Final answer:
Mucositis is not a common side effect of Zytiga (abiraterone acetate); the medication typically causes side effects such as edema, hot flushes, and hepatotoxicity.
Step-by-step explanation:
The side effect among the options provided that is NOT a side effect of Zytiga (abiraterone acetate) is 4) Mucositis. Zytiga can cause several side effects such as edema, hot flushes, and hepatotoxicity. However, mucositis, which is an inflammation of the mucous membranes in the mouth, is not a commonly listed side effect of this medication. It's important to be aware of the potential severe side effects of Zytiga, such as impaired heart function and testicular atrophy; however, contrary to what might be suggested elsewhere, issues like prostate enlargement are not directly cured through surgeries but rather managed through various treatment strategies.