Topic Explanation:
The forum topic is about managing constipation after receiving Keytruda treatment for colon cancer while having a colostomy bag. The person is seeking advice on what to eat or drink to alleviate mild constipation.

Advice and Insights:
- Increase fiber intake, stay hydrated, and decrease caffeine to manage constipation.
- Prune or grape juice can help with constipation.
- Prune juice is effective, but it's recommended to start with a small quantity as it can work too well in higher amounts.
- Milk of Magnesia can be beneficial for managing constipation, especially for those with an ileostomy bag.
- Using Miralax, as it draws water into the colon and is gentle, can help alleviate constipation.
- Side effects of Keytruda can vary, and it's important to communicate any concerns or symptoms to the healthcare provider for proper evaluation and management.