stomach pain and pain med question

 

Helloeveryone

I need some information and I hope someone here can help me

I have been having some very severe low leftsided stomach pain and after my GP did all the tests they came back basically normal yet this pain continues now for my question My GP said and looked it up on his computer that the Oxycontin I take for my back has stomach pain as a side effect which I never herd of before and I have been taking it since 1994 with no problem s at all

Please can someone tell me if they have herd of this or has experienced severe stomach pain as a side effect

Thanks for any help