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Home / Antibiotics / Cephalexin


Cephalexin belongs to the class of first-generation cephalosporin antibiotic. It is effective in treating different bacterial infections like urinary tract infection, bone infection, ear infection and skin infection.

Cephalexin 250mg

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What is Cephalexin uses? 

Cephalexin is used for treating infections that are caused by bacteria such as skin infections, sinus infection, bone infections, tooth infection, ear infections as well as urinary tract infections.  

This drug belongs to the class of first-generation cephalosporin antibiotic. It mainly works by stopping the growth of bacteria.  

Remember Cephalexin monohydrate is not going to treat any kind of viral infections such as common cold and flu.  

There is also a decreased effectiveness of antibiotic if it is misused or used unnecessarily.  

Cephalexin generic drug is available in the brand name of Daxbia and Keflex.  

This medicine is similar to penicillin in action as well as side effects. It is cephalexin a strong antibiotic which effectively treats bacterial infections.  

Cephalexin is easily available in different strengths at a reasonable price on different online pharmacy.  

Therefore, before taking this medication for treating bacterial vaginosis (BV) do consult your doctor once.  

What is Cephalexin dosage? 

Always remember that you should take this medicine exactly in the same manner as recommended by your doctor. You need to strictly follow all the directions that are mentioned on the prescription label.  

You should never use this drug in smaller or larger amounts or for a longer time than recommended by your doctor as it can lead to severe side effects.  

Cephalexin monohydrate should never be used for treating any condition which has not been checked by the doctor.  

Cephalexin tablet should always be taken by mouth with or without the food as recommended by your doctor mainly every 6 to 12 hours.  

This drug is also available in different strengths due to which the dosage is completely based upon your response to the treatment as well as a medical condition.  

In children, the dosage of this drug is completely based upon weight.  

If you are using the oral suspension then shake it well before you measure the dose. The liquid medicine should always be measure with the help of dosing syringe which is provided with the medicine.  

You can also make use of special-dose measuring spoon or medicine cup. Never make use of kitchen spoon for measuring the dose as you might get the wrong dose.  

In case, you have not received the dose-measuring device then contact your doctor once.  

It is important for you to use Cephalexin 250 mg capsule for the full prescribed length of time. There are chances that you might experience that your symptoms have improved even before the infection is completely cleared.  

Skipping the dose can also increase your risk for further infection which is resistant to antibiotics.  

In order to get the best effect, it is important for you to use the antibiotic at evenly spaced times.  

You should take this drug at the same time every day in order to remember taking it.  

Even if you see anyone suffering from the same symptoms as yours, you should never share this drug with him or her.  

This medicine is also known for causing unusual results with some of the medical tests so make sure that you inform your doctor well in advance about this drug.  

All the tablets and capsules should be store at the room temperature right away from direct heat, moisture as well as light.  

Always store the oral liquid suspension in the refrigerator but do not allow it to freeze. If there any unused liquid then throw it away after 14 days.  

Without the permission of the doctor, you should not stop the medicine because it can help bacteria to grow and result in the return of the infection.  

Cephalexin dose for UTI 

Before treating urinary tract infection, it is important for you to know the exact dose of this medicine from your doctor.  

The dose of this medicine for treating UTI is divided between 7 to 14 days.  

Depending upon your medical condition, the doctor will recommend you the dose.  

What if you miss a dose?

In case you miss the dose of this medication then take it immediately as you remember. But if you see that it’s almost the time for your next dose then don’t take the missed dose because two doses should not be taken at the same time. 

Remember that you should never take extra medicine in order to make up the missed dose.  

Can Cephalexin treat strep throat? 

Most of the doctor often prescribes Cephalexin for strep throat to both kids as well as adults who are allergic to penicillin or are not able to take antibiotics like Azithromycin. 

Can Cephalexin be helpful for STD? 

This medication is very helpful in treating sexually transmitted disease. If you are suffering from STD then there are chances that your doctor will recommend Cephalexin for STD.  

It is mainly given as a one-time injection- a dose of 250mg. For treating STD, you should always take this medication under the supervision of the doctor.  

Can cephalexin treat UTI? 

If your doctor has prescribed Cephalexin for UTI then there are complete chances that you will take this drug at home.  

It is one of the effective medications which treat the problem of UTI within 7 to 14 days. Complete the entire course of this treatment even if you start feeling well.  

You require taking this medication as prescribed by your doctor in order to get complete benefit.  

Is cephalexin the same as amoxicillin? 

Both Cephalexin and Amoxicillin are antibiotics that are very helpful in treating different types of bacterial infections.  

Cephalexin is considered as the cephalosporin antibiotic, while amoxicillin is a penicillin-type antibiotic.  

Does Cephalexin work for acne?

This medication is known to be very effective in treating acne. It is mainly used for 7 to 14 days but make sure that you use under the supervision of a doctor.  

Cephalexin contraindications 

There are a few conditions that are known to contradict with this medication. If you are suffering from the following conditions then you should consult your doctor once: 

  • Inflammation of the large intestine
  • Kidney disease with an expected decrease in kidney function
  • Diarrhoea from infection with clostridium difficile bacteria
  • Chronic kidney disease stage 4 and 5

Cephalexin vs. doxycycline 

Cephalexin is a cephalosporin antibiotic which is just like the penicillin in actions and side effects.  

Doxycycline belongs to the class of tetracycline which is used for treating different infections like respiratory tract infections.  

Since no interactions have been found between the two medicines but you should always take it under the supervision of the doctor.  

What can you not take with cephalexin? 

Remember that antibiotic medicines are known for causing diarrhoea which is considered as the sign of an infection. If you have diarrhoea which is watery or bloody then you need to contact your doctor immediately.  

Do not use any kind of anti-diarrhoea medicine until and unless your doctor recommends you.   

Cephalexin with alcohol should never be taken as it can cause serious side effects.  

This medicine is known for causing nausea, dizziness and drowsiness. So if you take Cephalexin and alcohol it can instantly increase all these effects.

It is always best to avoid the intake of alcohol while using this drug because it will make you feel worse while you are not well.

Can I take vitamins with cephalexin? 

Although, no interactions have been found while taking vitamins with this medication but there are chances that cephalexin tablet can be affected by the vitamins you are taking.  

So if you are taking any kind of vitamins then inform your doctor about it well in advance to avoid any problem.  

Precautions you need to take while using this medicine 

Before you start taking this medicine, it is important for you to inform your doctor in case you are allergic to it or to penicillin and other cephalosporins like cefpodoxime.  

If you are also suffering from any other allergy tell your doctor well in advance.  

Cephalexin monohydrate is known to have some inactive ingredients due to which it can cause allergic reactions or other problems. You can talk to your doctor once about this in details once.  

Before you start taking this drug, you should tell your doctor about your complete medical history like:

  • Stomach/intestinal disease like colitis
  • Kidney disease
  • Allergy to any drugs mainly penicillin
  • A medical condition which needs blood thinners

The liquid form of this medicine is known to contain sugar so if you are a diabetic patient then ask your doctor once and in order to ensure that it is safe for you to use.  

It is also known for causing some live bacterial vaccines not to work well such as typhoid vaccine.  

Until and unless your doctor tells, you should not go for any kind of immunizations as well as vaccinations.  

Before you go for any surgery, inform your doctor or dentist well in advance about this medication and also all the products that you are using like prescription drugs, nonprescription drugs and herbal products.  

Always keep this medicine out of reach of children and do not share with anyone even if they have the same symptoms like yours.  

Can you take Cephalexin in pregnancy?

This drug is not known for harming an unborn baby. If you are pregnant or planning to get pregnant it is better to consult your doctor once.  

Can a breastfeeding mother take Cephalexin? 

This drug passes into the breast milk due to which it can harm a nursing baby. So, if you breastfeed then you should talk to your doctor once.  

What are the side effects of Cephalexin? 

Always remember that your doctor has prescribed you this medicine because he thinks that the benefit of this medicine is more as compared to the risks of its side effects.  

Many people who are using this drug did not come across any kind of side effects.  

Some of the common side effects of this medication are:

  • Diarrhoea
  • Upset stomach
  • Nausea
  • Vomiting
  • Joint pain
  • Feeling tired
  • Headache

If you use this medication for a long time or for repeated periods then there are chances that you might suffer from new yeast infection and oral thrush.  

If you see white patches in your mouth, change in vaginal discharge or any other kind of new symptoms then get emergency medical help immediately.  

You need to immediately call your doctor if you come across the signs of an allergic reaction to this medicine like swelling of your face, lips, throat o9rr tongue, hives as well as difficulty in breathing.

Contact your doctor once if you suffer from:

  • Little or no urination
  • Serious stomach pain, jaundice
  • Diarrhoea which is bloody or watery
  • Confusion, easy bruising
  • Unusual bleeding from vagina or rectum, nose or mouth
  • Purple or red pinpoints spots under the skin
  • Agitation and hallucinations
  • Serious skin reactions such as sore throat, burning in the eyes, fever and swelling in your face or tongue, skin pain which is followed by a red or purple skin rashwhich spreads and causes peeling and blistering. 

Therefore, this is not the complete list of side effects so if you suffer from anything apart from this list then contact your doctor immediately.  

Cephalexin Interactions 

Drug interactions can completely change how your medications work and can even increase your risk for serious side effects. So it is important for you to inform your doctor about all the medicines or products that you are using beforehand.  

There are total 21 drugs that are known to interact with Cephalexin tablets

3 major drug interactions

18 moderate drug interactions 

Some of the names of drugs that interact with this medication includes aspirin low strength, Lipitor, methadone, etc.  

Cephalexin interactions with metformin 

Using Cephalexin along with metformin can increase the effects of metformin on lowering the blood sugar levels. It will make your blood sugar levels too low.  

Cephalexin interactions with birth control 

If you are taking this medicine then before using any birth control consult your doctor once to know about its interaction.  

Cephalexin warnings 

You should strictly not take this medication if you are allergic to it or to similar antibiotics.  

Take the medicine only for the prescribed time which is recommended by your doctor. 


We only ship medications which are approved by FDA, Also please consult your doctor to make a full decision on what medication to take.

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