What are Keflex and Augmentin?
Keflex and Augmentin are both prescription antibiotics used to treat bacterial infections. Keflex is a brand name for cephalexin, a first-generation cephalosporin antibiotic. Augmentin is a combination drug containing amoxicillin, a penicillin-type antibiotic, and clavulanate potassium, a beta-lactamase inhibitor. The addition of clavulanate potassium helps Augmentin overcome resistance mechanisms in some bacteria that would otherwise make amoxicillin ineffective.
What infections do Keflex and Augmentin treat?
Keflex is commonly prescribed for a range of bacterial infections affecting the skin, bones, ears, and urinary tract [1]. Augmentin is typically used for more serious or difficult-to-treat infections, including respiratory tract infections, urinary tract infections, skin infections, and bone infections, particularly those caused by bacteria that produce beta-lactamase enzymes [2].
How do Keflex and Augmentin differ in their mechanism of action?
Both Keflex and Augmentin work by interfering with the formation of bacterial cell walls, ultimately leading to bacterial death. However, Augmentin has an advantage in treating infections caused by bacteria that have developed resistance to amoxicillin alone. The clavulanate potassium component in Augmentin inhibits beta-lactamase enzymes, which are produced by some bacteria to break down penicillin-like antibiotics. Keflex, being a cephalosporin, also targets bacterial cell wall synthesis but has a different spectrum of activity and is less susceptible to certain types of beta-lactamase enzymes compared to amoxicillin alone.
What are the potential side effects of Keflex and Augmentin?
Common side effects for both medications can include gastrointestinal issues like nausea, vomiting, and diarrhea. Other potential side effects for Keflex include dizziness and headache, while Augmentin may also cause rash and yeast infections [1][2]. Serious side effects, though less common, can occur with both drugs. For Augmentin, a notable concern can be severe diarrhea due to Clostridioides difficile infection.
When would a doctor prescribe Keflex over Augmentin, or vice versa?
The choice between Keflex and Augmentin depends on the specific type of bacterial infection, the suspected or confirmed causative bacteria, and the patient's medical history, including any known allergies or previous antibiotic use. Keflex might be preferred for less severe infections or when the bacteria are known to be susceptible to cephalexin. Augmentin is often chosen for infections where there's a higher likelihood of bacterial resistance to amoxicillin alone, or for more severe infections that require broader coverage [2].
Are there any drug interactions to be aware of with Keflex or Augmentin?
Patients should inform their healthcare provider about all medications they are currently taking, including over-the-counter drugs and supplements. Both Keflex and Augmentin can interact with certain medications. For example, probenecid can increase the blood levels of both cephalexin and amoxicillin. Additionally, both antibiotics can potentially reduce the effectiveness of oral contraceptives, so alternative birth control methods may be recommended during treatment [1][2].
What is the typical duration of treatment for Keflex and Augmentin?
The duration of treatment with Keflex or Augmentin varies depending on the severity and location of the infection. Prescribed courses typically range from 7 to 14 days, but may be longer for certain conditions. It is crucial for patients to complete the entire course of antibiotics as prescribed by their doctor, even if they start feeling better, to ensure the infection is fully eradicated and to prevent the development of antibiotic resistance [1][2].