Does Fylin Retard Interact with Nebilet and Exforge in Hypertension Treatment? - Cardiology

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Does Fylin Retard interact with Nebilet and Exforge?


My father has hypertension and usually takes Nebilet and Exforge for control.
However, recently he has had issues with proteinuria, and the nephrologist prescribed Fylin Retard, one tablet daily.
After less than half a month, his blood pressure measured 90/55 mmHg and his heart rate was 45-50 beats per minute.
I would like to know if Fylin Retard is causing peripheral blood circulation to increase, combined with the blood pressure medications causing vasodilation, leading to such low blood pressure?

Tong Er, 20~29 year old female. Ask Date: 2022/11/17

Dr. Li Han reply Cardiology


Hello, Fylin Retard (Pentoxifylline) is mentioned in the package insert, indicating that while it is not common, it may enhance the antihypertensive effects of antihypertensive medications and other drugs that lower blood pressure.
If your father's blood pressure has shown significant changes, it may be advisable to reduce the dosage of his antihypertensive medication before returning to discuss with his prescribing physician.
Continuous blood pressure monitoring is necessary during the medication adjustment period...
Changhua Hospital, Ministry of Health and Welfare, cares about you.

Reply Date: 2022/11/17

More Info


Fylin Retard, which contains Pentoxifylline, is primarily used to improve blood circulation and is often prescribed for conditions related to poor blood flow, such as peripheral vascular disease. It works by decreasing blood viscosity and improving red blood cell flexibility, which can enhance microcirculation. On the other hand, Nebilet (Nebivolol) and Exforge (a combination of Amlodipine and Valsartan) are antihypertensive medications used to manage high blood pressure. Nebivolol is a beta-blocker that primarily reduces heart rate and cardiac output, while Exforge combines a calcium channel blocker (Amlodipine) and an angiotensin receptor blocker (Valsartan) to lower blood pressure through vasodilation and reduced vascular resistance.

In your father's case, the combination of Fylin Retard with Nebilet and Exforge could indeed lead to a significant drop in blood pressure. While Fylin Retard is not commonly associated with severe hypotension, it can enhance the effects of other antihypertensive medications, particularly in patients who are already on a regimen for high blood pressure. The synergistic effect of these medications can lead to excessive vasodilation and reduced vascular resistance, resulting in hypotension, as indicated by the blood pressure reading of 90/55 mmHg and a heart rate of 45-50 beats per minute.

The low blood pressure and bradycardia (slow heart rate) observed in your father could be attributed to several factors. First, the addition of Fylin Retard may have increased peripheral blood flow, which, when combined with the vasodilatory effects of Nebilet and Exforge, could lead to a significant drop in systemic blood pressure. Furthermore, the renal issues indicated by the proteinuria may also affect how these medications are metabolized and excreted, potentially leading to increased concentrations of the antihypertensive drugs in the body.

Given these circumstances, it is crucial to monitor blood pressure closely and consider adjusting the dosages of the antihypertensive medications. It would be advisable to consult with your father's healthcare provider to discuss the current medication regimen and the possibility of reducing the doses of Nebilet and Exforge or even temporarily discontinuing one of them to see if blood pressure stabilizes. Continuous monitoring of blood pressure is essential during this adjustment period to prevent further episodes of hypotension.

In summary, the interaction between Fylin Retard and the antihypertensive medications Nebilet and Exforge can indeed lead to lower blood pressure due to their combined effects on vascular tone and blood flow. It is essential to approach this situation with caution and seek medical advice to ensure your father's safety and well-being.

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