Nitrofurantoin
"Had suspected UTI (AGAIN!) for past 2 weeks. GP prescribed Nitrofurantoin today. Took one 50 g pill with dinner and water this evening but  hours later am still feeling awful. Have sense of being spaced out and confused.  have been sitting quietly, no tv, for hours as this was quite scary. Couldn't concentrate on tv or book. Don't know if I should continue with this and take 2nd pill, or just get usual alternative tomorrow, can't remember name of it.  Any advice would be grateful thanks."