Absorption, Distribution and Excretion
Oral levamlodipine has a Tmax of 6-12h and a bioavailability of 64-90%. Absorption of levamlodipine is not significantly affected by food. 20mg or oral s-amlodipine besylate reaches a Cmax of 6.13±1.29ng/mL with a Tmax of 8.4±3.6h and an AUC of 351±72h\*ng/mL. 20mg or oral s-amlodipine maleate reaches a Cmax of 5.07±1.09ng/mL with a Tmax of 10.7±3.4h and an AUC of 330±88h\*ng/mL.
Levamlodipine is 60% eliminated in urine with 10% eliminated as the unmetabolized drug.
The volume of distribution of levamlodipine is similar to amlodipine. The volume of distribution of amlodipine is 21L/kg.
The oral clearance of S-amlodipine besylate is 6.9±1.6mL/min/kg and the oral clearance of S-amlodipine maleate is 7.3±2.1mL/min/kg.

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Metabolism / Metabolites
Levamlodipine is 90% metabolized to inactive metabolites. Incubation with liver microsomes has shown that this metabolism is primarily mediated by CYP3A4. Levamlodipine's dehydrogenation to a pyridine metabolite (M9) is the most important metabolic pathway in human liver microsomes. This derivative can be further oxidatively deaminated or O-dealkylated, but does not appear to undergo O-demethylation like racemic amlodipine.

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Biological Half-Life
Levamlodipine has a half life of 30-50h.

Protein Binding
Levamlodipine is 93% protein bound in plasma, largely to human serum albumin.

[1]. Polyaniline-graphene oxide nanocomposite sensor for quantification of calcium channel blocker levamlodipine. Mater Sci Eng C Mater Biol Appl. 2016 Aug 1;65:205-14.

(S)-amlodipine is the (4S)-enantiomer of amlodipine. It is an enantiomer of a (R)-amlodipine.
Levamlodipine, also known as S-amlodipine, is a pharmacologically active enantiomer of [amlodipine], an antihypertensive medication. Levamlodipine belongs to the dihydropyridine group of calcium channel blockers. This medication was first marketed in Russia and India before being granted FDA approval. The names S-amlodipine and levamlodipine may be used interchangeably as both substances are the same, however. As a racemic mixture, amlodipine contains (R) and (S)-amlodipine isomers, but only (S)-amlodipine as the active moiety possesses therapeutic activity. Levamlodipine was granted FDA approval on 19 December 2019.
See also: Levamlodipine Maleate (active moiety of); Levamlodipine Malate (is active moiety of); Levamlodipine besylate (is active moiety of) ... View More ...

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Drug Indication
Levamlodipine is indicated alone or in combination to treat hypertension in adults and children.
FDA Label

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Mechanism of Action
Levamlodipine blocks the transmembrane influx of calcium through L-type calcium channels into the vascular and cardiac smooth muscles resulting in vasodilation and a subsequent decrease in blood pressure. Levamlodipine inhibits calcium influx in vascular smooth muscle to a greater degree than in cardiac muscle, leading to decreased peripheral vascular resistance and lowered blood pressure. In vitro studies have shown a negative inotropic effect but this is unlikely to be clinically relevant.

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Pharmacodynamics
Levamlodipine inhibits L-type calcium channels in vascular smooth muscle, reducing peripheral vascular resistance and blood pressure. It is given once daily in doses of 1.25-2.5mg in children and 2.5-5mg in adults. Patients should be counselled regarding the risk of symptomatic hypotension, worsening angina, and myocardial infarction.

C20H25CLN2O5

408.87

566.148

103129-82-4

Levamlodipine besylate;150566-71-5;Levamlodipine-d4;1346617-19-3

9822750

White to off-white solid powder

1.2±0.1 g/cm3

527.2±50.0 °C at 760 mmHg

102-104°C

272.6±30.1 °C

0.0±1.4 mmHg at 25°C

1.546

4.16

99.88

2

7

10

28

647

1

CCOC(=O)C1=C(NC(=C([C@@H]1C2=CC=CC=C2Cl)C(=O)OC)C)COCCN

HTIQEAQVCYTUBX-KRWDZBQOSA-N

InChI=1S/C20H25ClN2O5/c1-4-28-20(25)18-15(11-27-10-9-22)23-12(2)16(19(24)26-3)17(18)13-7-5-6-8-14(13)21/h5-8,17,23H,4,9-11,22H2,1-3H3/t17-/m0/s1

3-O-ethyl 5-O-methyl (4S)-2-(2-aminoethoxymethyl)-4-(2-chlorophenyl)-6-methyl-1,4-dihydropyridine-3,5-dicarboxylate

Levamlodipine S-Amlodipine

2934.99.9001

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

DMSO : ~100 mg/mL (~244.57 mM)

配方 1 中的溶解度: ≥ 2.5 mg/mL (6.11 mM) (饱和度未知) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (这些助溶剂从左到右依次添加，逐一添加), 澄清溶液。
例如，若需制备1 mL的工作液，可将100 μL 25.0 mg/mL澄清DMSO储备液加入到400 μL PEG300中，混匀；然后向上述溶液中加入50 μL Tween-80，混匀；加入450 μL生理盐水定容至1 mL。
*生理盐水的制备：将 0.9 g 氯化钠溶解在 100 mL ddH₂O中，得到澄清溶液。

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配方 2 中的溶解度: ≥ 2.5 mg/mL (6.11 mM) (饱和度未知) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (这些助溶剂从左到右依次添加，逐一添加), 澄清溶液。
例如，若需制备1 mL的工作液，可将 100 μL 25.0 mg/mL澄清DMSO储备液加入900 μL 20% SBE-β-CD生理盐水溶液中，混匀。
*20% SBE-β-CD 生理盐水溶液的制备（4°C，1 周）：将 2 g SBE-β-CD 溶解于 10 mL 生理盐水中，得到澄清溶液。

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请根据您的实验动物和给药方式选择适当的溶解配方/方案：
1、请先配制澄清的储备液(如：用DMSO配置50 或 100 mg/mL母液(储备液));
2、取适量母液，按从左到右的顺序依次添加助溶剂，澄清后再加入下一助溶剂。以 下列配方为例说明 (注意此配方只用于说明，并不一定代表此产品 的实际溶解配方):
10% DMSO → 40% PEG300 → 5% Tween-80 → 45% ddH2O (或 saline);
假设最终工作液的体积为 1 mL, 浓度为5 mg/mL: 取 100 μL 50 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中，混合均匀/澄清；向上述体系中加入50 μL Tween-80，混合均匀/澄清；然后继续加入450 μL ddH2O (或 saline)定容至 1 mL；
3、溶剂前显示的百分比是指该溶剂在最终溶液/工作液中的体积所占比例;
4、 如产品在配制过程中出现沉淀/析出，可通过加热(≤50℃)或超声的方式助溶;
5、为保证最佳实验结果，工作液请现配现用！
6、如不确定怎么将母液配置成体内动物实验的工作液，请查看说明书或联系我们;
7、 以上所有助溶剂都可在 Invivochem.cn网站购买。