pentas 200 tablet - Penicillin G (200000IU) medicine

Bistrepen Forte 200000IU Injection: Complete Medicine Guide

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🏭 Intas Pharmaceuticals Ltd 📦 Varies by brand 💊 Allopathy 📅 Updated: Sep 25, 2026
⚠️ Nephrotoxicity Risk 📋 Prescription Required 💊 Generic Available
Medically Reviewed
11 min read
Evidence: Well-established
Reviewed by
SaathiMed Expert Panel | Sep 25, 2026

When to Call Your Doctor IMMEDIATELY

  • Difficulty breathing or wheezing
  • Swelling of face, lips, or throat
  • Severe diarrhea or abdominal pain
  • Seizures
  • Decreased urine output
  • Yellowing of skin or eyes

If experiencing severe symptoms, call emergency services immediately.

What is pentas 200 tablet used for?

This medicine is a penicillin antibiotic injection used to treat bacterial infections such as strep throat, syphilis, and rheumatic fever. It works by killing bacteria.

  • Generic Name: Penicillin G (200000IU)
  • Manufacturer: Intas Pharmaceuticals Ltd
  • Form: Allopathy
  • Pregnancy Category: Consult doctor
  • Prescription Required: Yes

🇮🇳 pentas 200 tablet के बारे में (Hindi Summary)

उपयोग: यह दवा पेनिसिलिन जी का इंजेक्शन है, जिसका उपयोग बैक्टीरियल संक्रमणों जैसे स्ट्रेप थ्रोट, सिफलिस, और रूमेटिक फीवर के इलाज के लिए किया जाता है। यह बैक्टीरिया को मारकर काम करती है।

साइड इफेक्ट्स: आम दुष्प्रभावों में इंजेक्शन स्थल पर दर्द, मतली, दस्त, और त्वचा पर चकत्ते शामिल हैं। गंभीर दुष्प्रभावों में एनाफिलेक्सिस, दस्त, और दौरे शामिल हो सकते हैं।

सुरक्षा सलाह: इस दवा को लेने से पहले अपने डॉक्टर को अपनी एलर्जी और अन्य दवाओं के बारे में बताएं। गर्भावस्था और स्तनपान के दौरान डॉक्टर से सलाह लें।

💡 Did You Know? India has the highest number of USFDA-compliant plants outside the USA.

💊 pentas 200 tablet Uses & Benefits

[{"condition":"Streptococcal infections","description":"Used to treat infections caused by Streptococcus pyogenes, such as pharyngitis, scarlet fever, and skin infections.","evidence":"Well-established"},{"condition":"Syphilis","description":"Effective against Treponema pallidum, the bacterium that causes syphilis, in all stages.","evidence":"Well-established"},{"condition":"Rheumatic fever prophylaxis","description":"Used to prevent recurrence of rheumatic fever in patients with a history of the disease.","evidence":"Well-established"},{"condition":"Endocarditis prophylaxis","description":"Administered before certain dental or surgical procedures in patients at high risk of infective endocarditis.","evidence":"Well-established"},{"condition":"Anthrax","description":"Used in the treatment of anthrax, especially in cases of bioterrorism-related exposure.","evidence":"Well-established"},{"condition":"Clostridial infections","description":"Effective against Clostridium species, including gas gangrene and tetanus, in combination with other treatments.","evidence":"Well-established"}]

Off-label uses: [{"condition":"Lyme disease","description":"Sometimes used off-label for early Lyme disease, though other antibiotics are preferred.","evidence":"Limited"},{"condition":"Leptospirosis","description":"May be used off-label for leptospirosis, but evidence is limited.","evidence":"Limited"}]

Primary treatment for: Bacterial infections

Also treats: Streptococcal pharyngitis, Syphilis, Rheumatic fever, Endocarditis

📋 Drug Information

Generic Name(s)Penicillin G (200000IU)
Brand Namepentas 200 tablet
ManufacturerIntas Pharmaceuticals Ltd
Packaging / FormVaries by brand (Allopathy)
Therapeutic ClassANTI INFECTIVES
Action ClassCell wall active agent - Narrow spectrum Penicillin
Route of AdministrationParenteral (intramuscular or intravenous)
StorageStore below 25°C, protected from light. Do not freeze. Reconstituted solutions should be used immediately or stored as directed by the manufacturer.
Shelf LifeTypically 24 to 36 months from the date of manufacture, depending on the product. Refer to the package insert.
WHO GuidelinePenicillin G is included in the WHO Model List of Essential Medicines for the treatment of various bacterial infections.
ICMR GuidelineICMR guidelines recommend penicillin G for the treatment of streptococcal infections and syphilis.

👨‍⚕️ Doctor's Practical Tips

Evidence-based practical advice from experienced clinicians

1
Always administer this medicine in a healthcare setting where resuscitation equipment is available.
2
Ask about penicillin allergy before administering.
3
Monitor for signs of anaphylaxis for at least 30 minutes after injection.
4
Adjust dose in renal impairment.
5
Advise patients to complete the full course as prescribed.

🔍 Is This Medicine Right for Your Symptom?

Educational reference. Always consult a doctor for diagnosis.

✅
Sore throat with fever
This medicine is commonly prescribed for streptococcal pharyngitis.
Likely Use
❌
Skin rash
This medicine is not used for viral rashes.
Not Primary

🔬 How This Medicine Works (Pharmacology)

Pharmacokinetics

AbsorptionThis medicine is administered parenterally and is rapidly absorbed from the injection site. Peak serum concentrations are achieved within 15 to 30 minutes after intramuscular injection.
DistributionThis medicine distributes widely into body tissues and fluids, including the lungs, liver, kidneys, and synovial fluid. It crosses the placenta and is excreted in breast milk. It does not penetrate the cerebrospinal fluid well unless the meninges are inflamed.
Protein BindingApproximately 60% bound to plasma proteins.
MetabolismThis medicine is partially metabolized in the liver to inactive metabolites.
Half-LifeThe elimination half-life is approximately 30 minutes in patients with normal renal function.
ExcretionThis medicine is primarily excreted unchanged in the urine via tubular secretion and glomerular filtration.
BioavailabilityNot applicable for parenteral administration; bioavailability is 100% when given intravenously.
Onset of ActionThe onset of action is rapid, typically within 15 to 30 minutes after intramuscular injection.
Peak Plasma TimePeak plasma concentrations occur within 15 to 30 minutes after intramuscular administration.
Duration of ActionThe duration of action is approximately 4 to 6 hours, depending on the dose and route.

How It Works

This medicine works by binding to penicillin-binding proteins (PBPs) located inside the bacterial cell wall. This binding inhibits the transpeptidation reaction that cross-links peptidoglycan chains, which are essential for cell wall integrity. As a result, the bacterial cell wall becomes weakened, leading to cell lysis and death, especially in actively dividing bacteria. This medicine is bactericidal against susceptible organisms.

Mechanism Steps

1
Binding to penicillin-binding proteins: This medicine binds to specific penicillin-binding proteins (PBPs) on the bacterial cell membrane.
2
Inhibition of cell wall synthesis: This binding inhibits the transpeptidase enzyme, preventing the cross-linking of peptidoglycan chains.
3
Activation of autolysins: The disruption of the cell wall triggers autolytic enzymes that further degrade the cell wall.
4
Bacterial cell lysis: The weakened cell wall leads to osmotic lysis and death of the bacterium.

💡 How to Take pentas 200 tablet

Strength: 200,000 IU per vial or pre-filled syringe for injection.

1This medicine must be administered by a healthcare professional.
2It is given as an intramuscular or intravenous injection.
3The injection site should be rotated to prevent pain and tissue damage.
4Do not self-administer.
5Follow the prescribed dosing schedule exactly.

Dosage Information

Adult DosageThe dose of this medicine varies depending on the type and severity of infection, ranging from 1 million to 24 million IU per day, divided into multiple doses. For example, for streptococcal pharyngitis, a single intramuscular dose of 1.2 million IU may be used. For serious infections, higher doses are given intravenously. Dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function.
Pediatric DosagePediatric dosing is not established from available information. Consult a pediatrician.
Elderly DosageElderly patients may have reduced renal function and may require dose adjustment. Monitor renal function closely.
Renal ImpairmentIn patients with renal impairment, the dose should be adjusted based on creatinine clearance. For severe renal impairment, the dose may need to be reduced or the interval extended.
Hepatic ImpairmentNo specific dosage adjustment is required for hepatic impairment, but monitor liver function.
Maximum Daily DoseThe maximum daily dose is not fixed and depends on the infection being treated. Doses up to 24 million IU per day have been used in severe infections.

Dosage Timeline

🌅 Morning ❌ ☀️ Afternoon ❌ 🌆 Evening ❌ 🌙 Night ❌

⏰ What to Do If You Miss a Dose

📌 Less than half the dosing interval has passed
→ Take the missed dose as soon as you remember.
💡 Continue with the regular schedule.
📌 More than half the dosing interval has passed
→ Skip the missed dose.
💡 Do not double dose to catch up.

⚠️ Side Effects of pentas 200 tablet

✅ Common Side Effects

Injection site pain (Common (5-10%))
Apply a cold compress to the site. Consult doctor if pain persists.
Nausea (Common (5-10%))
Take with food if possible. Consult doctor if persistent.
Diarrhea (Common (5-10%))
Stay hydrated. Consult doctor if severe or bloody.
Skin rash (Common (5-10%))
Report to doctor. May indicate allergy.

🚨 Serious Side Effects

Anaphylaxis (Rare (<0.1%))
Seek immediate medical attention if you experience difficulty breathing, swelling of face or throat, or a sudden drop in blood pressure.
Clostridioides difficile-associated diarrhea (Rare (<0.1%))
Seek medical attention if you develop severe watery diarrhea, abdominal pain, or fever.
Seizures (Rare (<0.1%))
Seek immediate medical attention if seizures occur, especially in patients with kidney disease.
Hemolytic anemia (Rare (<0.1%))
Report unusual fatigue, pale skin, or jaundice to your doctor.

⚠️ Rare Side Effects

Interstitial nephritis
Seek medical attention if you experience decreased urine output, swelling, or blood in urine.
Serum sickness
Report fever, joint pain, and rash to your doctor.

Consult your doctor if you experience any unusual symptoms.

🔬 Drug Interactions

Drug Severity Effect
Warfarin Major
Methotrexate Major
Probenecid Major
Oral contraceptives Moderate
Aminoglycosides Moderate
Tetracyclines Minor

🚨 Major Interactions

  • Warfarin
  • Methotrexate
  • Probenecid

⚡ Moderate Interactions

  • Oral contraceptives
  • Aminoglycosides

🍷 Alcohol Interaction

Alcohol may increase the risk of gastrointestinal side effects and should be avoided during treatment.

🔎 Check Your Other Medicines

Educational tool. Always confirm with your doctor or pharmacist.

🛡️ Safety & Warnings

🚫 Contraindications

["Hypersensitivity to penicillins or cephalosporins","History of severe allergic reaction to any beta-lactam antibiotic"]

⚠️ Warnings & Precautions

["Use with caution in patients with a history of allergy, asthma, or kidney disease.","May cause false-positive results in certain urine glucose tests.","Prolonged use may lead to superinfection with resistant organisms.","Ensure adequate hydration during treatment.","Do not use for viral infections."]

🤱 Lactation Safety

This medicine is excreted in breast milk in low concentrations and is generally considered safe during breastfeeding. Monitor the infant for diarrhea or thrush.

💊 Overdose Management

Overdose may cause neuromuscular hyperexcitability, seizures, and electrolyte imbalances. Treatment is supportive and symptomatic. Hemodialysis may be considered in severe cases with renal failure.

⏰ Missed Dose

If you miss a dose, contact your healthcare provider as soon as possible. Do not double the dose to catch up. The dosing schedule should be strictly followed as prescribed.

Additional Safety Advice

General Safety

Before receiving this medicine, inform your doctor about any allergies, especially to penicillins or cephalosporins, and about any other medications you are taking, including blood thinners, methotrexate, and oral contraceptives. This medicine may reduce the effectiveness of oral contraceptives, so additional contraceptive measures may be needed during treatment. It can also interact with probenecid, which may increase the levels of this medicine in the blood. If you have kidney disease, your doctor may need to adjust the dose. Do not use this medicine without a prescription, and do not self-administer injections. Always ensure that the injection is given by a trained healthcare professional. If you experience any signs of an allergic reaction, such as rash, itching, or swelling, seek medical help immediately.

👴 Special Considerations for Elderly

💡 For Patients Above 65

Elderly patients may have reduced renal function and require dose adjustment. Monitor for signs of toxicity.

🤰 Pregnancy Planning (TTC)

If you are planning pregnancy, consult your doctor before starting this medicine. It is generally safe but should be used only when clearly needed.

🏥 Post-Surgery Considerations

This medicine may be used perioperatively to prevent surgical site infections. Inform your surgeon if you are allergic to penicillin.

🦷 Dental Procedures

This medicine may be prescribed before dental procedures in patients at risk of endocarditis. Inform your dentist if you are allergic to penicillin.

💚 Lifestyle Tips for Better Results

🏃
Complete the full course of antibiotics as prescribed.
🥗
Maintain good hygiene to prevent infection spread.
😴
Stay hydrated.
💧
Get adequate rest.
🧘
Eat a balanced diet to support recovery.

🏋️ Exercise Considerations

Avoid strenuous exercise immediately after injection if you experience pain or swelling at the injection site.

🥗 Diet Recommendations

Stay well hydrated
Include probiotics if diarrhea occurs
Avoid alcohol

💼 Impact on Daily Work & Life

This medicine may cause dizziness or fatigue in some patients. Avoid driving or operating machinery if you feel unwell.

🛑 When to Stop This Medicine

Do not stop this medicine without consulting your doctor. Complete the full course as prescribed to prevent recurrence and resistance.

📅 Long-Term Use Effects

Long-term use of this medicine may lead to superinfection with resistant bacteria or fungi. Prolonged therapy requires monitoring of renal and hepatic function, as well as blood counts.

🌿 Non-Medicine Approaches

These can complement medicine but do not replace prescribed treatment.

Oral antibiotics

For mild infections, oral antibiotics like amoxicillin may be used.

Evidence: Well-established

💉 Vaccination Considerations

💉 If You're Getting Vaccinated

No specific interactions with vaccines are known. However, consult your doctor before receiving any vaccine while on this medicine.

📦 Storage Guide

✅ DO

Store at room temperature (15-30°C)

❌ DON'T

Do not refrigerate unless specified

✅ DO

Keep in original container

❌ DON'T

Do not transfer to unmarked containers

✅ DO

Keep away from direct sunlight

❌ DON'T

Do not store in bathroom cabinet

✈️ Traveling with This Medicine

Carry this medicine in its original packaging with a copy of your prescription. Store it at room temperature, away from direct sunlight. If traveling across time zones, consult your doctor about adjusting the dosing schedule. Declare it to customs if required.

💰 Cost Analysis & Savings

👥 Real Patient Stories

Educational, anonymized scenarios. Individual results may vary.

👤 A 35-year-old man with strep throat
He received this medicine as an intramuscular injection. His symptoms improved within 48 hours. He was advised to complete the course.
💡 Lesson: Penicillin G is effective for strep throat when administered properly.
👤 A 28-year-old pregnant woman with syphilis
She was treated with this medicine to prevent transmission to her baby. She tolerated the injection well and delivered a healthy baby.
💡 Lesson: Penicillin G is the treatment of choice for syphilis in pregnancy.

💬 Questions Patients Often Ask

Q: How long does it take to work?

A: This medicine starts working within 15-30 minutes after injection, but improvement in symptoms may take 24-48 hours.

Q: Is this medicine safe during pregnancy?

A: Yes, penicillin G is considered safe during pregnancy when clinically indicated.

🤔 Common Patient Concerns

💭 These are the concerns patients most commonly raise

  • Can I take this medicine if I am allergic to penicillin?
  • How long does the injection last?
  • Can I drive after receiving this injection?
  • Does it interact with my other medications?
  • What if I miss a dose?
  • Can I drink alcohol while on this medicine?

🔄 Substitutes for pentas 200 tablet

View All

Alternative brands with exact same active ingredient:

Medical Note: Always consult your doctor before switching medications.

🛑 Myths vs. Facts

  • Myth: This medicine can cure viral infections.
    Fact: This medicine is only effective against bacterial infections.
  • Myth: This medicine is safe for everyone.
    Fact: It can cause allergic reactions and is contraindicated in those with penicillin allergy.

🔄 Alternative Options

Generic Alternatives

  • Penicillin G sodium
  • Penicillin G potassium

Brand Alternatives

  • Bistrepen Forte 200000IU Injection

📊 Comparison with Similar Medicines

[{"medicine":"Penicillin G","class":"Natural penicillin","route":"Parenteral","spectrum":"Gram-positive"},{"medicine":"Amoxicillin","class":"Aminopenicillin","route":"Oral","spectrum":"Broad-spectrum"}]

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