Does caffeine change how and anxiety medication works?

by SubspaceLast week I started taking Buspar for anxiety and my doctor keeps slowly increasing my dosages but it still makes me really tired during the day.To deal with being tired I started drinking coffee which still only helps a little.Does caffeine change how well my medication will work?
Sorry about the grammatical error in the title, like I said, I'm tired so everything gets botched.

Answer by Caring Breeze
Yes, you may be tired now, but having caffeine can negate(take away) what the pills are doing for you.Your body will get used to the medication and you will become less tired, but if you have caffeine your anxiety meds will not help as much as they can.

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