Nitrofurantoin macrocrystals 50 to 100 mg 4 times daily for 7 days, or nitrofurantoin monohydrate 100 mg twice daily for 7 days.

• 呋喃妥英、粗晶呋喃妥因50到100毫克每日4的次，7天或者呋喃妥英一水化物100毫克每日两次，7天。