Bental is used for treating irritable bowel syndrome and it can cause lightheadedness, nausea and dizziness, confusion and fainting etc. But it does not cause the symptoms you are currently experiencing, however, you can discontinue the medication if you think its responsible for the symptoms you have going on to see if that helps.
Electrical pain radiating down the leg from the spine is usually a sign of nerve impingement which is unrelated to the diverticulitis and the medication. It should be taken as a separate entity and treated as such. I would advise that you get some bed rest, avoid odd postures and start on an anti inflammatory medication like Aleve (Naproxen) 500 mg twice a day, a hot bath at night and massage of the upper and lower back with anti inflammatory liquigel like Ibuprofen gel four times a day.
In diverticulitis, the best thing to do is to stay on a low fiber diet till the symptoms have subsided and to gradually slide in to a high fiber diet after a couple of weeks.
Juices, broths, ice pops, white bread, poultry and meat etc.
Hope this helps.
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