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Nimodipine Dose Reductions in the Treatment of Patients with Aneurysmal Subarachnoid Hemorrhage

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Abstract

Background

The incidence of cerebral infarction and poor outcome in patients with aneurysmal subarachnoid hemorrhage (aSAH) is reduced by oral nimodipine but acute effects of the drug may include a significant decrease in mean arterial blood pressure (MAP). A dose reduction or discontinuation of the drug is recommended if recurrent MAP drops occur. The aim of our study was to evaluate the frequency and clinical significance of nimodipine dose modifications in patients suffering from aSAH.

Methods

270 patients were included in our retrospective analysis of consecutively collected data of patients suffering from aSAH. The local treatment protocol was in accordance to national and international guidelines. Nimodipine was intended to be applied orally with a dosage of 60 mg every 4 h.

Results

Only 43.6 % of patients eligible for vasospasm prophylaxis with nimodipine received the full daily dose of 60 mg every 4 h. In 28.6 %, the dose had to be reduced by 50 % due to a significant reduction in blood pressure after administration and/or high dose of catecholamines. In 27.7 % of patients, oral administration of the drug was discontinued for the same reason. Dose reduction and discontinuation occurred with a significantly higher frequency in patients in poor clinical condition. Application of the full nimodipine dosage decreased the risk of unfavorable clinical outcome in multivariate analysis (OR 0.895, p = 0.029).

Conclusions

Our results show that dose reduction or discontinuation of nimodipine due to changes in MAP occur frequently in clinical routine and may be associated with unfavorable clinical outcome.

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Acknowledgments

The authors are grateful to Norbert Baro for assistance and data management.

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Authors and Affiliations

  1. Department of Neurosurgery, Charité Universitätsmedizin Berlin, Augustenburger Platz 1, 13353, Berlin, Germany

    Nora Sandow, Dominik Diesing, Peter Vajkoczy & Stefan Wolf

  2. Department of Neurosurgery, Heidelberg University Hospital, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany

    Asita Sarrafzadeh

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  1. Nora Sandow
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  2. Dominik Diesing
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  4. Peter Vajkoczy
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Correspondence to Nora Sandow.

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Sandow, N., Diesing, D., Sarrafzadeh, A. et al. Nimodipine Dose Reductions in the Treatment of Patients with Aneurysmal Subarachnoid Hemorrhage. Neurocrit Care 25, 29–39 (2016). https://doi.org/10.1007/s12028-015-0230-x

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