Apologies in advance if the math in this post causes anyone's head to explode..
conversion information for Oxycontin is on page 22 of the package insert. Obviously your doctor has to make the final decision on dosing based on your clinical presentation and other health issues, but that information is made available to give a general idea of where one might start when converting.www.purduepharma.com/PI/Prescription/Oxycontin.pdf
package insert said...
When converting from oxycodone, divide the 24-hour oxycodone dose in half to obtain the twice a day (q12h) dose of OxyContin.
So, if you want to calculate from immediate release oxycodone to Oxycontin, you have to start by adding up the total amount of oxycodone you take in a day. Then you take that total amount and divide it by 2, which will give you the Oxycontin dosage you'd take every 12 hours. For example, if you're taking oxycodone 10mg immediate release tablets 4 times a day, that means you're taking 40mg of oxycodone over 24 hours. You divide that by 2 and that gives you a dose of 20mg of Oxycontin every 12 hours.
If you were to do that math backwards, Oxycontin 10mg tablets would give you 20mgs of oxycodone in 24 hours, which would be the equivalent of taking 5mg of oxycodone immediate release 4 times per day. So, if the oxycodone content of your Supeudole dose is greater than 5mg every 6 hours/20mg per 24 hours, it would explain why the 10mg Oxycontin dose doesn't work well for you.