Benidipine Hydrochloride

An environmentally friendly HPLC method was developed to estimate angiotensin receptor blocker (telmisartan) and calcium channel blockers (cilnidipine, benidipine and azelnidipine) in a single run. Separation was achieved using a C18 column (250 mm × 4.6 mm, 5 μm), employing an eluent consisting of 10 mM potassium phosphate buffer (pH 5), methanol and acetonitrile in a ratio of (25:45:30, v/v/v) at 1.0 mL/min flow. Validation of the method was confirmed, following ICH guidelines. Calibration graphs were found to be linear in the ranges of 2.5–40, 0.625–10, 0.5–8 and 1–16 μg/mL corresponding to telmisartan, cilnidipine, benidipine and azelnidipine, respectively. To assess the environmental impact of the method, five greenness evaluation criteria, namely, the Green Analytical Procedure Index, Analytical GREEness, Chlortox Scale, Blue Applicability Grade Index, and Red-Blue-Green 12, were adopted. Concerning all the tools, the proposed method was found to be green.

Cloudiness in peritoneal dialysate is a key clinical indicator of peritonitis. However, distinguishing between turbidity caused by peritonitis and that induced by drug administration can be challenging. To better understand this phenomenon, data were collected between April 2020 and March 2023 from 287 peritoneal dialysis (PD) patients undergoing benidipine-controlled blood pressure management in our PD center. Among these patients, 25 cases (8.71%) developed non-infectious chyloperitoneum as an adverse reaction to benidipine. Turbidity appeared, on average, 25.28 ± 60.55 days after starting benidipine. Switching to another antihypertensive drug cleared the dialysate within 12 to 36 hours. Laboratory results, including smears and cultures, were consistent with a non-infectious state. Elevated triglyceride (TG) levels were observed in the turbid dialysate ( p  < 0.0001), with a mean TG of 0.28 ± 0.17 mmol/L in cloudy samples, compared to 0.07 ± 0.03 mmol/L in clear samples. No significant changes in cholesterol or peripheral blood TG levels were found before or after the occurrence of turbidity. This study confirms that benidipine can cause non-infectious chyloperitoneum, underscoring the need for attention to adverse drug reactions to avoid unnecessary resource use. Further investigation is required to guide antihypertensive medication choices in PD patients.