Cephalosporins; Types, Uses, Contraindications, Side Effects, Interactions,

Last updated: February 7, 2026Reviewed date: February 7, 2026Reading time: 5 min read

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বাংলা রোগী নোট এখনো যোগ করা হয়নি। পোস্ট এডিটরে “RX Bangla Patient Mode” বক্স থেকে সহজ বাংলা সারাংশ যোগ করুন।

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Article Summary

Cephalosporins are a large group of B-lactam antibiotics that are closely related to the penicillins. Cephalosporins penetrate well into most body fluids and the ECF of most tissues, especially when inflammation (which enhances diffusion) is present. Cephalosporins are bactericidal and have the same mode of action as other β-lactam antibiotics (such as penicillins), but are less susceptible to β-lactamases. Mechanistically, they inhibit cell-wall synthesis and kill bacteria in...

Key Takeaways

This article explains Types / Classification of Cephalosporins in simple medical language.
This article explains Mechanism of Action of Cephalosporins in simple medical language.
This article explains Indications of Cephalosporins in simple medical language.
This article explains Contraindications of Cephalosporins in simple medical language.

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Emergency safety firstUrgent warning signs are highlighted below.

Seek urgent medical care if you notice

These warning signs are general safety guidance. Local emergency numbers and clinical judgment should always come first.

Severe symptoms, breathing difficulty, fainting, confusion, or rapidly worsening illness.
New weakness, severe pain, high fever, or symptoms after a serious injury.
Any symptom that feels urgent, unusual, or unsafe for the patient.

Emergency now

Use emergency care for severe, sudden, rapidly worsening, or life-threatening symptoms.

See a doctor

Book a professional medical evaluation if symptoms persist, worsen, recur often, affect daily activities, or occur in a high-risk patient.

Learn safely

Use this article to understand possible causes, tests, treatment options, prevention, and questions to ask your clinician.

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Definition

Cephalosporins are a large group of B-lactam antibiotics that are closely related to the penicillins. Cephalosporins penetrate well into most body fluids and the ECF of most tissues, especially when infection, or irritation, often causing pain, swelling, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।" data-rx-term="inflammation" data-rx-definition="Inflammation is the body’s response to injury, infection, or irritation, often causing pain, swelling, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।">inflammation (which enhances diffusion) is present. Cephalosporins are bactericidal and have the same mode of action as other β-lactam antibiotics (such as penicillins), but are less susceptible to β-lactamases. Mechanistically, they inhibit cell-wall synthesis and kill bacteria in a manner similar to the penicillins.

Types / Classification of Cephalosporins

1st Generation	Cefacetrile Cefadroxil Cefalexin Cefaloglycin Cefalonium Cefaloridine Cefalotin Cefapirin Cefatrizine Cefazaflur Cefazedone Cefazolin Cefradine Cefroxadine Ceftezole

2nd Generation	Cefaclor Cefonicid Cefprozil Cefuroxime Cefuzonam Antianaerobe activity Cefmetazole Cefotetan Cefoxitin The following cephems are cephalosporins Cefaclor Cefotetan Cephamycin (Cefoxitin Cefprozil Cefuroxime Cefuroxime axetil Cefamandole Cefminox Cefonicid Ceforanide Cefotiam Cefbuperazone Cefuzonam Cefmetazole Carbacephem

3rd Generation	Cefixime Ceftriaxone Antipseudomonal (Ceftazidime Cefoperazone) Cefdinir Cefcapene Cefdaloxime Ceftizoxime Cefmenoxime Cefotaxime Cefpiramide Cefpodoxime Ceftibuten Cefditoren Cefetamet Cefodizime Cefpimizole Cefsulodin Cefteram Ceftiolene Oxacephem Latamoxef Antipseudomonal activity Cefoperazone Ceftazidime These cephems are also sometimes grouped with third-generation cephalosporins: Oxacephems

4th Generation	Cefclidine Cefepime Cefluprenam Cefoselis Cefozopran Cefpirome Cefquinome These cephems are also fourth-generation cephalosporins Oxacephems: Flomoxef Note:Cefquinome is not approved for human use. It is for veterinary medicine.

5th Generation	Ceftobiprole Ceftaroline Ceftolozane

Other: Generation	These cephems have progressed far enough to be named, but have not been assigned to a particular generation Cefaloram Cefaparole Cefcanel Cefedrolor Cefempidone Cefetrizole Cefivitril Cefmatilen Cefmepidium Cefoxazole Cefrotil Cefsumide Ceftioxide Cefuracetime Nitrocefin

Mechanism of Action of Cephalosporins

Cephalosporins are bactericidal and have the same mode of action as other β-lactam antibiotics (such as penicillins), but are less susceptible to β-lactamases. Cephalosporins disrupt the synthesis of the peptidoglycan layer forming the bacterial cell wall. The peptidoglycan layer is important for cell wall structural integrity. The final transpeptidation step in the synthesis of the peptidoglycan is facilitated by penicillin-binding proteins (PBPs). PBPs bind to the D-Ala-D-Ala at the end of muropeptides (peptidoglycan precursors) to crosslink the peptidoglycan. Beta-lactam antibiotics mimic the D-Ala-D-Ala site, thereby irreversibly inhibiting PBP crosslinking of peptidoglycan.

Indications of Cephalosporins

Urinary Tract Infection – e.g. cystitis, cystourethritis, uncomplicated pyelonephritis.
Otitis Media – Otitis caused by Haemophilus influenzae, Moraxella catarrhalis and Streptococcus pyogenes.
Tonsillitis
Bronchitis
Sinusitis.
Pharyngitis caused by Streptococcus pyogenes.
Pneumonia caused by Streptococcus pneumoniae and Haemophilus influenzae.
Typhoid fever.
Enteric fever
Gonorrhea
Osteomyelitis
Prevention of Chronic Kidney Disease (CKD) / Renal Hypodysplasia, Nonsyndromic
Cervicitis, Vaginitis
Acute bronchitis and acute exacerbations of chronic bronchitis caused by Streptococcus pneumoniae and Haemophilus influenzae
Gonococcal Infection – Uncomplicated or Disseminated
STD Prophylaxis
Acute Bacterial Exacerbation of Chronic Bronchitis (ABECB)
Bacterial Infections
Bloodstream Infections
Bone and Joint Infections
Gonorrhea
Impetigo
Infected animal bite
Lower Respiratory Tract Infection (LRTI)

Contraindications of Cephalosporins

Clostridium difficile infection
The decrease in the Blood-Clotting Protein Prothrombin
Increased risk of bleeding due to the clotting disorder
Liver problems
Kidney disease with the reduction in kidney function
Allergies to cephalosporins & beta-lactams
Hypersensitivity to the active substance or to any of the excipients
Patients with known hypersensitivity to cephalosporin antibiotics.
History of severe hypersensitivity (e.g. anaphylactic reaction) to any other type of beta-lactam antibacterial agent (penicillins, monobactams, and carbapenems).

Side Effects Cephalosporins

The most common

Constipation
Diarrhea
chest pain
a headache
joint painPain
dizziness
nausea and vomiting
Severe stomach ache
anorexia,
flatulence,
a headache,
dizziness,
fainting, fast or pounding heartbeats.
Jarisch/Herxheimer reaction. This is a short-term reaction seen after bacterial infections. সহজ বাংলা: ব্যাকটেরিয়ার সংক্রমণের ওষুধ।" data-rx-term="antibiotic" data-rx-definition="An antibiotic is a medicine used to treat bacterial infections. সহজ বাংলা: ব্যাকটেরিয়ার সংক্রমণের ওষুধ।">antibiotic treatment for certain diseases. Symptoms can include fever, chills, or muscle pain.

More common

diarrhea
fever
the general feeling of illness or discomfort
a pain in the head or upper neck. সহজ বাংলা: মাথাব্যথা।" data-rx-term="headache" data-rx-definition="Headache means pain in the head or upper neck. সহজ বাংলা: মাথাব্যথা।">headache
itching of the vagina or genital area
pain during sexual intercourse
rigidity
sweating
thick, white vaginal discharge with no odor or with a mild odor

Less common

Black, tarry stools
chest pain
a cough
loose stools
painful or difficult urination
shortness of breath
a sore throat
sores, ulcers, or white spots on the lips or in the mouth
swollen glands
unusual bleeding or bruising
unusual tiredness or weakness

Rare

Back, leg, or stomach pains
bladder pain
bleeding gums
bloody or cloudy urine
body aches or pain
burning while urinating
difficulty with breathing
ear congestion
fast, pounding, or irregular heartbeat or pulse
frequent urge to urinate
loss of appetite
lower back or side pain
nasal congestion
nausea or vomiting
pain or tenderness around the eyes and cheekbones
swelling of the joints
the tightness of chest or wheezing
white or brownish vaginal discharge
white patches in the mouth or throat or on the tongue
white patches with diaper rash
yellowing of the eyes or skin
Blistering, peeling, or loosening of the skin
bloody, black, or tarry stools
a cough or hoarseness
fever with or without chills
the general feeling of tiredness or weakness

Drug Interactions of Cephalosporins

Cephalosporins may interact with the following drugs, supplements & may change the efficacy of the drug

aminoglycoside antibiotics (e.g., amikacin, gentamicin, tobramycin)
antacids (e.g., aluminum hydroxide, calcium carbonate, magnesium hydroxide)
H2 antagonists (e.g., famotidine, ranitidine)
BCG
BCG vaccine
birth control pills
probenecid
sodium picosulfate
typhoid vaccine
warfarin

References

Cephalosporins; Types, Uses, Contraindications, Side Effects, Interactions,

Safety note: This is not a prescription or diagnosis. For severe symptoms, pregnancy danger signs, children with serious illness, chest pain, breathing difficulty, stroke-like weakness, or major injury, seek urgent care.

Which doctor may help?

Start with a registered doctor or the nearest qualified health center.

What to tell the doctor

Write when the problem started and how it changed.
Bring old prescriptions, investigation reports, and current medicines.
Write allergies, pregnancy status, diabetes, kidney/liver disease, and major past illnesses.
Bring one family member if the patient is weak, elderly, confused, or a child.

Questions to ask

What is the most likely cause of my symptoms?
Which danger signs mean I should go to hospital quickly?
Which tests are necessary now, and which can wait?
How should I take medicines safely and what side effects should I watch for?
When should I come for follow-up?

Tests to discuss

Vital signs: temperature, pulse, blood pressure, oxygen saturation
Basic physical examination by a clinician
CBC, urine test, blood sugar, or imaging only when clinically needed

Avoid these mistakes

Do not use antibiotics, steroid tablets/injections, or strong painkillers without proper medical advice.
Do not hide pregnancy, kidney disease, ulcer, allergy, or blood thinner use.
Do not delay emergency care when danger signs are present.

Medicine safety and first-aid guide

This section is for patient education only. It does not replace a doctor, pharmacist, or emergency care.

Safe first steps

Avoid heavy lifting, sudden bending, and prolonged bed rest.
Use comfortable posture and gentle movement as tolerated.
Discuss physiotherapy, X-ray, or MRI only when clinically needed.

OTC medicine safety

For mild back pain, pain-relief medicine may be discussed with a doctor or pharmacist.
Avoid repeated painkiller use if you have kidney disease, stomach ulcer, uncontrolled blood pressure, or are taking blood thinners.

Avoid these mistakes

Do not start antibiotics without a proper medical decision.
Do not use steroid tablets or injections casually for quick relief.
Do not delay emergency care because of home remedies.

Get urgent help if

Back pain with leg weakness, numbness around private area, loss of urine/stool control, fever, cancer history, or major injury needs urgent care.

Medicine names, dose, and timing must be decided by a qualified clinician or pharmacist after checking age, pregnancy, allergy, other diseases, and current medicines.

For rural patients and family caregivers

Patient health record and symptom diary

Write your symptoms, medicines already taken, test results, and questions before visiting a doctor. This note stays on your device unless you print or copy it.

Doctor to discuss: Medicine doctor / pediatrician for children / qualified clinician

Tests to discuss with doctor

Temperature chart and hydration assessment
CBC with platelet count if fever persists or dengue/other infection is possible
Urine test, malaria/dengue tests, chest evaluation, or blood culture only when clinically indicated

Questions to ask

What is the most likely cause of my symptoms?
Which warning signs mean I should go to emergency care?
Which tests are really needed now?
Which medicines are safe for my age, pregnancy status, allergy, kidney/liver/stomach condition, and current medicines?
Do I need antibiotics, or is this more likely viral?

Emergency warning signs such as chest pain, severe breathing difficulty, sudden weakness, confusion, severe dehydration, major injury, or loss of bladder/bowel control need urgent medical care. Do not wait for online information.

Go to emergency care if you notice:

Severe or rapidly worsening symptoms
Breathing difficulty, chest pain, fainting, confusion, severe weakness, major injury, or severe dehydration

Doctor / service to discuss: Qualified healthcare provider; specialist depends on symptoms and examination.

Step 1
Check danger signs first

If danger signs are present, seek emergency care and do not wait for online information.
Step 2
Record the symptom story

Write when symptoms started, severity, medicines already taken, allergies, pregnancy status, and test results.
Step 3
Visit a qualified clinician

A doctor, nurse, or qualified healthcare provider can examine you and decide which tests or treatment are needed.
Step 4
Do only useful tests

Do tests after clinical assessment. Avoid unnecessary tests, random antibiotics, or repeated medicines without diagnosis.
Step 5
Follow up and return early if worse

If symptoms worsen, new warning signs appear, or treatment is not helping, return for review quickly.

Rural patient practical tips

Take a written symptom diary and all previous prescriptions/test reports.
Do not hide medicines already taken, even herbal or over-the-counter medicines.
Ask which warning signs mean urgent referral to hospital.

This roadmap is for education. A real diagnosis and treatment plan requires history, examination, and clinical judgment.

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Frequently Asked Questions

Is this article a replacement for a doctor?

No. It is educational content only. Patients should consult a qualified clinician for diagnosis and treatment.

When should I seek urgent care?

Seek urgent care for severe symptoms, rapidly worsening condition, breathing difficulty, severe pain, neurological changes, or any emergency warning sign.

References

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Cephalosporins; Types, Uses, Contraindications, Side Effects, Interactions,

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