs aren't the whole picture — herbal and dietary supplements can interact with them too. From the evidence-graded Natural Medicines database:
major · moderate · minor — check everything you take with our drug–supplement interaction checker.
Check another combination
Our instant two-drug interaction checker is almost here.
Still have questions about this combination?
Every question gets a real answer from a licensed pharmacist — free, and usually within a day.
Ask the pharmacist