Product Overview

Pyrazinamide 500 mg is a generic anti‑tuberculosis medication produced by Lupin Limited. Each strip contains ten tablets, each tablet delivering a precise 500 mg dose of pyrazinamide. The product is marketed in three pack configurations — 30 tablets, 60 tablets, and 90 tablets — to accommodate both short‑term prescriptions and longer maintenance regimens. All packs are sealed to preserve potency and are labeled with clear expiration dates, ensuring patients receive a medication that meets stringent quality standards.

What is Pyrazinamide 500 mg

Pyrazinamide 500 mg belongs to the pyridine‑carboxamide class of anti‑mycobacterial agents. Chemically, it is known as pyrazine‑2‑carboxamide and functions primarily as a bacteriostatic compound that interferes with the metabolic pathways of Mycobacterium tuberculosis. The drug is activated intracellularly in the liver to pyrazinoic acid, which accumulates in the acidic environment of granulomas, thereby targeting dormant bacilli that persist despite other antimicrobial activity. This unique mechanism positions pyrazinamide as a cornerstone of first‑line tuberculosis therapy, especially during the initial intensive phase of treatment.

Uses and Benefits

The primary therapeutic use of Pyrazinamide 500 mg is the treatment of active pulmonary and extrapulmonary tuberculosis when combined with isoniazid, rifampicin, and ethambutol. Its inclusion in the regimen accelerates the early bactericidal effect, allowing clinicians to achieve rapid reduction in bacterial load within the first two months. Patients experience a shorter overall treatment duration, which improves adherence and reduces the likelihood of incomplete therapy. Additionally, the generic formulation offers a cost‑effective solution, enhancing access to essential treatment in both high‑burden and low‑resource settings.

How It Works

Following oral administration, pyrazinamide is metabolized in the liver to pyrazinoic acid, a compound that disrupts fatty‑acid synthesis in Mycobacterium tuberculosis. The acidic environment of infected macrophages enhances the conversion and accumulation of the active metabolite, leading to growth arrest of both actively dividing and dormant bacilli. By impairing the bacterium’s ability to synthesize essential lipids, pyrazinamide weakens the pathogen’s protective cell envelope, making it more susceptible to the actions of other anti‑TB drugs. This synergistic effect shortens the time required to achieve sputum conversion and reduces the risk of developing drug‑resistant strains.

Dosage Guidelines

For most adult patients, the recommended initial dosage is one 500 mg tablet taken daily, typically alongside isoniazid, rifampicin, and ethambutol during the two‑month intensive phase. After this period, therapy may continue with a reduced regimen of isoniazid and rifampicin for an additional four months, totaling six to nine months of treatment depending on disease severity. Dosage adjustments are advised for individuals with hepatic impairment, advanced age, or concomitant hepatotoxic medications. Pediatric dosing is weight‑based, generally 10–15 mg per kilogram of body weight per day, not exceeding 500 mg. Patients with renal insufficiency should be monitored, as pyrazinamide is primarily cleared through hepatic metabolism rather than renal excretion.

Side Effects

Most patients tolerate Pyrazinamide 500 mg well, but some may experience adverse effects. Common gastrointestinal symptoms include nausea, vomiting, and loss of appetite, which are usually mild and transient. Dermatological reactions such as rash or itching can occur, and rare hypersensitivity responses may necessitate discontinuation. Hepatotoxicity remains the most serious concern; regular monitoring of liver enzymes through blood tests is recommended, especially during the first few weeks of therapy. Additional possible effects include gout flare‑ups due to elevated uric acid levels and, in very rare cases, neurologic symptoms such as peripheral neuropathy.

Warnings and Precautions

Pyrazinamide is contraindicated in individuals with a known hypersensitivity to the drug or any of its excipients. Caution is warranted for patients with pre‑existing liver disease, as well as for pregnant or breastfeeding women, unless the expected benefit justifies potential risks. Concomitant use of other hepatotoxic agents — such as certain anticonvulsants or chemotherapy drugs — requires careful evaluation of liver function. Baseline liver function tests should be obtained before initiating therapy, and periodic reassessments are essential throughout treatment. Patients should be instructed to complete the full prescribed course, even if symptoms improve, to prevent the emergence of drug‑resistant tuberculosis. If a dose is missed, the patient should resume the regular schedule without doubling the next dose.

Patient Support and Shipping Details

Lupin Limited ensures that all orders of Pyrazinamide 500 mg are processed with a focus on patient confidentiality and product integrity. Orders are typically dispatched within one business day, with standard delivery times ranging from six to fifteen days depending on the destination and selected pack size. Customers receive tracking information to monitor shipment progress, and the packaging is designed to protect tablets from moisture and physical damage. For patients who require assistance with insurance verification or medication counseling, a dedicated support line is available during business hours. Additional educational resources, including printable dosing calendars and side‑effect tracking sheets, can be downloaded from the company’s website.

Frequently Asked Questions

What is Pyrazinamide used for? Pyrazinamide 500 mg is indicated for the treatment of tuberculosis as part of a multi‑drug regimen, helping to reduce bacterial load in the lungs and other organs.

How should I store Pyrazinamide tablets? Keep the medication in its original packaging at room temperature, protected from moisture and heat, and store it where children cannot access it.

Can Pyrazinamide be taken with food? The drug can be taken with or without food; however, taking it with a full glass of water at the same time each day helps maintain consistent blood levels.

What are the most common side effects? Common side effects include nausea, vomiting, loss of appetite, skin rash, and elevated liver enzymes, which usually resolve with continued use or dose adjustment.

Is Pyrazinamide safe during pregnancy? Pregnant women should discuss the risks and benefits with their physician; the drug is generally considered only when the expected benefit justifies potential risk to the fetus.

For additional guidance on tuberculosis treatment protocols, refer to the Centers for Disease Control and Prevention (CDC) at CDC. Always discuss any changes in therapy with a qualified medical professional.

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