Can I find naproxen sodium pills in Guangzhou?
I easily found most popular over-the-counter meds in pharmacies in Guangzhou. You should not have any difficulties.
What are the differences between naproxen and naproxen sodium?
Naproxen is usually sold as a sodium salt, so "naproxen sodium" is redundant. So, "no difference" -- two names for the same thing.