GMP contract manufacturing in Germany: what clients should know

For many pharmaceutical companies and supplement brands, outsourcing production to an external contract manufacturer is a strategic milestone. It also raises questions: How do you find the right partner? What should you look out for? And what does GMP compliance actually mean in practice?

In this article, we give an overview of the key aspects of GMP contract manufacturing in Germany – from the perspective of a manufacturer that has been producing pharmaceutical products for more than 125 years.

What does GMP mean in contract manufacturing?

GMP stands for Good Manufacturing Practice – an internationally recognized set of rules that ensures medicines and health products are consistently manufactured to defined quality standards.

In Germany, GMP requirements are set out in the German Medicines Act (AMG) and the Ordinance on the Manufacture of Medicinal Products and Active Substances (AMWHV). Dietary supplements are governed by the EU Food Information Regulation (LMIV) and related regulations – although many reputable contract manufacturers also produce supplements to GMP standards, even where this isn't legally required.

GMP is not a certificate you earn once and then simply have. It's a mindset that has to show in every process step – from receiving raw materials to releasing the batch.

What should clients look for in a contract manufacturer?

Choosing the right partner goes far beyond comparing prices. These are the factors that make the difference in practice:

1. Manufacturing authorization and certifications

Every contract manufacturer of medicines needs a manufacturing authorization under Section 13 AMG. It is issued by the competent state authority and regularly reviewed through inspections.

2. Experience with your product category

A manufacturer that has produced OTC pharmaceuticals for decades works differently from one that mainly makes cosmetics. Make sure your partner has proven experience with your specific product category – whether tablets, capsules, powders, homeopathic medicines or dietary supplements.

3. In-house production vs. brokering

Some providers on the market are brokers, not manufacturers. They take your order and pass production on to third parties. That means less control, longer communication paths and potential quality risks. Choose partners that produce in their own facilities.

Checklist: questions to ask a potential contract manufacturer

• Do you hold a valid manufacturing authorization under Section 13 AMG?
• Do you produce in your own facilities or through third parties?
• Which dosage forms do you cover?
• What is your minimum batch size?
• What does your documentation and release process look like?
• Do you offer formula development and scale-up?
• Who will be my contact throughout the partnership?

What does a typical contract manufacturing project look like?

The path from first inquiry to finished batch usually follows a proven pattern:

• Initial meeting & needs analysis – clarifying requirements: product type, dosage form, quantities, timeline and regulatory status.
• Formula development or transfer – either you bring a finished formula, or the manufacturer develops one for you. With private label, you choose from existing formulas.
• Samples & pilot batch – a development sample is produced for approval, checking appearance, taste, tableting properties and analytical values.
• Series production – GMP-compliant manufacturing with complete batch documentation, in-process controls and quality testing.
• Packaging & release – filling, packaging and labeling to your specifications, followed by batch release by the Qualified Person.

Why documentation matters

In pharmaceutical production, the rule is simple: if it isn't documented, it didn't happen. For clients, this means your contract manufacturer must be able to provide complete records for every batch – from raw material testing and manufacturing parameters to the certificate of analysis.

At Valphira, you receive a complete batch record for every batch, certificates of analysis for raw materials and finished goods, and stability data on request. This transparency is not only a regulatory necessity – it's also the foundation of trust in a long-term partnership.

Conclusion: a partnership, not just a service

The best contract manufacturing relationships are more than client–supplier arrangements. They are partnerships in which both sides benefit. The manufacturer contributes production expertise, quality assurance and regulatory know-how; the client brings market knowledge, brand understanding and sales strength.

When both sides work together as equals, the result is products that win over the market – and a partnership that lasts for years.