Oxycodone makes me sick, what else can be prescribed for this?

Many things: Nausea is not an uncommon side effect of opioids in general. If oxycodone in particular is making you sick, your physician may try prescribing a different opioid that you will may tolerate better.

Might consider patch: Although several choices of opioids are available, the Butrans patch applied and replaced once weekly, could provide consistent levels of analgesia, plus decrease in many adverse side affects due to lack of plasma peaks. Have you doctor discuss benefits and risks of the opioid class.

Sick in what way?: There are side effects common to all opioids (like nausea, vomiting, itching, flushing, headache, dizziness and constipation) where you may have them with any opioid prescribed. Pain can be treated in many ways - reducing the cause of pain, anti-inflammatory drugs, anti-convulsants and others, depending on what the pain is from. Your doctor and/or pharmacist should be who you are asking.

Tramadol: Tramadol is a rather unique analgesic drug that is indicated for moderate to moderately severe pain. Although it binds to mu receptors, tramadol is not technically classified as an opioid analgesic. Instead, it is classified as a centrally acting synthetic analgesic compound and therefore is not a scheduled narcotic drug.