Dragon fruit when consumed in excess can cause the following side effects.
Excessive consumption of dragon fruit can lead to intestinal gas, stomach ache, and flatulence.
Antioxidants such as beta carotene in excess are harmful and can cause lung cancer.
Antioxidants such as Vitamin C in excess are harmful and can cause hemorrhagic stroke.
If you are sensitive to dragon fruit, it might cause allergic reactions such as swollen lips and tongue, itchy throat, burning feeling in the throat, and so on.
Eating too much of dragon fruit can produce an increase in potassium in the system, which can lead to hypotension.