Quote:
"Morphine and morphine-like drugs (such as oxycodone, fentanyl and buprenorphine) are the strongest painkillers there are.
Depending on your individual circumstances, these types of painkiller may be prescribed as a patch, an injection, or sometimes in a pump you control yourself.
But they all work in similar ways and should only be used for severe pain.
They'll only be prescribed after consultation with a doctor or a pain specialist. The dose and your response will be closely monitored"
Source:
https://www.nhs.uk/live-well/healthy-body/which-painkiller-to-use/
There's more about morphine here:
https://www.nhs.uk/medicines/morphine/
I've only ever been given morphine once, when I had to call a doctor out on Boxing Day due to me suffering from orchitis. (It's the swelling of a testicle to several times its normal size. If a man can ever experience a pain like that of childbirth, orchitis must come very close to it!). The doctor gave me tablets straight from his bag, rather than from a pharmacy, and repeatedly warned me that taking a double dose would be fatal. (He insisted on calling in a witness to his warnings too). I took just one tablet and, within a very short space of time, my whole body had gone completely numb. (Think of what your gum feels like when a dentist gives you an anaesthetic injection and then expand that to the whole of your body; you could have plunged a knitting needle anywhere into my body and I wouldn't have felt it!)
So there are some very strong painkillers available from your GP but he/she certainly won't rush to offer them to you.
I hope that you find some relief soon. (If your GP's surgery doesn't open on Saturdays, try calling 111 to see if they'll refer you to an out-of-hours GP).