application of nitroglycerine (a nitric oxide generator) combined with oral morphine, in
cancer pain patients. Design: Randomized, double-blind study. Setting: Teaching hospital.
Patients: 36 patients suffering from cancer pain. Interventions: Patients were divided into two
groups (n= 18). All patients were regularly taking oral amitriptyline 50 mg at bedtime. Pain
was evaluated using a 10-cm visual analog scale (VAS). The morphine regimen was …