Lortab 10 is the strongest form of Lortab made. According to RxList the usual dosage for Lortab 10 is a tablet every 4-6 hours with no more than 6 tablets a day. Do not increase your dosage without your doctor's permission. Lortab can cause numerous side effects. Lortab 10 is a 'schedule three' drug which means it can cause physical dependence or addiction. Patients can also become tolerant to the drug; i.e. - recieve less benefits from it over time.
There are many different types of pain medications and different options you can pursue to get pain relief. You might consider getting a second opinion if you feel your doctor is not pursuing all the options possible. Good luck!
http://www.healthcentral.com/chronic-pain/find-drug-24941-25.html