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Acute Bacterial Sinusitis In Adults And Community-Acquired Pneumonia
Zmax (azithromycin) is a macrolide antibacterial drug indicated for the treatment with mild to moderate infections caused by susceptible strains of the designated microorganisms in the specific conditions listed below. [See Clinical Studies]
Acute bacterial sinusitis in adults due to Haemophilus influenzae, Moraxella catarrhalis or Streptococcus pneumoniae.
Community-acquired pneumonia in adults and pediatric patients six months of age or older due to Chlamydophila pneumoniae, Haemophilus influenzae, Mycoplasma pneumoniae or Streptococcus pneumoniae, in patients appropriate for oral therapy. Pediatric use in this indication is based on extrapolation of adult efficacy. [See Use in Specific Populations]
Limitations Of Use
Zmax is not recommended for use in patients with pneumonia who are judged to be inappropriate for oral therapy because of moderate to severe illness or risk factors such as any of the following:
- patients with cystic fibrosis,
- patients with nosocomial infections,
- patients with known or suspected bacteremia,
- patients requiring hospitalization,
- elderly or debilitated patients, or
- patients with significant underlying health problems that may compromise their ability to respond to their illness (including immunodeficiency or functional asplenia).
To reduce the development of drug-resistant bacteria and maintain the effectiveness of Zmax (azithromycin) and other antibacterial drugs, Zmax (azithromycin) should be used only to treat infections that are proven or strongly suspected to be caused by susceptible bacteria. When culture and susceptibility information are available, they should be considered in selecting or modifying antibacterial therapy. In the absence of such data, local epidemiology and susceptibility patterns may contribute to the empiric selection of therapy.
DOSAGE AND ADMINISTRATION
Zmax should be taken as a single 2 g dose. Zmax provides a full course of antibacterial therapy in a single oral dose. It is recommended that Zmax be taken on an empty stomach (at least 1 hr before or 2 hr following a meal).
For pediatric patients 6 months and older, Zmax should be taken as a single dose of 60 mg/kg (equivalent to 27 mg/lb) body weight. The Zmax dose in mL is equivalent to the child's weight in lb (1 mL/lb dose, see Table 1 below), for a body weight of less than 75 lb (34 kg). It is recommended that Zmax be taken on an empty stomach (at least 1 hr before or 2 hrs following a meal).
Pediatric patients weighing 75 lb (34 kg) or more should receive the adult dose (2 g).
Table 1: Zmax Pediatric Dosage Guidelines: 1-dose
|Dosing Calculated on 1 mL/lb, Dose 1 mL of Suspension for every 1 lb of Body Weight for Children < 75 lb (34 kg)a|
|Weight||1 mL/lb Dose|
|Lb||Kg||Dose (mg)||Volume (mL)|
|> 75||34||2000||Consume entire contents of bottle|
|a To ensure accurate dosing, a dosing spoon, medicine syringe, or cup is recommended.|
Additional Treatment After Vomiting With Zmax
In the event that a patient vomits within 5 minutes of administration, the health care provider should consider additional antibiotic treatment since there would be minimal absorption of azithromycin. Since insufficient data exist on absorption of azithromycin if a patient vomits between 5 and 60 minutes following administration, alternative therapy should be considered. Neither a second dose of Zmax nor alternative treatment is warranted if vomiting occurs ≥ 60 minutes following administration, in patients with normal gastric emptying. In patients with delayed gastric emptying, alternative therapy should be considered.
Instructions For The Pharmacist
Constitute with 60 mL of water and replace cap. Shake bottle well before dispensing. Do not refrigerate. Constituted suspension should be consumed within 12 hr.
For pediatric dosing in patients weighing less than 75 lb (34 kg), use of a dosing device is recommended. The pharmacist should inform the patient's caregiver that any suspension remaining after dosing MUST be discarded.
Dosage Forms And Strengths
Each bottle of Zmax contains azithromycin dihydrate equivalent to 2 g of azithromycin. After constitution with 60 mL of water, each mL of suspension contains 27 mg of azithromycin. The suspension is a white or off-white color and has a cherry/banana flavor.
Storage And Handling
NDC 0069-4170-34 for combined adult and pediatric use is supplied in bottles containing 2 g of azithromycin and should be constituted with 60 mL of water.
Before constitution, store dry powder at or below 30°C (86°F).
After constitution, store suspension at 25°C (77°F); excursions permitted to 15-30°C (59-86°F) [see USP Controlled Room Temperature]. Do not refrigerate or freeze.
Constituted suspension should be consumed within 12 hr. For adult patients, the entire bottle should be consumed. For pediatric patients, any suspension remaining after dosing MUST be discarded.
Distributed by: Pfizer Labs, Division of Pfizer Inc., NY, NY 10017. Revised: Feb 2016This monograph has been modified to include the generic and brand name in many instances.
Last reviewed on RxList: 6/7/2016
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