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November 27, 2025
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Brand Name :
Panixine Disperdose, Keflex
Synonyms :
cephalexin
Class :
Cephalosporins, 1st Generation
Brand Name :
Panixine Disperdose, Keflex
Synonyms :
cephalexin
Class :
Cephalosporins, 1st Generation
Dosage forms & Strengths:Â
Adult:Â
Capsule:Â
250 mgÂ
500 mgÂ
750 mgÂ
Tablet:Â
250 mgÂ
500 mgÂ
Oral suspension:Â
125 mg/5 mlÂ
250 mg/5 mlÂ
Genitourinary Tract InfectionsÂ
250
mg
Capsule
Orally 
every 6 hrs
Group A Streptococcal (GAS) InfectionsÂ
250
mg
Capsule
Orally 
every 6 hrs
250
mg
Capsule
Orally 
every 6 hrs
250
mg
Capsule
Orally 
every 6 hrs
250
mg
Capsule
Orally 
every 6 hrs
250
mg
Capsule
Orally 
every 6 hrs
250
mg
Capsule
Orally 
every 6 hrs
Safety and efficacy not established
Group A Streptococcal (GAS) InfectionsÂ
25 - 50
mg/kg
Capsule
Orally 
every 8 hrs
10
days
75 - 100
mg/kg
Capsule
Orally 
every 8 hrs
Genitourinary Tract InfectionsÂ
25 - 50
mg/kg
Capsule
Orally 
every 8 hrs
25 - 50
mg/kg
Capsule
Orally 
every 8 hrs
10
days
25 - 50
mg/kg
Capsule
Orally 
every 8 hrs
10
days
25 - 50
mg/kg
Capsule
Orally 
every 8 hrs
10
days
25 - 50
mg/kg
Capsule
Orally 
every 8 hrs
10
days
500
mg
Capsule
Orally 
every 6 hrs
Refer adult dosing
may diminish the serum concentration when combined with cephalexin
it increases the toxicity of metformin in the serum
cephalexin has the potential to reduce the rate of excretion of idebenone, leading to an elevation in levels of serum
When cefmenoxime is used together with cephalexin, this leads to enhanced risk or seriousness of nephrotoxicity
When cephalexin is used together with proglumetacin, this leads to enhanced risk or seriousness of nephrotoxicity
When cephalexin is used together with benoxaprofen, this leads to enhanced risk or seriousness of nephrotoxicity
cephalexin leads to a reduction in the rate of excretion of eucalyptus oil which leads to increased level of serum
cephalexin leads to a reduction in the rate of excretion of pentaerythritol tetranitrate, which leads to an increased level of serum
cephalexin leads to a reduction in the rate of excretion of potassium acetate, which leads to an increased level of serum
cephalexin leads to a reduction in the rate of excretion of nitric oxide, which leads to an increased level of serum
When cephalexin is used together with difenpiramide, this leads to enhanced risk or seriousness of nephrotoxicity
the presence of piperine in combination with cephalexin could lead to a decreased metabolism of cephalexin
cephalexin: it may decrease the therapeutic efficacy of dextropropoxyphene
cephalexin may decrease the excretion rate of almasilate, leading to higher serum levels
cephalexin increases the concentration of metformin in the serum
it increases the concentration of cephalosporins in the serum
may enhance the metabolism of cephalexin
may have a decrease in excretion when combined with cephalexin
the rate of metabolism of cephalexin may be reduced
the rate of metabolism of cephalexin may be reduced
cephalexin might lead to a reduction in the rate of excretion of telavancin, potentially leading to elevated levels of serum
Cephalexin is an antibiotic that belongs to the cephalosporin class of drugs. It is used to treat a variety of bacterial infections, including infections of the skin, respiratory tract, urinary tract, bones, and joints.
The mechanism of action of cephalexin is similar to other cephalosporin antibiotics. It works by inhibiting the synthesis of the bacterial cell wall, which leads to the death of the bacteria.
Cephalexin has a broad spectrum of activity, which means it is effective against a wide range of bacteria. It is particularly effective against gram-positive bacteria, such as staphylococci and streptococci, but it also has some activity against gram-negative bacteria, such as Escherichia coli and Klebsiella pneumoniae.
It is important to note that cephalexin is not effective against infections caused by viruses, such as the common cold or flu. It should only be used to treat bacterial infections. It is also important to take the full course of treatment as prescribed by your healthcare provider, even if you start feeling better after a few days, to ensure that the infection is completely cleared.
Frequency undefined:Â
Abdominal painÂ
AnemiaÂ
AngioedemaÂ
AgitationÂ
DizzinessÂ
DiarrheaÂ
DyspepsiaÂ
ConfusionÂ
Eosinophilia hemolyticÂ
Elevated transaminasesÂ
Epidermal necrolysisÂ
FatigueÂ
Genital pruritisÂ
GastritisÂ
HeadacheÂ
HallucinationsÂ
Hemolytic anemiaÂ
NeutropeniaÂ
NephritisÂ
ThrombocytopeniaÂ
Toxic epidermal necrolysisÂ
Vaginal dischargeÂ
VomitingÂ
The black box warning for cephalexin is a cautionary warning that appears on the label of the medication and indicates that there are serious or life-threatening risks associated with its use.
The black box warning for cephalexin specifically states that the drug can cause severe hypersensitivity reactions, including anaphylaxis, which can be life-threatening. It also warns that cephalexin can cause a false-positive result on certain urine glucose tests, leading to a misdiagnosis of diabetes.
It is important for patients and healthcare providers to be aware of these risks and to use caution when prescribing or taking cephalexin. Patients should immediately report any unusual symptoms or reactions to their healthcare provider.
There are several contraindications for the use of cephalexin, including:
It is important to inform your doctor of any allergies or medical conditions you may have before taking cephalexin.
Pregnancy consideration:Â Â
No complete data is availableÂ
Breastfeeding warnings:Â Â
Category C.Â
Pregnancy category:Â
Cephalexin is a type of antibiotic known as a cephalosporin. It works by inhibiting the synthesis of the bacterial cell wall, which leads to the death of the bacteria.
Cephalexin is primarily used to treat infections caused by gram-positive bacteria, such as Staphylococcus aureus and Streptococcus pneumoniae. It is also effective against some gram-negative bacteria, including Escherichia coli and Klebsiella pneumoniae.
Cephalexin is usually taken by mouth in the form of a capsule or tablet. It is absorbed from the gastrointestinal tract and is widely distributed throughout the body. The half-life of cephalexin is approximately 1 hour, meaning that it is eliminated from the body relatively quickly.
Cephalexin is generally well tolerated by most people, but it can cause side effects such as nausea, diarrhea, and allergic reactions. It may also interact with other medications, so it is important to inform your healthcare provider about all medications you are taking.
Overall, cephalexin is a useful antibiotic that is effective against a wide range of bacterial infections. It is important to use it as directed by a healthcare provider to ensure that the infection is properly treated and to minimize the risk of antibiotic resistance.
Cephalexin is typically administered orally in the form of a capsule or tablet.
It is usually taken every 6-12 hours, depending on the specific prescription and the severity of the infection being treated.
It should be taken with a full glass of water and should not be crushed or chewed.
It is important to take the medication exactly as prescribed by a healthcare professional and to complete the full course of treatment, even if symptoms improve.
It is also important to avoid missing doses or skipping doses, as this can lead to the development of antibiotic resistance.
If you have any questions or concerns about the administration of cephalexin, be sure to speak with your healthcare provider.
Patient information leafletÂ
Generic Name: cephalexinÂ
Pronounced: cef-a-lex-inÂ
Why do we use cephalexin?Â
Cephalexin belongs to the category of antiplatelet agents. It is used to treat genitourinary tract infections, bone infections, uncomplicated cystitis, otitis media, skin/skin structure infections, respiratory tract infections, streptococcal pharyngitis, cellulitis, and mastitis.Â
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