Hi KLI122,
It sounds like you're looking for a way for the Health App to help you track medications and vitamins. We're glad you've joined us in Apple Support Communities, and we can provide some assistance.
There are a few pieces of data you can track in Health App > Other Data. Things like "Insulin Delivery" are listed there. It seems like you're looking for something different.
In that case, you might consider researching a third-party app that is compatible with the Health App. You'll want to go to the App Store and search. Then once you've researched and installed the app you want, follow the steps in "Find apps that are compatible with Health" in Manage Health data on your iPhone, iPod touch or Apple Watch.
We hope that helps with your question and take care!