You'd have to ask your care team. Every med can interact with other meds, and the only people that can tell you if you're ok taking other things are the people treating you.
My wife was able to take most meds, but that came from her oncologist or the nurses she was under each time.
It is always a good idea to check with the nurses and doctors involved in your care if you plan to take any over the counter medicines such as cough mixture. You could also check with the pharmacist at your local chemist it you are aware of the chemotherapy that you are taking. They are usually a good source of information.
