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Castor Oil

Medical and Pharmacy Editor:

Brand Name: Castor Oil and Emulsoil

Generic Name: castor oil

Drug Class: Laxatives, Other

What Is Castor Oil and How Does It Work?

Castor oil can be used as an irritant/simulative laxative. Castor oil is a natural emollient and a few drops may also be used to remedy dry skin, as a massage oil, and may benefit hair as a treatment. Castor oil contains ricinoleic acid, a fatty acid that comprises about 90% of the oil.

Castor oil is available under the following different brand names: Fleet Castor Oil and Emulsoil.

Dosages of Castor Oil Should Be Given As Follows:

  • Oral Solution, 100%

Dosage Considerations

Adult Dosage


  • 15-60 mL orally in one dose

Colonic Evacuation

  • 15-60 mL orally once, 16 hours before the procedure

Pediatric Dosage

  • under 2 years: 1-5 mL orally once
  • 2-12 years: 5-15 mL orally once
  • over 12 years: 15-60 mL orally once
Medically Reviewed by a Doctor on 4/14/2017

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