GENITOURINARY - UTI - Prophylaxis for recurrent UTIs (re-infections)
Cephalexin (Keflex^®) Generics available Pregnancy: B; Lactation: Unk	Children: 10 mg/kg (max 500 mg) every night at bedtime for 6 months. Adult: 500 mg every night at bedtime for 6 months.	Food: Take 1 hour before or 2 hours after meals. May take with food if GI upset occurs.
Tabs: 250 mg, 500 mg, 1 g -     Caps: 250 mg, 500 mg -   Oral Susp: 125 mg/5 mL, 250 mg/5 mL		Important side effects: GI upset, diarrhea.
Nitrofurantoin* (Macrodantin^®) Generics available Pregnancy: B; (Not at term or in labor) Lactation: Unsafe	Children: 1-2 mg/kg/day (max 100 mg) every night at bedtime for 6 months. 1-2 mg/kg/day 10 kg (22 lb) = ½ tsp (2.5 mL) QHS	Food: Take with food or milk. Important side effects: Nausea, vomiting, darkening of the urine, headache, hepatitis, peripheral neuropathy.
Caps: 25 mg, 50 mg, 100 mg Oral Susp: 25 mg/5 mL Macrobid (extended release): 100 mg	20 kg (44 lb) = 1 tsp (5 mL) QHS 30 kg (66 lb) = 1½ tsp (7.5 mL) QHS 40 kg (88 lb) = 2 tsp (10 mL) QHS Adult: 50-100 mg every night at bedtime for 6 months.
Sulfamethoxazole*/ Trimethoprim (Bactrim^®, Septra^®) Generics available Pregnancy: C; Lactation: Unsafe Single Strength (SS) Tabs: 80 mg/400 mg Double Strength (DS) Tabs: 160 mg/800 mg Oral Susp: 40 mg/200 mg/5 mL	Children ≥2 months: 2mg/kg TMP component every night OR 5 mg/kg TMP component twice a week at bedtime for 6 months. Adult: 1 SS or 1 DS Tablet at bedtime for 6 months.	Food: May take without regard to food. Encourage fluids. Important side effects: Photosensitivity, rash. Reduce dose in renal disease (CrCl <30 mL/min).