Please, Please Be Careful with the Acetaminophen high dosage. A friend of mine's Dad passed from Tylenol Poisonings, Liver Failure. Hospitals also state Acetaminophen Poisonings is one of their most frequent, large amounts of patients. Perhaps you could ask your doctor about Tramadol 50mg pain medication? It is a synthetic, non addictive pain med that tricks the THC Center of the brain to believe and allow it to function as an Opioid; normally without any sleepiness, or "High" feelings. I have had CML Leukemia since 2004, oral Chemo 5 days per week, 3 failed Spinal/Lumbar Surgeries/Fractured C7 vertebrae and now PMR. Back pain resulted in onset of no clue sweating, puking, clammy pain attacks. The Tramadol once or twice a day for me is great, sometimes at worse moments combined with Acetaminophen once a day. My wife occasionally takes 25mg of Tramadol for her Sciatica or knee/meniscus topics with no complications. Just a thought. I hate to see any good person in pain.