Ethoxylated hydrogenated castor oil is a combination of synthetic polyethylene glycol (PEG) with natural castor oil. Ethoxylated hydrogenated castor oil can be used to emulsify and solubilize oil-in-water (o/w) emulsions.

Castor oil (Xenaderm) is a vegetable oil pressed from the seeds of the castor bean, Ricinus communis, used as a laxative and as an excipient in medicinally.

Ricinoleic acid is a natural product that constitutes about 90% of the fatty acids in castor oil.

ADL 08-0011 is an active metabolite of the μ-opioid receptor antagonist alvimopan. It is produced from alvimopan via amide hydrolysis by gut microbiota. ADL 08-0011 is a μ-opioid receptor antagonist (Ki = 0.25 nM). It is selective for μ-opioid receptors over κ- and δ-opioid receptors (Kis = 15.8 and 31.6 nM, respectively). ADL 08-0011 inhibits endomorphin 1-induced inhibition of electrically induced contraction of isolated guinea pig ileum (pA2 = 9.4). In vivo, ADL 08-0011 (0.03-1 mg/kg) reverses loperamide-induced delayed gastric emptying in a rat model of castor oil-induced diarrhea.

Ricinoleic acid is a naturally occurring 12-hydroxy fatty acid. It constitutes about 90% of the fatty acids in castor oil. Pyrrolidine Ricinoleamide is a derivative of the amide of ricinoleic acid that shows potent antiproliferative activity against an array of cancer cell lines, including human glioma U251 cells.

Racecadotril (Acetorphan) has been investigated for the basic science and treatment of Diarrhea, Acute Diarrhea, and Acute Gastroenteritis.