“…However, their adverse effects, including nausea, constipation, urinary retention, dizziness, and dysphoria, markedly limit their use (Bowdle, 1998; Cherny et al, 2001; Inturrisi, 1989; Pasternak, 1988). Non-steroidal anti-inflammatory drugs are used to manage painful metastases but also have severe side effects such as gastrointestinal disturbances (Schaffer et al, 2006; Scheiman, 2001) and cardiovascular risks (Davies and Jamali, 2004).…”