By Mitul Agarwal, B.Pharm, MBA. Published 2 October 2026.
Short answer: a CDMO (contract development and manufacturing organisation) develops and makes medicines for another company, from formulation work through to commercial batches. A CMO only manufactures to an existing process. This page brings together all of PharmaTradz's guides on choosing, verifying and working with contract manufacturers, so you can go straight to the one that answers your question.
The words people mix up
- CMO (contract manufacturing organisation): makes your product using a process and specifications you already have.
- CDMO: also develops it: formulation, scale-up, stability studies and the technical documents for registration.
- White label or private label: you sell the manufacturer's existing, registered product under your own brand. It's usually the fastest route, because development is already done.
- Loan licence (India) or toll manufacturing: you hold the product licence and the plant manufactures on your behalf.
- Tech transfer: moving a proven process from one site to another, often to a plant in the destination country to meet local-manufacturing rules.
Find the right guide
Contract manufacturing by dosage form
If you already know the dosage form, start with the page for it. Each one lists what to send for a quote and what to check in a manufacturer.
- Softgel capsules: soft gelatin capsules, gelatin, halal or plant-based shells.
- Tablets and effervescent tablets: coated, extended-release, chewable and effervescent.
- Hard capsules: powder and pellet fills, gelatin or HPMC shells.
- Oral liquids: syrups, suspensions, drops and dry syrups.
- Transdermal patches: matrix and reservoir patches.
- Contract packaging: blisters, bottles, cartons and serialisation.
- Nasal sprays: metered pumps, solutions and suspensions.
- Gummies: vitamin, mineral and herbal gummies.
- Sterile injectables: vials, ampoules and fill-finish.
- Lyophilisation: freeze-dried vials.
- Prefilled syringes: glass or plastic syringes.
- Ophthalmic products: eye drops, gels and ointments.
- Small batches: low minimum orders and pilot batches.
- API suppliers: generic APIs with the DMF, CEP and CoA checked.
Sourcing Indian medicines, by region and country
Many buyers outsource manufacturing to India. These guides explain how Indian-made medicines reach their market:
Country pages: Brazil, Mexico, Argentina, Chile, Colombia, Venezuela, Saudi Arabia, UAE, Egypt, South Africa, Nigeria, Kenya, Ghana, Indonesia, Philippines, Singapore, Thailand, Myanmar, Germany, United States, Russia.
Registration comes before manufacturing in most markets. Our import guides hub compares the fast-track routes for products approved abroad in 45 countries, and many governments now favour local manufacturing, which is where tech transfer and licensing come in.
Before you sign with any manufacturer
- Check the certificates yourself. Look up the site's GMP status with the issuing regulator, not just a PDF from the supplier. See how to verify a pharmaceutical supplier and which certifications actually matter.
- Match the approvals to your market. A WHO-GMP site may be fine for many emerging markets but not for the EU or US. The plant's inspection history matters more than its brochure.
- Ask what documents you will own. Who holds the dossier, the stability data and the API documents? Our guides to CTD vs ACTD and CEP, DMF and ASMF explain what to ask for.
- Put quality in writing. A quality agreement should say who releases batches, who handles complaints and recalls, and how changes are notified.
- Write a clear RFQ. Product, strength, pack, annual volume, destination and documents needed. Our RFQ checklist and template shows how.
Basics explained
New to the vocabulary of contract manufacturing and API sourcing? These short explainers cover the terms buyers ask about most: CRO vs CDMO vs CMO, what an API is, drug substance versus drug product, hydrochloride versus base and how to start a pharmaceutical import business.
For the documents buyers ask suppliers for, see what a DMF (Drug Master File) is, how to read a Certificate of Analysis, what a CoPP is and how importers use it, GMP vs cGMP and what a WHO-GMP certificate is and how to check one.
On products and formulation, see immediate, extended, delayed and controlled release, fixed-dose combinations (FDCs), what an excipient is, small molecules versus biologics and batch versus lot numbers.
For packaging and logistics, see what blister packaging is and how the pharmaceutical cold chain works; for every acronym in between, our pharma abbreviations A-Z.
Auditing a manufacturer? Start with the quality system: CAPA, ALCOA+ and data integrity, change control and deviations, OOS investigations, IQ, OQ, PQ and process validation, water for injection, ICH stability and climatic zones, batch manufacturing records and Good Distribution Practice.
Weighing suppliers in different countries? See API manufacturers in China vs India, the BIOSECURE Act and how China's NMPA works; for trials, comparator sourcing.
How PharmaTradz can help
- White-label manufacturing: registered products under your brand.
- Dossier licensing and registration: CTD, EU-CTD and ACTD dossiers for out-licensing.
- Documentation and quality pack: GMP, CoPP and CoA documents gathered before you commit.
- Manufacturers and CDMOs: list your capabilities and dossiers to reach buyers.
Tell us what you need made, and where it will be sold: send an RFQ. We usually reply within 48 hours with matched manufacturers and their document status.
Frequently Asked Questions(FAQs)
What is the difference between a CMO and a CDMO?
A CMO manufactures to your existing process. A CDMO also develops the product: formulation, scale-up, stability and registration documents.
Is white labelling the same as contract manufacturing?
Not quite. With white labelling you sell a product the manufacturer has already developed and registered, under your brand. With contract manufacturing the product is made to your specification, and you usually own the dossier.
How do I check that a manufacturer is really WHO-GMP certified?
Ask for the certificate, then confirm it with the authority that issued it, and ask for the latest inspection outcome. Our WHO-GMP verification guide walks through it.
Can a CDMO help me meet local-manufacturing rules?
Yes. Many markets now favour locally made products, so CDMOs increasingly offer tech transfer to a plant in your country, or supply bulk for local filling and packing.
