<s>[INST] hi, i have recently been suffering with a really bad back, i went to the doctors last week and they perscribed me with co-codomals 30/500mg, the pain has been really bad tonigt so i took 2 and it diddnt go so i took another 2 so all in all ive had 4, will i end up overdoesing or end up with liver or kidney failure as im only 17 ? - See more at:  WWW.WWWW.WW [/INST] Hi Thanks for your query. Co common contains paracetamol and tramadol. Both of these do not affect the kidneys. Acetaminophen can affect the liver, but it is rare to have liver failure due to the use of 4 pills. So I think you should stop worrying.However, always take the medications under the supervision of a doctor and in the prescribed dose. If you do not have relief with the current dose please contact your doctor to see if he can suggest something different. Hope this helps Good luck. </s>