I have sciatica and it’s been so bad where it hurts all of the time not just when walking. I rang my dr and they gave me codeine and it’s not helping fully I’d say taking the edge off. I have an ibuprofen gel lying around from when my partner hurt his back a while back. Would it be safe to rub some into my back? I know we can’t take ibuprofen pills but the gel should be ok shouldn’t it? I forgot to add in 16 weeks