Wife (female, 68) Has Been Sick With Bladder Infection Most

wife (female, 68) has been sick with bladder infection most of week. temp spikes around 100 for past few days. after 45-60 minutes of chills and complaints of cold, she now fever back again that has spiked to 104. has been taking Advil, alternated with Tyenol and applying cold compresses. doctor ordered NITROFURANTOIN MCR 100MG x 2 daily.