Is it bad to drink 1 can of Red Bull and then 3 hours later to drink alcohol?

So today I had red bull and then 3 hours later me and my friends had drinks/alcohol which were rum and coke, another drink which was a mix of Fruits, lemonade and vodka. Anyways it's not good to mix it with alcohol but does this count as mixing since I waited 3 hours and is it bad?
Is it bad to drink 1 can of Red Bull and then 3 hours later to drink alcohol?
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