Cephalexin is a commonly prescribed antibiotic in Australia, used to treat a variety of bacterial infections including respiratory tract infections, skin infections, urinary tract infections, and more. Understanding the correct dosage is essential for effective treatment and minimizing side effects. This blog post provides a clear overview of the typical cephalexin dosing guidelines for adults in Australia, based on current clinical recommendations and product information.
Standard Adult Dosage of Cephalexin
In Australia, the usual adult dose of cephalexin ranges from 1 gram to 4 grams per day, divided into multiple doses. The most common dosing schedule is:
- 250 mg every 6 hours (four times daily)
Alternatively, for certain infections or patient preferences, cephalexin can be prescribed as:
- 500 mg every 12 hours (twice daily)
The exact dose and frequency will depend on the type and severity of the infection, as well as the patient’s overall health.
Specific Dosage Recommendations by Infection Type
- Mild to moderate infections such as streptococcal pharyngitis, tonsillitis, uncomplicated urinary tract infections, and skin infections often respond well to 250 mg every 6 hours or 500 mg every 12 hours.
- More severe infections or those caused by less susceptible bacteria may require higher doses, up to 4 grams daily, divided into two to four doses.
- Treatment duration typically lasts between 7 to 14 days, but may be extended depending on clinical response and infection type. For example, streptococcal infections generally require at least 10 days of therapy to prevent complications.
How to Take Cephalexin
- Cephalexin capsules should be swallowed whole with a glass of water.
- It can be taken with or without food; however, taking it with food may help reduce stomach upset.
- To maintain consistent blood levels of the antibiotic, doses should be taken at evenly spaced intervals, ideally at the same times each day.
- It is important to complete the full prescribed course, even if symptoms improve early, to ensure complete eradication of the infection and prevent resistance.
Dosage Adjustments for Special Populations
- Renal impairment: Dosage adjustments may be necessary for patients with kidney problems. For example, patients with moderate to severe renal impairment may require reduced doses or extended dosing intervals.
- Older adults: Generally follow standard dosing but should be monitored for side effects and renal function.
- Pregnancy and breastfeeding: Cephalexin is considered relatively safe but should be used under medical supervision.
When to Consult Your Doctor
- If you miss a dose, take it as soon as you remember unless it is near the time for your next dose. Do not double doses.
- Contact your healthcare provider if you experience severe side effects such as allergic reactions, persistent diarrhea, or if your infection does not improve within a few days.
- Always inform your doctor about other medications you are taking to avoid potential drug interactions.
Summary
For adults in Australia, cephalexin is typically prescribed at 250 mg every six hours or 500 mg every 12 hours, with total daily doses ranging from 1 to 4 grams depending on the infection severity. Proper adherence to dosing schedules and completing the full course are critical for successful treatment. Always follow your healthcare provider’s instructions and consult them if you have any questions or concerns about your cephalexin therapy.