For people with severe addictions to oxycodone, long-term rehabilitative care might be necessary to make sure that they can gain and hold onto lasting sobriety. Long-term drug treatment programs will last anywhere between 3 months and 6 months. Some people may decide that they need even longer to achieve a confident level of sobriety that will stand up to the pressures of temptations later. No matter how long you feel the need for long-term rehab, we will be here to keep you comfortable.