I don't suffer from opioid based fatigue (they, rather, tend to have the opposite effect on me). But my PM recommends: 2000+i.u. of Vitamin D, 200mg Coenzyme Q10, 5g D-Ribose. I take all these at dinner.
Also, consider Provigil, a prescription medication that patients with opioid based fatigue are sometimes prescribed.
One other thing to consider is the timing of your medication. Maybe take it at night if you're not already?
C4-T4 Scoliosis (disk degeneration, stenosis, narrowed neuroforamen, bone spurs), RT hip and SI joint damage from car accident. Also, pectus excavatum, supraventricular tacycardia and mitral valve prolapse syndrome.
Current meds: Ultram ER 300mg daily, breakthrough - hydrocodone 10-15mg, or oxycodone 5-7.5mg. .25-.5mg ativan as needed for sleep, Verapamil 240mg SR (for tachycardia). [/gray