Knowing your medications is important. Doctors and Nurses are not psychic. Consider that you may get your medications from more than one doctor and may supplement with herbs and many over the counter medications as well.
Medications interact with each other, even the store bought ones. And herbs are recommended for medicinal or feel-good properties. They interact with your medications also.
Ask yourself these things about your medications, herbs and over the counter products.
What is this for?
Why am I taking it?
What is the dose and the frequency?
What are the intended effects?
What happens if I don't take it on time?
What are the main unwanted but expected possible side effects?
Is there a comparable generic?
Is this medication or herb or other medicine doing its job?
Do I need to get labs periodically to make sure it isn't hurting me?
Does my main doctor know everything I am taking?
If I go to the hospital can I accurately list them all for the nurse?
How old are they?
Are they affected by humidity or heat?
Where am I keeping them?