Can secukinumab (Cosentyx) cause a slow pulse rate (bradycardia)?
Secukinumab is not commonly associated with slow pulse rate in the available information. There is no clear, widely documented signal that secukinumab directly causes bradycardia.
What symptoms might be mistaken for a “slow pulse” while on secukinumab?
Some effects that patients notice as “feeling like the pulse is slow” can come from other causes rather than bradycardia itself, such as:
- Lower blood pressure or dizziness after an infusion/injection reaction
- Dehydration or illness-related changes in heart rate
- Anxiety or changes in how people perceive their heartbeat
- Medication interactions with other drugs that lower heart rate (for example, beta blockers, some calcium-channel blockers)
When should someone contact a clinician urgently?
Seek urgent care or emergency help if slow pulse is accompanied by:
- Fainting or near-fainting
- Chest pain, trouble breathing, or severe weakness
- Confusion, persistent dizziness, or inability to stand
Could an allergic reaction to secukinumab affect heart rate?
Severe allergic reactions can affect heart rate and blood pressure, and symptoms can include dizziness or lightheadedness. If a person develops hives, swelling, wheezing, or significant dizziness shortly after a dose, they should get emergency help.
What to do if you notice your pulse is slow after a dose
A practical step is to track:
- When the slow pulse started relative to the injection
- Your pulse rate (and whether it stays low)
- Any other symptoms (dizziness, fainting, chest symptoms)
Share that information with the prescribing clinician promptly, especially if the pulse is consistently low or symptomatic.
If you tell me your age, typical pulse, how low it went, and whether you had symptoms (dizziness, fainting, chest pain), I can help you interpret how concerning it is and what to ask your clinician.