India is the world’s largest supplier of generic medicines, exporting over US$25 billion worth of pharmaceuticals annually to more than 200 countries. But with volume comes risk — not all manufacturers maintain the same quality standards. For international buyers, distributors, and procurement officers, knowing how to verify a manufacturer’s quality credentials is essential before committing to any purchase order.
This guide walks you through the practical checks and verifications that separate legitimate, high-quality Indian generic manufacturers from those that may cut corners.
Step 1: Verify CDSCO Manufacturing License
Every pharmaceutical manufacturer in India must hold a valid manufacturing license issued by the Central Drugs Standard Control Organization (CDSCO) or the respective State Drug Control Authority. This is the most fundamental check.
What to look for:
- Form 25 or Form 28 license certificate (under the Drugs & Cosmetics Act, 1940)
- License number clearly displayed on product packaging
- Manufacturing address matching the premises described in the license
- Product categories included in the license scope (tablets, capsules, injectables, etc.)
You can request a copy of the manufacturer’s license directly. Legitimate companies are transparent about their regulatory documentation. As of January 2026, CDSCO flagged 48 drugs as “Not Standard Quality” — most from smaller manufacturers with questionable compliance histories [Source: CDSCO Public Notices, January 2026]. This underscores why license verification is your first and most important line of defense.
Step 2: Check WHO-GMP Certification
World Health Organization Good Manufacturing Practices (WHO-GMP) certification is the international gold standard for pharmaceutical quality. While CDSCO licensing is mandatory for domestic production, WHO-GMP certification signals that the facility meets globally recognized manufacturing standards.
How to verify WHO-GMP:
- Request a copy of the manufacturer’s current WHO-GMP certificate
- Check the validity period — these certificates expire and must be renewed
- Verify the scope — the certificate should list the specific dosage forms the facility is approved to manufacture
- Cross-reference the manufacturing address with the CDSCO license
Note that WHO-GMP certification is typically issued by India’s National Accreditation Board for Testing and Calibration Laboratories (NABL)-approved auditors or by the State Drug Control Authority. Some manufacturers may also have EU GMP, US FDA, or PIC/S certification for specific facilities — these represent even higher compliance tiers.
Step 3: Inspect Product Documentation
A reliable manufacturer provides complete documentation for every product batch. These documents not only prove quality but are also essential for customs clearance in many importing countries.
Key documents to request:
- Certificate of Analysis (CoA) — Batch-specific testing results for identity, purity, potency, and contaminants
- Certificate of Pharmaceutical Product (CPP) — Issued by CDSCO, confirming the product is approved for sale in India
- Stability data — Accelerated and long-term stability study results
- Manufacturing Flow Chart — Process validation and quality checkpoints
- API source declaration — Information about where active pharmaceutical ingredients are sourced
If a manufacturer hesitates or refuses to share CoA documents for review before purchase, this is a strong indicator of poor quality control.
Step 4: Verify Track-and-Trace and QR Code Systems
India’s pharmaceutical regulatory environment is evolving. Under CDSCO’s track-and-trace initiative, manufacturers of exported pharmaceuticals are increasingly required to implement barcode or QR code systems for product tracing.
What to check:
- Does the product packaging include a scannable QR code or 2D barcode?
- Does the QR code link to batch-specific information (manufacturing date, expiry date, and batch number)?
- Does the manufacturer offer a mobile-based verification app or web portal?
- Scan the code on a sample product — does it return the expected data?
The presence of a functioning track-and-trace system is a strong marker of a manufacturer’s commitment to quality and counterfeit prevention.
Step 5: Evaluate Regulatory Compliance History
Before placing any large order, research the manufacturer’s track record with regulatory bodies:
- CDSCO enforcement actions: Check CDSCO’s public notices for warning letters, import alerts, or product recalls involving the manufacturer
- US FDA 483s: Manufacturers exporting to the US may have publicly available FDA inspection reports (Form 483) — search the FDA’s database
- Warning letters: Has the manufacturer received any regulatory warning letters in the past 3 years?
- Recalls: Search for product recalls associated with the manufacturer’s name or brands
Established manufacturers with multiple regulatory approvals (US FDA, EU GMP, WHO-GMP, PIC/S, TGA Australia) have undergone the most rigorous third-party inspections and typically maintain the highest quality standards.
Step 6: Order Small Samples First
No amount of documentation replaces physical inspection of the product itself. Always request samples before committing to bulk orders.
Sample evaluation checklist:
- Visual inspection: Packaging quality, print alignment, blister foil integrity, label accuracy
- Physical appearance: Consistent tablet size, color, and shape; no cracks, discoloration, or chipping
- Disintegration test: Place a tablet in warm water — it should disintegrate within 15-30 minutes (varies by formulation)
- Third-party lab testing: Send a sample to an accredited testing lab (e.g., SGS, Eurofins, Intertek) for independent verification of potency and purity
Third-party lab testing costs between US$200 and US$800 per product but is the most reliable way to confirm that the product meets labeled specifications for active ingredient content, dissolution rate, and impurity levels.
Step 7: Work with Verified Industry Associations
One of the most efficient ways to find reliable manufacturers is to work through established industry bodies that vet their members. The India Medicine and Supplement Dealers Association (IMSDA) maintains a member directory of verified pharmaceutical manufacturers and distributors who meet strict compliance criteria.
For a list of verified and reliable pharmaceutical distributors, refer to the IMSDA verified member directory.
Other reputable verification channels include:
- Pharmexcil (Pharmaceuticals Export Promotion Council of India) — registered exporters list
- CDSCO SUGAM portal — online licensing and tracking system for CDSCO-approved products
- WHO Prequalification Programme — list of manufacturers and products prequalified for UN procurement
Summary: Your Quality Verification Checklist
- CDSCO / State Drug Authority manufacturing license verified
- WHO-GMP certification confirmed (valid, in-scope)
- Certificate of Analysis obtained for recent batch
- QR code / track-and-trace system functional
- No adverse regulatory history (recalls, warnings, FDA 483s)
- Small sample ordered and physically inspected
- Independent third-party lab testing passed
- Manufacturer is an IMSDA member or Pharmexcil-registered
For more information, contact IMSDA at contact@indiamedicine.org.