Third-Party Tablet Manufacturing: End-to-End Process, Packaging Selection & Schedule M Documentation

Overview of Solid Oral Dosage Manufacturing

Pharmaceutical tablets represent over 55% of all commercial drug prescriptions dispensed in India. Their popularity stems from precise unit dosing, superior physical-chemical stability, patient convenience, and cost-effective high-speed production. For healthcare brand owners entering contract manufacturing, understanding the technical stages of tablet fabrication is crucial to ensuring flawless batch quality and competitive unit costing.

The 6 Core Steps of Tablet Manufacturing

1. Raw Material Dispensing: APIs and pharmaceutical excipients (microcrystalline cellulose, lactose, disintegrants, lubricants) are weighed under positive-pressure Laminar Air Flow (LAF) hoods with calibrated electronic balances.
2. Sifting & Granulation: Granules are engineered through Rapid Mixer Granulators (RMG) or Fluidized Bed Processors (FBP) to ensure uniform flowability and bulk density.
3. Rotary Compression: Tooling dies compress the granulated blend into uniform tablets under controlled compression forces (up to 100 kN).
4. Tablet Coating: Automatic perforated coating pans apply aqueous film, enteric, or polymer coatings to mask taste, provide gastric acid resistance, or delay release.
5. Primary Packaging: Continuous blister packaging lines seal tablets into ALU-ALU or PVC/PVDC foils under strict relative humidity controls.
6. Secondary Packaging & QA Clearance: Inspection, cartooning, leafleting, outer shipper packing, and Certificate of Analysis (COA) generation.

Granulation Technologies: Wet vs Dry vs Direct

Selecting the optimal granulation methodology depends directly on the API's moisture sensitivity and flow characteristics:

High-Speed Rotary Compression & In-Process QC

During the compression run, in-process quality control (IPQC) inspectors perform automated testing every 30 minutes to verify compliance with pharmacopoeial standards (IP/BP/USP):

• Weight Variation: +/- 5% or 7.5% depending on tablet target weight.
• Hardness Testing: Measured in kp (kilopond) or N (Newtons) to ensure physical resistance to transit fragmentation while guaranteeing gastrointestinal breakdown.
• Friability Test: Must show less than 1.0% weight loss after 100 rotations in a Roche Friabilator.
• Disintegration Time (DT): Uncoated tablets must disintegrate within 15 minutes; film coated within 30 minutes; mouth-dissolving within 60 seconds.

Coating Formulations: Film, Enteric & Sustained Release

State-of-the-art perforated coating pans ensure uniform polymer application without orange-peel, capping, or logo-bridging defects:

• Aqueous Film Coating (HPMC/Colorcon): Provides crisp color identification, swallowability, and basic moisture protection without environmental solvent emissions.
• Enteric Coating (Methacrylic Acid Copolymers / Eudragit): Resists acidic gastric juice in the stomach (pH 1.2) to release API exclusively in the alkaline small intestine (pH > 6.8)—vital for PPIs like Pantoprazole and Rabeprazole.
• Sustained & Controlled Release Polymers: Delivers zero-order or extended drug release over 12 to 24 hours (e.g., Metformin SR, Telmisartan).

Packaging Options: ALU-ALU vs PVC/PVDC vs Strip

Mandatory Schedule M Batch Documentation

Every commercial production batch released from our partner plants is accompanied by an airtight technical documentation package:

• BMR (Batch Manufacturing Record): Complete chronological log of dispensing, blending, compression, and coating parameters signed by manufacturing chemists.
• BPR (Batch Packaging Record): Detailed accounting of printed foil consumption, carton reconciliation, and sample retention.
• Finished Product COA: Complete chemical analysis detailing assay percentage, related substances/impurities, dissolution profiles, and microbial bio-burden counts.