Low Back Pain - Chemical Substances

   I do not advise you, because the problem will remain and will get worse over time. If there is no option to go to the doctor, you can try yoga exercises. They stretch and have a good effect on back problems. The other thing I can advise you is to lift something heavy or bend at all, to do it from your knees (as if you are sitting) and be careful that your knees do not pass in front of your toes. That way you won't burden the waist. However, think about some option to visit a doctor, because if you leave it like this, it can cost you the opportunity to work at all.

   https://poleznite.com/3090/raznoobrazie-ot-obezbolyavasti/ Here is a nice article about the various painkillers and their action. Low back pain combined with hard physical work is not to be underestimated. You may just have muscle / ligament pain, but it can also be a sign of a herniated disc, which is a serious condition and you risk getting worse over time. In any case, you should see a doctor. In addition, most painkillers hit the stomach, liver or kidneys and should not be taken for a long time without medical supervision.

   There are such drugs, they are called opioids, for example Oxycodone, Fentanyl, Morphine, the weaker ones are Codeine, Tramadol, but they are only with a special prescription, I personally use Oxycodone and I know Fentanyl from a doctor who sells them to me without a prescription, but I use them. I take recreation for fun not because I have something. Keep in mind that narcotic painkillers are addictive, especially the first ones I listed. Good luck.