urinary tract infection
"by end of day one (2 doses) I felt very tired. Day two I woke up weak, fatigued, achey but was advised to stay on Macrobid as the UTI symptoms had improved. As day wore on (3 doses) I became increasingly tired, no energy, headache, sensation of heart racing, nausea. Another call to provider and they suggested I switch to Cipro. Before I could do that,  an episode of nausea sent me to the bathroom. I passed out, hit my head and ended up hospitalized. I would be very afraid of this medication, considering the other options."