Plants used for digestive problems Aloes (Aloe vera) was boiled for five minutes and mixed with linseed oil. This was syringed down the horse's throat; some spit it out. Aloes was used for most internal problems and it was said to ease digestive problems. Subsequent to the administration of the Aloe vera the horse was given a purge with castor oil (Ricinus communis). Aloe leaves were also peeled and blended with water; this mixture was then combined with honey, and given orally with a syringe. A decoction of caraaili (Momordica charantia) vine was given orally as a digestive aid.