Last update May 22, 2024

Oxprenolol Hydrochloride

Very Low Risk

Safe. Compatible. Minimal risk for breastfeeding and infant.

Non-cardioselective beta-blocker indicated in the treatment of hypertension, angina pectoris and cardiac arrhythmias. Oral administration in two or three daily doses.

It is excreted in breast milk in clinically insignificant amounts.(Sioufi 1984, Fidler 1983)

Expert authors consider the use of this medication to be probably compatible during breastfeeding.  (Dennis 2012, Ghanem 2008)

American Academy of Pediatrics: medication usually compatible with breastfeeding.(AAP 2001)

It is a drug that is no longer marketed in many countries.


  • Labetalol Hydrochloride ( Safe. Compatible. Minimal risk for breastfeeding and infant.)
  • Propranolol ( Safe. Compatible. Minimal risk for breastfeeding and infant.)
  • Timolol Maleate ( Safe. Compatible. Minimal risk for breastfeeding and infant.)

Suggestions made at e-lactancia are done by APILAM team of health professionals, and are based on updated scientific publications. It is not intended to replace the relationship you have with your doctor but to compound it. The pharmaceutical industry contraindicates breastfeeding, mistakenly and without scientific reasons, in most of the drug data sheets.

Jose Maria Paricio, Founder & President of APILAM/e-Lactancia

Your contribution is essential for this service to continue to exist. We need the generosity of people like you who believe in the benefits of breastfeeding.

Thank you for helping to protect and promote breastfeeding.

José María Paricio, founder of e-lactancia.

Other names

Oxprenolol Hydrochloride is also known as

Oxprenolol Hydrochloride in other languages or writings:


Oxprenolol Hydrochloride belongs to these groups or families:


Main tradenames from several countries containing Oxprenolol Hydrochloride in its composition:


Variable Value Unit
Oral Bioavail. 40 (20 - 70) %
Molecular weight 265 daltons
Protein Binding 80 - 90 %
VD 1.3 l/Kg
pKa 14.09 -
Tmax 1.5 (0.5 - 2) hours
1 - 3 hours
M/P ratio 0.2 - 0.4 -
Theoretical Dose 0.02 - 0.07 mg/Kg/d
Relative Dose 0.8 - 1.8 %


  1. Dennis AT. Management of pre-eclampsia: issues for anaesthetists. Anaesthesia. 2012 Sep;67(9):1009-20. Abstract Full text (link to original source) Full text (in our servers)
  2. Tamargo Menéndez J, Delpón Mosquera E. Farmacología de los bloqueantes de los receptores β-adrenérgicos. Curso βeta 2011 de Actualización en Betabloqueantes. 2011 Full text (in our servers)
  3. Ghanem FA, Movahed A. Use of antihypertensive drugs during pregnancy and lactation. Cardiovasc Ther. 2008 Abstract Full text (link to original source) Full text (in our servers)
  4. AAP - American Academy of Pediatrics Committee on Drugs. Transfer of drugs and other chemicals into human milk. Pediatrics. 2001 Sep;108(3):776-89. Abstract Full text (link to original source) Full text (in our servers)
  5. Riant P, Urien S, Albengres E, Duche JC, Tillement JP. High plasma protein binding as a parameter in the selection of betablockers for lactating women. Biochem Pharmacol. 1986 Abstract
  6. Sioufi A, Hillion D, Lumbroso P, Wainer R, Olivier-Martin M, Schoeller JP, Colussi D, Leroux F, Mangoni P. Oxprenolol placental transfer, plasma concentrations in newborns and passage into breast milk. Br J Clin Pharmacol. 1984 Sep;18(3):453-6. Abstract
  7. Fidler J, Smith V, De Swiet M. Excretion of oxprenolol and timolol in breast milk. Br J Obstet Gynaecol. 1983 Oct;90(10):961-5. Abstract

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