Zanocin belongs to a class of drugs called quinolone antibiotics used to treat a wide range of bacterial infections. Zanocin works by killing the bacteria which are the cause of the infection. Get to know how Zanocin works, its side effects, precautions, and contraindications where Zanocin is not suggested.

Read about similar medications

About Zanocin

This antibiotic treats only bacterial infections. It will not work for viral infections such as flu & common cold. It is useful for treating infections such as urine infections, chest infections, skin and soft tissue infections, and some sexually transmitted infections.

Active ingredients

This medicine is manufactured by Sun Pharmaceutical Industries Ltd. The key ingredient in this medicine is Ofloxacin 200mg.

How does Zanocin work?

Zanocin belongs to a class of medications called quinolone antibiotics. A class of drugs is a group of medications that work in a similar way. These medicines are often used to treat similar conditions.

Zanocin works by killing the bacteria that are causing an infection by inhibiting the DNA replication. You should only use this medication to treat bacterial infections.

Zanocin Uses and benefits

Zanocin is used to treat bacterial infections in adults and also to control prevention, & improvement of the following diseases, conditions, and symptoms:


Zanocin is used in the treatment of community-acquired pneumonia which is a most common type of lung infection caused by Haemophilus influenzae and Streptococcus pneumoniae.


Zanocin used in the treatment of Nongonococcal urethritis which is an inflammation of urethra caused by E.coli, Pseudomonas aeruginosa, and Klebsiella.


Zanocin used in the treatment of bronchitis which is an inflammation of lungs caused by

  • Haemophilus influenzae
  • Streptococcus pneumoniae
  • Mycoplasma pneumoniae

Traveler’s Diarrhea

Zanocin used in the treatment of Traveler’s Diarrhea which is caused by Enterotoxigenic Escherichia coli bacteria.


Zanocin is used in the treatment of cystitis which is a bladder infection caused by

  • Pseudomonas aeruginosa
  • Enterococci E.coli
  • Klebsiella pneumoniae

Salmonella Enteric Fever

Used to treat salmonella enteric fever which is caused by Salmonella typhi.


Used in the treatment of Pyelonephritis which is a type of kidney infection caused by

  • Coli
  • Pseudomonas aeruginosa
  • Klebsiella pneumoniae
  • Enterococci

Skin and Structure Infection

Used in the treatment of Skin and Structure infection like cellulitis, wound infection and cutaneous abscess caused by

  • Staphylococcus aureus
  • Streptococcus pyogenes

Infections of urethra and cervix

Used to treat mixed Infections of the urethra and cervix which are caused by

  • Neisseria gonorrhoeae
  • Chlamydia trachomatis


Used in the treat Shigellosis which is caused by bacteria called Shigella.

Zanocin side effects

This medicine may cause few rare side effects along with its intended uses. If you suffer any of such side effects, it is advised to consult your doctor immediately.

Please inform your physician if you notice any adverse reaction to the medication.  Check with your physician immediately if any of the following side effects occur while taking Zanocin:

  • Upset stomach
  • Nausea
  • Diarrhea
  • Headache
  • Dizziness
  • Light-headedness or trouble sleeping

If any of these effects persist or worsen, tell your physician promptly. Remember that your physician has prescribed this drug because he or she has judged that the benefit to you is greater than the risk of side effects.

Tell your physician right away if you have any serious side effects, including:

  • Signs of a new infection (such as fever, persistent sore throat)
  • Signs of kidney problems such as change in the amount of urine
  • Easy bruising and bleeding
  • Signs of liver problems such as unusual tiredness, stomach pain, persistent vomiting and nausea, yellowing eyes or skin, dark urine

Contraindications for Zanocin

This medicine is contraindicated in following conditions:


This drug is not recommended for use if you have a known allergy to Zanocin or any other quinolones.

Myasthenia gravis

This is not recommended for use if you have a past history of myasthenia gravis or family history of myasthenia gravis (weakness and rapid tiring of muscles which are under voluntary control).

Tendon rupture or Tendinitis

This drug is not recommended for use if you have a past history of tendinitis or tendon rupture after using Zanocin or any other quinolones.

Precautions while taking Zanocin

  • Never take antibiotic medicines for a viral infection like a cold or the flu.
  • Always take the complete course of treatment, as advised by your physician even if you feel better.
  • If you notice any side effects; stop taking Zanocin immediately and consult your physician.
  • Inform your doctor if you are pregnant or planning to conceive or breastfeeding.
  • Inform your doctor if you have ever been diagnosed with kidney, epilepsy or heart diseases.
  • Before taking Zanocin, tell your physician if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your physician for more information.
  • Before using this medicine, let your doctor know about your medical history, especially if you suffer any severe kidney problems or have a history of tendon problems like rheumatoid arthritis, or have received an organ transplant (example; kidney, heart, or lung).
  • Before having this medicine, tell your physician about all the products you use (including herbal products, prescription drugs, and non-prescription drugs).
  • This medicine is recommended to use in pregnant women only if strongly needed. Consult your doctor for proper advice if you are in pregnancy.
  • It is unknown if Zanocin passes into breast milk. Discuss the risks and benefits with your physician before breastfeeding.

Zanocin dosage

Zanocin should be taken exactly as directed by your physician. The usual dosage is described below:

You should take your Zanocin tablets swallowed whole with a glass of water and with food, take this medicine depending on your condition and your physician’s recommendation.  You should avoid taking Zanocin while drinking alcohol, as you may experience some unpleasant effects, including vomiting, nausea, stomach cramps, headache, and fast heartbeat.  You should complete the course of Zanocin, which is usually for 6-10 days, even if you are feeling better or the infection may not clear up completely.

Zanocin – Drug Interactions

If you use other over the counter products or other drugs at the same time, the effects of the Zanocin Tablet may change. This may increase your risk for side-effects or cause your drug not to work properly. Tell your physician about all the drugs, vitamins, and herbal supplements you are using, so that your physician can help you prevent or manage drug interactions. Zanocin Tablet may interact with the following medicines and products:

  • Antacids
  • Sucralfate
  • Metal Cations
  • Multivitamins
  • Caffeine
  • Cimetidine
  • Cyclosporine
  • Drugs metabolized by Cytochrome P450 enzymes
  • Non-steroidal anti-inflammatory drugs
  • Theophylline
  • Warfarin
  • Antidiabetic Agents (e.g., insulin, glyburide/glibenclamide)
  • Alcohol

Substitutes for Zanocin

Below is the list of medicines, which have the same composition, strength, and form as Zanocin and hence can be used as its substitute:

  • Floxin (Rx)
  • CiprZanocin (Rx)
  • Metronidazole (Rx)
  • LevZanocin (Rx)
  • Cipro (Rx)
  • Azithromycin (Rx)
  • Doxycycline (Rx)
  • Amoxicillin (Rx)
  • Levaquin (Rx)

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