express delivery
Express delivery to
Select Pincode
Search for Medicine and Healthcare items

Longacillin 12iu Injection 1ml

1ml Injection
MRP 12.00
10.2015% OFF
Inclusive of all taxes
7 days return policyRead More
All the Products are packed and stored Safely

Longacillin 12iu Injection 1ml Description

Longacillin 12 iu injection is an antibiotic. Treating and managing several different types of bacterial infections like syphilis, rheumatic fever, yaws, etc., is the primary use of the Longacillin 1

2 iu injection. This injection is also used to treat upper respiratory tract diseases. This injection should never be given intravenously or into the vein, as it can cause serious side effects and even death. The main component of this medication is Benzathine penicillin. It belongs to the penicillin group of antibiotics. The mode of action of Longacillin 12 iu injections is to kill the bacteria and lower the infection and symptoms associated with the infection, such as fever, lethargy, etc. This medication is not effective against infections caused by cold, flu, viruses or fungi. Diarrhoea, stomach pain, headache, weakness, nausea, and vomiting are some of the common side effects of Longacillin 12 iu injection. Most of them do not require any medical attention. However, it is best to consult the doctor in case of persisting or worsening symptoms. People allergic to benzathine penicillin should inform their doctor. There are a few contraindications of Longacillin 12 iu injections. For instance, these injections can make birth control pills less effective.


Product Summary

Offer Price₹10.20
You Save₹1.80 (15% on MRP)
ContainsBenzathine Penicillin
UsesErysipelas, Primary and secondary syphilis, Latent syphilis (except for neurosyphilis), Yaws (affects the skin, bone and cartilage), Rheumatic fever, Rheumatic carditis (affect the heart, joints, brain, and skin), Poststreptococcal glomerulonephritis
Side effectsHeadache, Loose stools, Stomach discomfort, Joint pain, Vomiting, Skin rash
Check more medicines with composition as Benzathine Penicillin

Uses of Longacillin 12iu Injection 1ml

  • As per CDSCO and USFDA, Longacillin 12 iu injection is indicated
  • For the treatment of:
  • Erysipelas, a skin infection
  • Primary and secondary syphilis
  • Latent syphilis (except for neurosyphilis)
  • Yaws (affects the skin, bone and cartilage)
  • For the prophylaxis (prevention) of:
  • Rheumatic fever; to manage chorea (involuntary movements), rheumatic carditis (affect the heart, joints, brain, and skin)
  • Poststreptococcal glomerulonephritis, a rare kidney disorder that can develop after group A strep infections

Contraindications of Longacillin 12iu Injection 1ml

  • If you have a history of serious hypersensitivity to Benzatheine penicillin or other similar antibiotics (e.g., penicillins or cephalosporins). Allergies to this medicine are common. So, hypersensitiv...
    Read more
  • If you want to give this medicine intravenously or into the vein.
  • If you are using local numbing medicine, such as lidocaine, with this injection.
  • If you are using Longacillin injection in areas with low blood flow.
  • If you have a history of breathing disorders such as severe asthma. It increases the risk of an allergic reaction.
  • If you have severe kidney impairment; the dose should be checked, or it should not be given.
  • If you are at risk of encephalopathy.
  • If you are diagnosed with bacteria-associated diarrhoea. It has been reported with the use of nearly all antibiotics, including Longacillin 12 iu injection and may range in severity from mild diarrhoe...
    Read more
  • If you are not correctly diagnosed with a suspected bacterial infection. Using this medicine in such cases does not benefit the patient and increases the risk of developing treatment-resistant bacteri...
    Read more

Side effects of Longacillin 12iu Injection 1ml

  • Headache
  • Loose stools
  • Stomach discomfort
  • Joint pain
  • Nausea and vomiting
  • Skin rash

Precautions and Warnings of Longacillin 12iu Injection 1ml



Can I take the Longacillin 12 iu injection during pregnancy?
There is no evidence of harm to the foetus due to Longacillin 12 iu injections. There are, however, no adequate information and well-controlled studies of Longacillin 12 iu injections in pregnant women. These injections should be used during pregnancy only if needed. Please consult your doctor before using them.

Breast Feeding

Can I take the Longacillin 12 iu injection while breastfeeding?
Longacillin 12 iu injections are excreted in human milk. This medicine used by breastfeeding mothers may lead to the sensitisation of infants. Caution should be exercised when Longacillin 12 iu injections are given to a nursing woman. Please consult your doctor before using them.


Can I drive if I have taken the Longacillin 12 iu injection?
These injections can cause side effects such as allergic reactions, dizziness and convulsions. These can make you unfit to drive. Do not drive or operate machinery if you are feeling unwell.


Can I consume alcohol with the Longacillin 12 iu injection?
No, the safety of alcohol with Longacillin 12 iu injections is not established. It is better not to have alcohol with this injection.

Other General Warnings

Talk to your doctor if
  • You have a kidney or liver illness.
  • You have watery or bloody diarrhoea.
  • You have a skin rash, itching, redness, and other allergic reactions.
  • You have liver-related issues like jaundice (yellowing of skin and eyes), raised liver function test, etc.
  • You have a history of kidney stones.
  • You have a common cold or flu.
  • You are using this injection for a long time or more than once a week.
  • You notice any central nervous system effects like dizziness, confusion, altered levels of consciousness, epilepsy or movement abnormalities, etc.

Mode of Action of Longacillin 12iu Injection 1ml

How Does It Work?

Longacillin 12 iu injection contains Benzathine penicillin. It is similar to penicillin in its antibacterial action against susceptible bacteria. It works during the stage of active multiplication of ...
Read more

Directions for Use of Longacillin 12iu Injection 1ml

  • Longacillin injection is given to the patient in the hospital by the treating doctor or a nurse.
  • Do not take this injection by yourself.
  • Do not stop using this injection in the middle of the treatment.
  • This injection is given only into a muscle (IM) and never intravenously (IV)
  • It is injected into the buttocks or thigh.
  • A gap of a few days should be maintained between two doses or as your doctor prescribes.
  • Follow the instructions given by the doctor during the injection and for aftercare.
  • If you are having any breathing problems, rash, or swelling, inform your doctor immediately.
  • Try to take Longacillin 12 iu injection with food to prevent any stomach pain or discomfort.

Interactions of Longacillin 12iu Injection 1ml

Interactions with other medicines

  • It is not recommended to take Probenecid medication along with Longacillin 12 iu injections. Probenecid decreases the elimination of benzathine penicillin by the kidneys. It may result in increased an...
    Read more
  • Using Longacillin 12 iu injections while you are on oral anticoagulants or blood thinners like warfarin is not advised. They may cause prolongation of prothrombin time (test measures how long it takes...
    Read more
  • Using methotrexate and Longacillin 12 iu injections at the same time can reduce the excretion of methotrexate, which can increase its toxicity.
  • Intamax O injections lower the potency of oral contraceptive pills (combined estrogen and progesterone contraceptive pills). It is advised to use other modes of contraception.
  • Using other types of antibiotics such as Chloramphenicol, macrolides, sulfonamides, and tetracyclines may interfere with the antibacterial effects of Longacillin 12 iu injections.

Interactions with food items

  • There is no information available on the interaction of food with Longacillin 12 iu injection.

Storage and disposal of Longacillin 12iu Injection 1ml

Store Longacillin injection below 30 degrees celsius. Do not let the medicine freeze. Store it in the original container to keep them away from direct sunlight. Keep longacillin injection away from pe...
Read more

Dosage of Longacillin 12iu Injection 1ml


In a small number of patients, an overdose of Longacillin 12 iu injections can cause symptoms such as twitching and seizures, headache, fast heartbeats, shortness of breath, feeling tired or light-hea...
Read more

Missed a Dose

Longacillin injection is given at a hospital by the doctor or a nurse. If you forget to go to the hospital, take it as soon as you recall. Consult your doctor if you have any confusion regarding this....
Read more

Content Details


Dr. Vijay Y

MBBS, MD in Clinical Pharmacology

Frequently Asked Questions (FAQs)


Q: Can we use Longacillin 12 iu injections in children?

A: This injection is given to children and neonates of all ages to treat very serious types of infection. The dosing of Longacillin 12 iu injections should be modified according to the child's age.

Q: Can persons older than 65 years use Longacillin 12 iu injections?

A: Older adults over 65 respond differently from younger people. Please consult your doctor for the appropriate dose of Longacillin 12 iu medicine.

Q: Can I take Longacillin 12 iu injection if I have a kidney condition?

A: This medicine is well tolerated in kidney failure, but the risk of toxic reactions to Longacillin 12 iu injection may be greater in persons with impaired kidney function. Consult your doctor in such cases. The dose should be carefully monitored.
Last Updated on: 20 Apr 2022 | 09:46 AM (IST)
The information provided herein is supplied to the best of our abilities to make it accurate and reliable as it is published after a review by a team of professionals. This information is solely intended to provide a general overview on the product and must be used for informational purposes only. You should not use the information provided herein to diagnose, prevent, or cure a health problem. Nothing contained on this page is intended to create a doctor-patient relationship, replace or be a substitute for a registered medical practitioner's medical treatment/advice or consultation. The absence of any information or warning to any medicine shall not be considered and assumed as an implied assurance. We highly recommend that you consult your registered medical practitioner for all queries or doubts related to your medical condition. You hereby agree that you shall not make any health or medical-related decision based in whole or in part on anything contained in the Site. Please click here for detailed T&C.
Our Payment Partners