Can pregabalin cause a low heart rate (bradycardia)?
Yes. Pregabalin can affect the nervous system and, in some people, has been associated with slow heart rate (bradycardia). If you notice symptoms such as dizziness, fainting, unusual fatigue, chest discomfort, or shortness of breath, treat that as urgent and get medical care promptly.
What would make pregabalin more likely to lower heart rate?
Low heart rate is more likely when pregabalin interacts with other factors that also slow the heart, such as:
- Beta-blockers or other rate-slowing medicines (for blood pressure or heart rhythm)
- Certain antiarrhythmics
- Dehydration, electrolyte problems (like low potassium or magnesium)
- Existing heart rhythm conditions
- Other sedating drugs that affect breathing and autonomic function (which can indirectly worsen cardiovascular stability)
What should I do if my heart rate is low after starting pregabalin?
Check both the number and how you feel.
- If you have warning symptoms (fainting, chest pain, severe dizziness, breathing trouble), seek emergency care.
- If you feel okay, contact the prescriber for advice on whether the dose should be adjusted or stopped and whether you need an ECG or vital-sign monitoring.
Do not stop pregabalin suddenly without medical guidance, especially if you’re taking it for nerve pain, anxiety, or seizures.
What low heart rate numbers are concerning?
Many clinicians treat “low” heart rate differently depending on age, baseline, and symptoms. A slow pulse accompanied by symptoms is the bigger red flag than the exact number. If you’re seeing heart rates in the 40s or lower, or you have any concerning symptoms, get same-day medical review.
Are there specific pregabalin side effects that overlap with bradycardia?
Symptoms people notice with slow heart rate can also overlap with other pregabalin effects, including:
- Dizziness or lightheadedness
- Sleepiness or confusion
- Feeling weak or unusually tired
Because these can also occur from dehydration, low blood pressure, or medication interactions, clinicians often check blood pressure, hydration status, and an ECG when bradycardia is suspected.
When to seek emergency care
Go to the ER or call local emergency services if low heart rate comes with:
- Fainting or near-fainting
- Chest pain/pressure
- Severe dizziness that doesn’t quickly improve
- Shortness of breath
- A very slow pulse that persists despite rest
What information should I share with the doctor?
Helpful details include:
- Your pregabalin dose, when you started or changed it, and whether it’s immediate-release or extended-release
- Your pulse readings (with dates/times) and blood pressure if you have it
- All other medications and supplements (especially heart/blood pressure drugs)
- Any symptoms (dizziness, fainting, chest pain, breathlessness)
- Any history of heart rhythm problems
Sources
I don’t have enough provided information in your message to cite specific references (and I’m not seeing any drug-reference links included). If you share the dose and your other medications, I can tailor the most relevant risk and monitoring guidance.