Lercanidipine

Medical uses

Lercanidipine is used for the treatment of essential hypertension (high blood pressure).

Lercanidipine seems to be a good agent in treating hypertensive patients who also have kidney issues.

Contraindications

Like other dihydropyridines, lercanidipine is contraindicated in unstable angina pectoris, uncontrolled cardiac failure, shortly after a myocardial infarction, and in patients with left ventricular outflow tract obstruction. It is also contraindicated during pregnancy and in women who may become pregnant, because data regarding safety for the unborn are lacking, as well as in patients with severe liver and renal impairment.

The drug must not be combined with strong inhibitors of the liver enzyme CYP3A4 or with the immunosuppressant drug ciclosporin.

Adverse effects

Lercanidipine is generally well tolerated; no single adverse effect has been observed in more than 1% of patients treated with this drug. Typical side effects are similar to those of other drugs of this class and include headache, dizziness, tachycardia (fast heartbeat), palpitations, flush, and oedema. Hypersensitivity reactions occur in less than one patient in 10,000.

Oedemas are significantly less common under lercanidipine when compared to first-generation dihydropyridines such as nifedipine. For other side effects, data are inconclusive: A study comparing lercanidipine to first-generation drugs found no difference in the frequency of headache and flush, but switching from amlodipine, felodipine or nitrendipine (all at least second generation) to lercanidipine significantly decreased side effects in another study.

Overdose

Overdosing of up to 80 times the usual therapeutic dose has been described. Expected symptoms include severe hypotension (low blood pressure) and reflex tachycardia. Bradycardia (slow heartbeat) can also occur due to blockage of calcium channels in the atrioventricular node of the heart. There is no treatment besides monitoring blood pressure and heart function. Dialysis is likely ineffective because most of the lercanidipine is bound to blood plasma proteins and lipid membranes of cells.

Interactions

The substance is metabolised by the liver enzyme CYP3A4. In a study, the strong CYP3A4 inhibitor ketoconazole increased the maximal blood plasma concentrations of lercanidipine by a factor of eight, and the area under the curve by a factor of 15. In another study, ciclosporin increased lercanidipine plasma levels threefold when given at the same time. Other inhibitors of this enzyme, such as itraconazole, erythromycin, and grapefruit juice, are also expected to increase plasma concentrations and thus amplify the antihypertensive effect. Conversely, CYP3A4 inductors such as carbamazepine, rifampicin, and St John's wort probably lower plasma levels and effectiveness of lercanidipine. By comparison, amlodipine has a lower potential for CYP3A4 mediated interactions.

Lercanidipine increases plasma levels of ciclosporin and digoxin.

Pharmacology

Mechanism of action

Like other dihydropyridine class calcium channel blockers, lercanidipine blocks L-type calcium channels in the smooth muscle cells of blood vessels, relaxing them and thus lowering blood pressure. In contrast to the non-dihydropyridine calcium channel blockers verapamil and diltiazem, it does not significantly act on calcium channels in the atrioventricular node, and therefore does not decrease heart rate, in usual therapeutic doses.

Pharmacokinetics

Lercanidipine is slowly but completely absorbed from the gut. It has a total bioavailability of 10% due to an extensive first-pass effect, or up to 40% if taken after a fatty meal. Highest blood plasma levels are reached after 1.5 to 3 hours. The substance is quickly distributed into the tissues and bound to lipid membranes, where it forms a depot. The circulating fraction is almost completely (98%) bound to plasma proteins.

It is completely metabolized in the liver, mainly via CYP3A4. Elimination half-life is 8 to 10 hours, and the drug does not accumulate. Because of the depot effect, the antihypertensive action lasts for at least 24 hours. 50% is excreted via the urine.

Chemistry

Lercanidipine is used in form of the hydrochloride, which is a slightly yellow crystalline powder and melts at 197 to 201 C in crystal form I or 207 to 211 C in crystal form II. It is readily soluble in chloroform and methanol, but practically insoluble in water. This high lipophilicity (compared to older dihydropyridines) is intentional because it causes the substance to bind to lipid membranes, allowing for a longer duration of action.

The lercanidipine molecule has one asymmetric carbon atom. While the S-enantiomer is more effective than the R-enantiomer, marketed formulations contain a 1:1 mixture of both (i.e., the racemate).

Detection in body fluids

Blood plasma concentrations of lercanidipine can be detected by liquid chromatography–mass spectrometry methods.

References

References

1. (November 2006). "Lercanidipine is an effective and well tolerated antihypertensive drug regardless the cardiovascular risk profile: The LAURA study". International Journal of Clinical Practice.
2. (2006). "Analogue-based Drug Discovery". John Wiley & Sons.
3. "NCATS Inxight Drugs — LERCANIDIPINE HYDROCHLORIDE".
4. (2015). "Austria-Codex". Österreichischer Apothekerverlag.
5. (2015). "Arzneistoff-Profile". Govi Pharmazeutischer Verlag.
6. (2017). "Lercanidipine in the Management of Hypertension: An Update". Journal of Pharmacology & Pharmacotherapeutics.
7. (August 2009). "Results of a meta-analysis comparing the tolerability of lercanidipine and other dihydropyridine calcium channel blockers". Clinical Therapeutics.
8. (2002). "Interaction potential of lercanidipine, a new vasoselective dihydropyridine calcium antagonist". Arzneimittel-Forschung.
9. (November 2000). "Lack of effect of grapefruit juice on the pharmacokinetics and pharmacodynamics of amlodipine". British Journal of Clinical Pharmacology.
10. "Crude and crystalline forms of lercanidipine hydrochloride".
11. "Zanidip Data Sheet". [[Medsafe]].
12. (January 1999). "Lercanidipine, a new third generation Ca-antagonist in the treatment of hypertension.". Journal of Clinical and Basic Cardiology.
13. Rote Liste Service GmbH (Hrsg.): ''Rote Liste 2017 – Arzneimittelverzeichnis für Deutschland (einschließlich EU-Zulassungen und bestimmter Medizinprodukte)''. Rote Liste Service GmbH, Frankfurt/Main, 2017, Aufl. 57, {{ISBN. 978-3-946057-10-9, S. 171.
14. (June 2012). "Simultaneous determination of lercanidipine, benazepril and benazeprilat in plasma by LC-MS/MS and its application to a toxicokinetics study". Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences.