I am scheduled for Botox for the first time today. I took 500mg of Naproxen last night for back pain. Will it be ok?

 Botox, fillers, injectables, or any other procedure with needles have a potential for bruising. Usually there is little if any bruising  with Botox injections. Medications such as aspirin, ibuprofen, naproxen, and other nonsteroidal anti-inflammatory's can potentiate the risk of bruising. This is because they affect your ability to form a blood clot . They will not affect the results from the Botox treatment. If you are OK with slight increase chances of developing a bruise, then  you have little to worry about. 
 Best regards, Dr. WEISS.  

Hi and thank you for your question! Given the impact of Naproxen on your coagulation, the risk of bruising will be higher. However, Botox injection is quite superficial and it's done with very fine needles, so the impact should be minimal. It will be up to you if you are ok with a potential of more bruising for a few days. I hope it helps and good luck! 

You might be a little more susceptible to bruising but otherwise you should have no issues if you decide to proceed with Botox injections. Of course, it is also up to the preference of your treating surgeon.