Adverse effects of calcium channels blockers used as tocolytic treatment

Journal de gynécologie, obstétrique et biologie de la reproduction
E ClouqueurV Debarge

Abstract

Tocolysis with calcium channel blockers is widespread in France. However, these molecules are off label use for this indication. The objective of this work is to give an update on all the side effects of calcium channel blockers published or reported to the National Bank of Pharmacovigilance. We conducted a literature review incorporating the animal experimental data on calcium channel blockers, retrospective and prospective studies (randomized or not) comparing different tocolytics, and the published clinical case reports. Finally we inquired the National Bank of Pharmacovigilance for reported cases of adverse effects after use of calcium channel blockers as tocolytics. Adverse effects are found in 2% to 6% of patients after use of nifedipine, of which 0.9% to 1.9% are severe. These are mainly headache, flushes and arterial hypotension. Data on Nicardipine are more limited. For the latter, adverse effects specifically related to the route of administration (induced phlebitis) are described but it seems that other adverse effects reported are not more frequent. Several meta-analyses have demonstrated a decrease in maternal side effects when using calcium channel blockers compared to β-agonists. Comparison of calcium channel blo...Continue Reading

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Jan 24, 2021·Birth Defects Research·Víctor Manuel Muñoz-PérezMario Hernándes-Alejandro

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