You're listing what you take at a medical appointment. Prescriptions, vitamins, maybe an occasional painkiller. Then you remember the CBD and wonder whether it counts.
Mention it. Your clinician needs to know about the products you actually use, not just the ones you think of as medicine.
THC is the main compound responsible for cannabis's high. CBD doesn't produce that same high. That difference matters, but it doesn't make every CBD product harmless or suitable for every person.
Bring the name, not just the initials
A bottle or packet may contain more than one ingredient. Take the packaging or a clear photo so the conversation doesn't stop at “it's CBD.” Include when you started using it and anything you've noticed since then.
Also be careful with headlines about research. A study of a particular cannabinoid or an approved medicine doesn't automatically tell you what a different retail product will do. The formulation and reason for using it matter.
You don't need to turn the appointment into a debate about cannabis. “I use this, and I want to check whether it matters with my other medicines” is a perfectly useful place to start.
If you don't understand part of the label, say so. A question is more helpful than leaving the product off the list.