Influence of ethanol on the delivery of intravenous nitroglycerin solutions

R. Leor, M. Feinstein, M. H. Luria, C. Hod, B. Rabinowitz

Research output: Contribution to journalArticlepeer-review


In order to evaluate the surface tension lowering effect of ethanol in intravenous nitroglycerin solutions of varying concentrations, drop size was measured in intravenous transfusion sets that should deliver 60 drops/ml. Ethanol 5% solutions led to a significant decrease in drop volume and a concomitant increase in the number of drops per unit volume, up to 79 drops/ml were observed. The surface tension lowering effect may account for decreases of up to 25% in delivered nitroglycerin when drop counting infusion pumps are used, and may be a factor in the development of apparent tolerance to intravenous nitroglycerin.

Original languageEnglish
Pages (from-to)307-310
Number of pages4
JournalEuropean Journal of Clinical Pharmacology
Issue number3
StatePublished - May 1989
Externally publishedYes


  • drop volume
  • drug delivery
  • ethanol
  • nitroglycerin
  • surface tension


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