My son has tried Ibuprofen 600 mg with minimal relief, I had some Voltaren ointment and put some on his knee and he said it really helped shortly after putting it on. Is it ok to use in a teen (athlete) to use occasionally instead of the Ibuprofen? He has also tried a brace for his knee, ice, heat , all without relief, the MD said about the only thing that will help is stay off of it completely and that isn't an option, also said he will out grow this by age 16. If it helps to use Voltaren while he is playing basketball and if it isn't harmful is it appropiate to use?