My mother is on levaquin for a urinary tract infection which had ...

My mother is on levaquin for a urinary tract infection which had gotten worst than we thought . The infection had set up in pockets behind her rectum. She is on levaquin, and other medicines such as; digoxin, metoprolol, lipitor, diltiazem and lasix. I am so afraid she is on medicines that can do more harm than good. She also suffers from congested heart failure. After she returned home from the hospital stay she extremely weak, is this a results of taking the antibiotic ( levaquin or a combination of all of the drugs listed above)?