Is it safe to take robaxin 500mg 2x a day, trazodone 50mg, Zoloft (sertraline) 50 mg, ibuprofen 800 4x a day, and vicodin 5/500mg every 8-10 hrs together?

Ask your doctor . Each of the listed medications may cause side effects and there is a possibility for drug-drug interaction. Discuss this regime with your prescribing doctor as there may be extenuating circumstances that justify this regimen. Vicodin may lead to tolerance, dependance and addiction. Ibuprofen 4 x a day may lead to serious side effects.
Not really. You need to resolve the cause of the pain and not cover the pain with medication. Prolotherapy will help fix you up. Visit www.Getprolo.Com or www.Aaomed.Org for a doctor that can help you and for information about the prolotherapy.