“Both classical analgesics (nonsteroidal anti-…, phenytoin or carbamazepine and α-lipoic acid can modulate the balance … of drugs such as indomethacin , meloxicam, tenoxicam, valdecoxib or some metabolites of analgesic drugs formed by the activity of …, including gastrointestinal ulcers, hepatic failure, agranulocytosis, aplastic anemia, neutropenia, opiate-induced hyperalgesia and tolerance.”