There is no recommended daily dosage of prickly pear as a treatment for diabetes, states Drugs.com. Practitioners of traditional Mexican folk medicine use prickly pear to treat diabetes, but there is little clinical data indicating its value.
Prickly pear is widely available as capsules, tablets, powders, juices and food, including jellies and candies, reports Drugs.com. Manufacturers usually include dosage recommendations with the product. For example, the dosage recommendation for capsules is usually two 250-milligram capsules every eight hours, or three times a day.
In the absence of clinical data regarding the substance, pregnant or lactating women should not ingest prickly pear, cautions Drugs.com. Some people may be sensitive to prickly pear, with dermatitis as the most commonly reported side effect.