Hi there, been searching a lot lately for some good b-lactam antibiotic to treat my IBS and high intestinal serotonin metabolism. I have very serious problem with bowel motility, there is nothing and i mean nothing that make things move in there without significant side effects. I am looking however for the best b-lactam antibiotic to try and lower the elastase activity and see if my intestines recover a bit. Its unbelievable how numb i feel in there, like i am on a very high dose of SSRI antidepressants. All this happened after the 2nd infection i got with an enterovirus. Previously i had moderate to severe intestinal motility issues now they are extremely difficult to cope with. any ideas or other suggestions ??