Hello Joy.

Have you tried Tramadol? (UK name).

I know exactly how you feel having went through years of utter hell with sciatica. I had to resign from my last job due to it. I've tried too many drugs to mention none of which helped at all because my doctors were reluctant to prescribe opioids or synthetic opioids, so I'll keep this short without getting into the saga of my own experience.

The only thing that eventually worked for me was Tramadol. It was total relief, amazing.
I found my dose for pain loss was initially 2x 50mg capsules around 6 hours appart which can be increased if needs be.

They can make you feel a bit "woozy" when you first take them but that only lasted a couple of days and was replaced by a warm relaxed feeling and total pain relief.

I'm sad to say I built up a high tolerance during a sciatica bout of almost a year and no longer take it hoping the efficacy returns one day.

I currently take Zomorph for an undiagnosed chronic abdominal tenderness and pain problem (perhaps some form of fibromyalgia) I picked up last year so taking that helps with the sciatica as a side bonus. It's not total relief because of my opioid tolerance via the Tramadol but helps turn the pain volume down.

Good luck.