there very good for pain relief , but feck me do they knock my gut about, + very sick feeling with them . I take tramadol /paracetamol= tramerset , for sciatica had bad back 40 years, had at beginning 3 slipped discs , now left with sciatica . it never leaves you just start to handle the pain as best as you can, I try to keep active as I can by lots of walking, day and lamping I am lucky asi am slim so don't carry an excess weght, which is a killer for bsd backs. but sometimes which is a lot I will lie down for couple hours to rest my back, and I find it helps me. I hope I don't have to