Conditions: Chronic Fatigue Syndrome
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 12
Healthy volunteers: yes

Brief summary:
Use of Viagra to Alter Symptoms in Patients with Chronic Fatigue Syndrome (CFS)

Detailed description:
Use of Sildenafil (Viagra) to Alter Fatigue, Functional Status and Impaired Cerebral Blood Flow in Patients with Chronic Fatigue Syndrome.

Arms:
arm 1: sidenafil arm 2: placebo

Interventions: intervention 1: Sildenafil (Viagra) intervention 2: Placebo
Intervention descriptions: intervention 1: 25 mg tid of either Sildenafil(Viagra) for first week. 50 mg tid of either Sildenafil (Viagra) for second week. 100 mg tid of either Sildenafil (Viagra) 3rd,4th, 5th and 6th week of study participation. intervention 2: Placebo pills 3X/day for 6 weeks

Protocol document: