Bleomycin Sulfate – Uses, Dosage, Side Effects, Interactions

Last updated: February 8, 2026Reviewed date: February 8, 2026Reading time: 49 min read
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Bleomycin A2 is the primary bleomycin species in bleomycin sulfate, a mixture of the sulfate salts of several basic glycopeptide antineoplastic antibiotics isolated from Streptomyces verticillus. Bleomycin A2 forms complexes with iron that reduce molecular oxygen to superoxide and hydroxyl radicals which cause single- and double-stranded breaks in DNA; these reactive oxygen species...

For severe symptoms, danger signs, pregnancy, child illness, or sudden worsening, seek urgent medical care.

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

এই তথ্য শিক্ষা ও সচেতনতার জন্য। এটি ডাক্তারি পরীক্ষা, রোগ নির্ণয় বা প্রেসক্রিপশনের বিকল্প নয়।

Article Summary

Bleomycin A2 is the primary bleomycin species in bleomycin sulfate, a mixture of the sulfate salts of several basic glycopeptide antineoplastic antibiotics isolated from Streptomyces verticillus. Bleomycin A2 forms complexes with iron that reduce molecular oxygen to superoxide and hydroxyl radicals which cause single- and double-stranded breaks in DNA; these reactive oxygen species also induce lipid peroxidation, carbohydrate oxidation, and alterations in prostaglandin synthesis and degradation. (NCI04) Bleomycin Sulfate is a mixture of...

Key Takeaways

  • This article explains Mechanism of Action in simple medical language.
  • This article explains Indications in simple medical language.
  • This article explains Contraindications in simple medical language.
  • This article explains Dosage in simple medical language.
Educational health guideWritten for patient understanding and clinical awareness.
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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.
1

Emergency now

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2

See a doctor

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3

Learn safely

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

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Definition

Bleomycin A2 is the primary bleomycin species in bleomycin sulfate, a mixture of the sulfate salts of several basic glycopeptide antineoplastic antibiotics isolated from Streptomyces verticillus. Bleomycin A2 forms complexes with iron that reduce molecular oxygen to superoxide and hydroxyl radicals which cause single- and double-stranded breaks in DNA; these reactive oxygen species also induce lipid peroxidation, carbohydrate oxidation, and alterations in prostaglandin synthesis and degradation. (NCI04)

Bleomycin Sulfate is a mixture of the sulfate salts of basic glycopeptide antineoplastic antibiotics isolated from Streptomyces verticillus. Bleomycin sulfate forms complexes with iron that reduce molecular oxygen to superoxide and hydroxyl radicals which cause single- and double-stranded breaks in DNA; these reactive oxygen species also induce lipid peroxidation, carbohydrate oxidation, and alterations in prostaglandin synthesis and degradation.

Bleomycin is a mixture of glycopeptide antineoplastic antibiotics isolated from the bacterium Streptomyces verticillus. Bleomycin forms complexes with iron that reduce molecular oxygen to superoxide and hydroxyl radicals which cause single- and double-stranded breaks in DNA; these reactive oxygen species also induce lipid peroxidation, carbohydrate oxidation, and alterations in prostaglandin synthesis and degradation.

Mechanism of Action

Although the exact mechanism of action of bleomycin is unknown, available evidence would seem to indicate that the main mode of action is the inhibition of DNA synthesis with some evidence of lesser inhibition of RNA and protein synthesis. As evident in _in vitro_ studies, the DNA-cleaving actions of bleomycin is dependent on oxygen and metal ions. It is believed that bleomycin chelates metal ions (primarily iron) producing a pseudonym that reacts with oxygen to produce superoxide and hydroxide free radicals that cleave DNA.

or

The cytotoxic action of bleomycin results from its ability to cause fragmentation of DNA. Studies in vitro indicate that bleomycin causes the accumulation of cells in the G2 phase of the cell cycle, and many of these cells display chromosomal aberrations, incl chromatid breaks, gaps, and fragments, as well as translocations. Bleomycin appears to cause the scission of DNA by interacting with oxygen and iron(2+). In the presence of oxygen and a reducing agent, such as dithiothreitol, the metallobleomycin complex becomes activated and functions mechanistically as a ferrous oxidase, transferring electrons from iron(2) to molecular oxygen to produce activated species of oxygen. It has also been shown that metallobleomycin complexes can be activated by a reaction with the flavin enzyme, NADPH-cytochrome p450 reductase. Bleomycin binds to DNA through its amino-terminal peptide, and the activated complex generates free radicals that are responsible for the scission of the DNA chain.

Indications

Antibiotics, Antineoplastic; Antibiotics, Glycopeptide; Antimetabolites, Antineoplastic

  • For palliative treatment in the management of malignant neoplasm (trachea, bronchus, lung), squamous cell carcinoma, and lymphomas.
  • Bleomycin is a cytotoxic 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 that is used as an anticancer agent in the therapy of testicular and germ cell cancers, Hodgkin’s disease, lymphomas, and tumors of the head and neck.
  • Therapy with bleomycin in combination with other agents is often associated with mild-to-moderate serum enzyme elevations but is a rare cause of clinically apparent liver injury.
  • Bleomycin is indicated in the treatment of squamous cell carcinomas of the head and neck (including the mouth, tongue, tonsil, nasopharynx, oropharynx, sinus, palate, lip, buccal mucosa, gingiva, epiglottis, and larynx and paralarynx), cervix, penis, skin and vulva. It is also indicated for the treatment of testicular carcinoma (including embryonal cell carcinoma, choriocarcinoma, and teratocarcinoma), esophageal, and thyroid carcinomas.
  • Bleomycin is indicated for the treatment of Hodgkin’s and non-Hodgkin’s lymphomas.
  • Bleomycin is indicated in the treatment of AIDS-associated Kaposi’s sarcoma.
  • For more Therapeutic Uses (Complete) data for BLEOMYCIN (12 total),

Bleomycin sulfate is approved to be used alone or with other drugs as palliative treatment of:

  • Hodgkin lymphoma.
  • Non-Hodgkin lymphoma (NHL).
  • Squamous cell carcinoma of the penis.
  • Squamous cell carcinoma of the cervix.
  • Squamous cell carcinoma of the head and neck (SCCHN).
  • Squamous cell carcinoma of the vulva.
  • Testicular cancer.

Bleomycin sulfate is also approved to treat malignant pleural effusion and keep it from recurring (coming back).

Bleomycin sulfate is also being studied in the treatment of other types of cancer.

Contraindications

  • Bleomycin for Injection is contraindicated in patients who have demonstrated a hypersensitive or idiosyncratic reaction to it.
  • Bleomycin for Injection is contraindicated in patients who have demonstrated a hypersensitive or idiosyncratic reaction to it.

Dosage

Strengths: 15 units; 30 units; 15,000 intl units

Squamous Cell Carcinoma

  • 0.25 to 0.5 units/kg (10 to 20 units/m2) IV, IM, or subcutaneously 1 to 2 times a week

Non-Hodgkin’s Lymphoma

  • 0.25 to 0.5 units/kg (10 to 20 units/m2) IV, IM, or subcutaneously 1 to 2 times a week

Testicular Cancer

  • 0.25 to 0.5 units/kg (10 to 20 units/m2) IV, IM, or subcutaneously 1 to 2 times a week

Hodgkin’s Disease

  • 0.25 to 0.5 units/kg (10 to 20 units/m2) IV, IM, or subcutaneously 1 to 2 times a week; after a 50% response, a maintenance dose of 1 unit daily or 5 units weekly IV or IM should be given

Malignant Pleural Effusion

  • 60 units administered as a single bolus intrapleural injection

Side Effects

The Most Common

  • sudden chest pain, shortness of breath, dry cough, tiredness;
  • a light-headed feeling, feeling like you might pass out;
  • loss of appetite, weight loss;
  • sudden numbness or weakness on one side of the body, problems with vision or speech;
  • blisters or ulcers in your mouth, red or swollen gums, trouble swallowing;
  • unusual hardening of your skin; or
  • swelling, numbness, tingling or cold feeling in your fingers.

More Common

  • skin redness, dark streaks, or discoloration;
  • fingernail or toenail changes;
  • Darkening or thickening of skin
  • dark stripes on skin
  • itching of skin
  • skin rash or colored bumps on fingertips, elbows, or palms
  • skin redness or pain when an area is touched or pressed. সহজ বাংলা: চাপ দিলে ব্যথা।" data-rx-term="tenderness" data-rx-definition="Tenderness means pain when an area is touched or pressed. সহজ বাংলা: চাপ দিলে ব্যথা।">tenderness
  • swelling of fingers
  • vomiting and loss of appetite

Less common

  • Changes in fingernails or toenails
  • weight loss
  • Cough
  • shortness of breath
  • fever, chills, vomiting, not feeling well;
  • rash, itching; or
  • hair loss.

Drug Interactions

Pregnancy and Lactation

Pregnancy

Bleomycin is FDA pregnancy risk category D and can harm the fetus when given during pregnancy. Animal studies reveal abortifacient and/or teratogenic effects. Bleomycin should be given to pregnant women only when the benefit to the mother outweighs the risk to the fetus. Females of childbearing potential should be advised to avoid becoming pregnant while receiving bleomycin. If bleomycin is used during pregnancy or if a patient becomes pregnant while receiving bleomycin, the patient should be made aware of the potential harm to the fetus.

Breast-feeding

It is not known whether bleomycin is excreted into breast milk. Many drugs are excreted in human milk and because of the potential for serious adverse reactions in nursing infants from bleomycin, breastfeeding is not advised, and patients should be instructed to discontinue breastfeeding during bleomycin therapy.

References

Doctor visit helper

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A simple rural-patient checklist to help you explain symptoms clearly, ask better questions, and avoid unsafe self-treatment.

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.

Safe pathway to proper treatment

Care roadmap for: Bleomycin Sulfate – Uses, Dosage, Side Effects, Interactions

Use this simple roadmap to understand the next safe steps. It is educational and does not replace examination by a doctor.

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.
  1. Step 1

    Check danger signs first

    If danger signs are present, seek emergency care and do not wait for online information.

  2. Step 2

    Record the symptom story

    Write when symptoms started, severity, medicines already taken, allergies, pregnancy status, and test results.

  3. Step 3

    Visit a qualified clinician

    A doctor, nurse, or qualified healthcare provider can examine you and decide which tests or treatment are needed.

  4. Step 4

    Do only useful tests

    Do tests after clinical assessment. Avoid unnecessary tests, random antibiotics, or repeated medicines without diagnosis.

  5. 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.

RX Patient Help

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Write your symptom story. A health professional or site editor can review it before any answer is prepared. This box is not for emergency care.

Emergency first: Severe chest pain, breathing trouble, unconsciousness, stroke signs, severe injury, heavy bleeding, or rapidly worsening symptoms need urgent local medical care now.

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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