@ZipLine-- Yes, it's normal to have urine with odor while taking antibiotics, it's a common occurrence. Remember that drugs are being excreted through urine after they are processed.
I think I had a little bit of fatigue when I was on flucloxacillin, but it may have been due the infection as well. I mostly had upset stomach, but it was not so bad when I took the medication on a full stomach and along with a glass of milk. Flucloxacillin is a fairly strong drug, so it can be tough on the stomach because that's where it's absorbed. But eating well before will reduce some of these symptoms.
I don't agree that flucloxacillin is not worth the side effects though. It's a valuable antibiotic and is very effective for some types of severe infections and that's why it is prescribed. Flucloxacillin saved my life.