If you’re referring to headlines saying a popular blood pressure drug is linked to increased cardiac arrest risk, they are most likely referring to high-dose nifedipine, a calcium channel blocker.
A large observational study found that:
- High-dose nifedipine (60 mg/day or more) was associated with a higher risk of out-of-hospital cardiac arrest.
- Lower-dose nifedipine did not show this increased risk.
- Amlodipine, another commonly prescribed calcium channel blocker in the same class, was not associated with the increased risk. (PubMed)
It’s important to keep the findings in context:
- The study showed an association, not proof that high-dose nifedipine directly causes cardiac arrest.
- People taking higher doses may differ in important ways (for example, having more severe cardiovascular disease), although researchers tried to account for these factors.
- High blood pressure itself is a major risk factor for heart attack, stroke, heart failure, and sudden cardiac death. For most people, the benefits of controlling blood pressure outweigh the potential risks of medication. (PubMed)
If you take nifedipine:
- Do not stop it on your own. Suddenly stopping blood pressure medication can be dangerous.
- If you’re taking 60 mg/day or more, discuss the study with your healthcare provider. They can determine whether your current dose is appropriate or whether another medication, such as amlodipine or a different class of blood pressure drug, would be a better option based on your medical history. (PubMed)
If you tell me which blood pressure medication and dose you’re taking, I can explain what is known about that specific drug.
