Cephalexin is an oral antibiotic belonging to the first-generation cephalosporin class. It is used to treat a variety of bacterial infections, including respiratory tract infections, skin and bone infections, and genitourinary tract infections [1]. It works by inhibiting bacterial cell wall synthesis [1].
What bacterial infections does cephalexin treat?
Cephalexin is effective against many common bacterial strains. It is prescribed for infections of the ear, nose, and throat, such as strep throat and tonsillitis. It also treats urinary tract infections, skin infections like impetigo and infected cuts, and certain types of pneumonia. Additionally, it can be used for bone infections and certain sexually transmitted diseases [1].
How does cephalexin work?
As a cephalosporin antibiotic, cephalexin interferes with the production of peptidoglycan, a crucial component of bacterial cell walls. By weakening the cell wall, cephalexin causes the bacteria to rupture and die [1].
When does cephalexin patent exclusivity expire?
Cephalexin is a well-established antibiotic and its original patents have long since expired. This means that generic versions have been available for many years [2].
Can I get a generic version of cephalexin?
Yes, due to patent expiry, generic versions of cephalexin are widely available and are typically prescribed by healthcare providers. These generic formulations offer the same therapeutic benefits as the brand-name drug but at a lower cost [2].
What are the common side effects of cephalexin?
Common side effects of cephalexin include nausea, vomiting, diarrhea, and abdominal discomfort. Some individuals may experience allergic reactions, such as rash or itching, and yeast infections can occur due to disruption of normal flora. More serious side effects are rare but can include severe diarrhea or C. difficile infection [1].
How does cephalexin compare to other antibiotics?
Cephalexin is a first-generation cephalosporin, meaning it is generally most effective against Gram-positive bacteria and has limited activity against Gram-negative bacteria compared to later-generation cephalosporins. For instance, amoxicillin, a penicillin antibiotic, is often used for similar infections, though the specific choice depends on the suspected or confirmed bacteria and individual patient factors [3]. Other cephalosporins, like cefuroxime or ceftriaxone, belong to later generations and offer broader spectrum activity, particularly against Gram-negative organisms [3].
Are there any drug interactions with cephalexin?
Cephalexin can interact with certain medications. For example, probenecid can increase the blood levels of cephalexin. Antacids and food can decrease the absorption of cephalexin. Patients should inform their healthcare provider about all medications they are taking before starting cephalexin [1].
What is the typical dosage and administration for cephalexin?
Dosage for cephalexin varies depending on the type and severity of the infection, as well as the patient's age and kidney function. It is typically taken orally every six hours, or four times a day. It can be taken with or without food [1].
Who manufactures cephalexin?
Because cephalexin is an older, off-patent drug, many pharmaceutical companies manufacture generic versions. Original brand names may have existed historically, but the market is now dominated by generic producers [2].
Sources:
1. https://www.drugpatentwatch.com/drug/cephalexin
2. https://www.drugpatentwatch.com/about-drug-patents
3. https://www.drugpatentwatch.com/drugs/antibiotics