Reliable supply of active pharmaceutical ingredients
Siegfried ensures reliable access to high-quality APIs through a secure supply chain, regulatory expertise, and a global distribution network serving more than 70 countries. Our customers benefit from world-class technical and regulatory support backed by our expertise in API development and manufacturing.
Your trusted partner for generic APIs
Our API catalog
Addiction treatment and abuse prevention
Siegfried is a trusted partner for high-quality APIs used in addiction treatment and abuse prevention, including Naloxone, Naltrexone, Methadone and Buprenorphine, among others.
Security of supply with world-scale manufacturing
Siegfried operates a globally leading in-house manufacturing platform for Naloxone salt APIs, complemented by a leading position in Buprenorphine manufacturing. This integrated manufacturing network helps ensure security of supply and reliable delivery to highly regulated markets. Through our subsidiary, Extractas Biosciences, Siegfried also produces key alkaloid-based starting materials, including Oripavine and Thebaine, strengthening control over the supply chain.
Global registrations and regulatory expertise
The Nal-family of APIs is registered in all major regulatory regions worldwide, including Brazil, South Korea and China. Combined with extensive regulatory expertise, Siegfried supports customers in navigating global registration requirements and maintaining compliance throughout the product lifecycle.
A broad and specialized portfolio
Siegfried offers a comprehensive portfolio of Naloxone salt APIs alongside extensive expertise in complex, tightly regulated APIs, including Buprenorphine and Methadone.
Explore our addiction treatment and abuse prevention portfolio
ADHD
At Siegfried, we empower our customers with strategic partnerships across the entire ADHD technology landscape. Leveraging our renowned expertise in controlled substances and a legacy of consistent supply, Siegfried delivers a comprehensive range of high-quality ADHD APIs, including Methylphenidate HCl, Dexmethylphenidate, and the Amphetamine salts. Our commitment to innovation and reliability ensures that you receive products tailored to your needs, backed by over 150 years of experience.
Reliable supply from small-scale to multi-metric ton volumes
We support demand from small-scale development through multi-metric ton commercial production, with a flexible supply model designed for both early-stage programs and established products. Our manufacturing capacity enables us to meet growing demand as your product advances.
Dual‑region manufacturing across Europe and the US
Siegfried manufactures controlled-substance APIs in both the United States and Europe, offering regional supply options aligned with customer and market needs. Our proven long-term execution model, combined with backward integration for selected APIs in our ADHD portfolio, helps support continuity of supply even in quota-constrained environments.
Custom particle size options based on customer requirements
We offer flexible particle size options that can be aligned with specific product requirements, supporting customers with different formulation and manufacturing process needs.
Anesthetics
Siegfried is a long-standing partner in anesthetic APIs, supporting customers with established products across a wide range of markets. Our portfolio is built on decades of experience in local anesthetics and supported by industrial, regulatory and supply capabilities needed for long-term commercial support.
Broad portfolio of local anesthetic APIs across key applications
Siegfried offers a broad portfolio of generic anesthetic APIs for injectable, topical and ophthalmic applications, allowing customers to source multiple products from one trusted partner.
European manufacturing with decades of know-how
With three cGMP, FDA-inspected production facilities in Switzerland and France, Siegfried offers a reliable European supply for anesthetic APIs. We are able to deliver consistent high quality and reliable supply thanks to decades of process and manufacturing experience.
Regulatory support for all markets
Siegfried provides regulatory documentation such as CEP, USDMF, JDMF or local ASMF depending on product. This ensure a strong base for customers active in international markets and looking for a partner with established dossiers and regulatory expertise across regions.
Cannabinoids
Siegfried provides high-quality synthetic cannabinoid APIs for pharmaceutical applications, combining decades of controlled-substance expertise with advanced development and manufacturing capabilities. Our integrated supply chain, GMP manufacturing footprint in the United States and Europe, and regulatory experience enable reliable supply of cannabinoid APIs to support customers from development through commercial scale.
High-purity synthetic cannabinoid APIs
Advanced synthetic routes enable the production of high-purity cannabinoid APIs, including Cannabidiol (CBD) and Dronabinol, designed to meet stringent pharmaceutical quality requirements.
Integrated supply chain and reliable global supply
Our integrated supply model, supported by qualified raw material suppliers and manufacturing capabilities in both the United States and Europe, helps ensure supply continuity and flexibility for customers worldwide.
Controlled-substance expertise and regulatory support
With extensive experience in controlled substances, licensing, scale-up, and regulatory requirements, Siegfried supports customers in navigating the complexities of cannabinoid API development and commercialization.
Controlled substances
Siegfried is a trusted partner for controlled-substance active pharmaceutical ingredients (APIs), combining decades of experience with rigorous regulatory compliance and secure, reliable supply. Our strong governance, robust quality systems and proven manufacturing expertise enable customers to navigate highly regulated markets with confidence.
Regulatory expertise and compliance
Siegfried has extensive experience in controlled-substance regulations across major markets. In the United States, we support customers through robust DEA compliance and quota management, while in Europe we have deep expertise in licensing and quota management with national competent authorities. Strong internal controls and audit-ready documentation underpin reliable regulatory compliance throughout the supply chain.
Integrated supply chain
Siegfried’s backward integration for poppy straw-based key starting materials strengthens supply chain security and reliability. Through our subsidiary, Extractas Biosciences, we produce key alkaloid-based starting materials, including Oripavine and Thebaine, providing greater control over critical supply steps and direct access to high-purity narcotic raw materials.
Responsible stewardship
Siegfried is committed to the responsible manufacture and supply of controlled substances. Through rigorous governance, secure handling procedures and responsible supply principles, we help minimise the risk of diversion and misuse while ensuring these essential medicines remain available to the patients who need them.
Cough, cold and allergy
Siegfried is a trusted partner for APIs used in cough, cold and allergy medicines, such as Caffeine, Pseudoephedrine, Oxymetazoline or Xylometazoline. With more than 75 years of experience, Siegfried stands for reliability an consistent long-term supply performance.
Reliable supply through backward integration
As the only world-scale producer of synthetic caffeine and pseudoephedrine in the Western Hemisphere, we help ensure a secure and resilient supply chain through backward integration, in-house manufacturing of all regulatory starting materials, multi-sourcing of raw materials, regional sourcing, and a global distribution network.
Quality and regulatory support
Our commitment to the highest quality standards and GMP compliance is complemented by regulatory support enabling access to more than 70 markets globally.
Customer focus
We put customers first by offering multiple particle size grades to meet a wide range of dosage form requirements, along with flexible packaging options in multiple pack sizes.
Pain management
Siegfried offers a broad portfolio of active pharmaceutical ingredients (APIs) for the treatment of acute and chronic pain. Our portfolio includes well-established molecules such as Hydrocodone, Codeine, Hydromorphone and Oxycodone, among others, supported by decades of expertise in the development and manufacture of highly regulated APIs.
Dual-region manufacturing
With manufacturing sites in both Europe and the United States, Siegfried provides regional supply options that enhance supply continuity and flexibility for customers serving regulated markets. Our established US manufacturing footprint and long-standing relationships with regulatory authorities support reliable market access and business continuity.
Broad portfolio and expertise
Siegfried combines a comprehensive API portfolio with deep expertise in the manufacture of highly regulated and controlled substances. Our scientific know-how, robust quality systems and regulatory experience enable us to consistently deliver products that meet the highest quality and compliance standards.
Reliable and integrated supply
A scalable global manufacturing network and an integrated supply chain help ensure a secure and reliable supply of critical APIs. Through its subsidiary, Extractas Biosciences, Siegfried produces key alkaloid-based starting materials, including Oripavine and Thebaine, providing greater control over critical supply steps and strengthening long-term supply security.
Our global manufacturing network for generic APIs
Europe
Zofingen
Zofingen is the headquarters of the Siegfried Group and one of Siegfried’s two launch sites for newly developed processes. The production site specializes in the development and commercial manufacturing of active pharmaceutical ingredients (APIs) and intermediates, including high potency APIs. Founded in 1873, the site has a broad portfolio of technological capabilities including hydrogenation, organometallic and hydride chemistry, halogenation, methylation, milling and micronization and more. All activities are conducted in strict compliance with quality standards (GMPs) and with safety, health protection and environmental standards.
Competencies
- Active pharmaceutical ingredients (API) and intermediates
- Highly active and controlled substances
- Custom synthesis

4800 Zofingen Switzerland
Evionnaz
Siegfried Evionnaz is one of Siegfried’s two launch sites for newly developed processes. It specializes in custom synthesis of active ingredients and intermediates for the pharmaceutical industry. With an R&D Center housing advanced chemical and analytical facilities, state-of-the-art laboratories, and cutting-edge technologies, it offers chemical process R&D and analytical development services for Siegfried’s global Drug Substances network. Established in 1957, the site has a broad portfolio of technologies including micronization, azide chemistry, hydrogenation, halogenation, organometallics, cryogenics, and more. Focused on niche technologies, the facility possesses development capacity from 1 gram to industrial-scale production. All activities are conducted in strict compliance with quality standards (GMPs) and with safety, health protection and environmental standards.
Competencies
- Active pharmaceutical ingredients (API) and intermediates
- Custom synthesis

1902 Evionnaz
Switzerland
Zurich
DINAMIQS, a Siegfried company, is a science-driven Contract Development and Manufacturing Organization offering end-to-end viral vector manufacturing solutions to accelerate gene therapy projects from DNA design to commercial scale. DINAMIQS offers a comprehensive and customized range of manufacturing services, process development, quality control and analytics solutions for genetic medicine companies.
Competencies
- Viral vectors

Hameln
Siegfried Hameln is one of Siegfried’s six Drug Products sites globally. It is a leading manufacturer of parenteral solutions, producing a wide range of aseptic and terminally sterilized products in ampoules and vials, with a dedicated development center for sterile injectables. Its specialization lies in the production of complex formulations, including anesthetics, flammable substances, oxygen-sensitive liquids, and cold chain products, all while ensuring strict compliance with quality standards (GMPs) and with safety, health protection and environmental standards. The site has a broad portfolio of technological capabilities including cold-chain handling, automated visual inspection and packing and more. All activities are conducted in strict compliance with quality standards (GMPs) and with safety, health protection and environmental standards.
Competencies
- Sterile and aseptic filling of ampoules and vials
- Biologics and small molecules

Minden
Siegfried Minden is one of Siegfried’s five run and deliver sites for established processes. It specializes in synthesis of active ingredients and intermediates for the pharmaceutical industry. Established in 1935 and focused on efficient operations and special technologies, the facility possesses production capacity from approximately 25 kilograms to multi-100-ton-scale production. The site has a broad portfolio of technological capabilities such as hydrogenation, organometallic and hydride chemistry, milling and micronization, halogenation and more. All activities are conducted in strict compliance with quality standards (GMPs) and with safety, health protection and environmental standards.
Competencies
- Active pharmaceutical ingredients (API) and intermediates
- Highly active and controlled substances
- Custom synthesis

Karlstrasse 15
32423 Minden
Germany
St.Vulbas
Siegfried St.Vulbas is one of Siegfried’s five run and deliver sites for established processes. It specializes in synthesis of active ingredients, intermediates and custom synthesis for the pharmaceutical industry. Established in 1993, the site has a broad portfolio of technological capabilities such as organometallic and hydride chemistry, phosgenation, hydrogenation, halogenation and more. All activities are conducted in strict compliance with quality standards (GMPs) and with safety, health protection and environmental standards.
Competencies
- Active pharmaceutical ingredients (API) and intermediates
- Custom synthesis

530 Allée de la Luye
01150 Saint Vulbas
France
Hal Far
Siegfried Malta is one of six Siegfried’s Drug Products sites globally. It specializes in the manufacturing of oral solid dosage forms (OSD), encompassing tablet and capsule formulations with diverse release profiles (IR, SR, DR), formulations and technologies. Established in 2007 as one of the first OSD sites within the Siegfried network, technologies range from dry blends, aqueous and organic – wet/dry granulation (bottom with Wurster technology and top spray), tableting, encapsulation, coating and blister packaging. The facility has the ability to produce manufacturing batch sizes on a mid – large scale, with a focus on tech transfer and scale up activities. All operations comply strictly with quality standards (GxPs), safety, health protection and environmental standards.
Competencies
- Bulk manufacturing and packaging of solid dosage forms for oral applications

Hal Far BBG 3000
Malta
Barberà del Vallès
Siegfried Barberà is one of Siegfried’s six Drug Products sites globally. It specializes in manufacturing and packaging solid oral dosage forms (OSD), including high-potency and inhalation capsules for treating respiratory diseases. Established in 1994, the site supplies products worldwide including Japan and the USA. It has a dedicated Development Center offering development and scale-up services for solid dosage forms and inhalation capules. The site has a wide range of equipment to produce solid formulations on a small and large scale, with blister, bottle and wallet/Shellpak packaging forms. Its state-of-the-art production equipment integrates Industry 4.0 technologies, such as digitization, system integration, robotics, and automation, ensuring precise processes. All activities are conducted in strict compliance with quality standards (GMPs) and with safety, health protection and environmental standards.
Competencies
- Bulk manufacturing and packaging of solid dosage forms for oral applications including high potency
- Inhalation capsules for medical devices to treat respiratory diseases

08210 Barberà del Vallès (Barcelona)
Spain
El Masnou
Siegfried El Masnou is one of Siegfried’s six Drug Products sites globally. It has a long track record of expertise in manufacturing aseptic products, with the site established in 1925. It is the largest factory in Spain specialized in ophthalmic products, both eye drops and sterile eye care ointments, as well as products for nasal and otic use. It has a dedicated Development Center offering development and scale up services focused on sterile ophthalmic products. The site’s technological capabilities include ball milling molturation, pre-use post sterilization integrity testing, and multi-dose round, oval and preservative-free bottles. Processes are fully automated and use cutting-edge technology, embracing Industry 4.0 technologies like system integration, robotics, and extensive automation. All activities are conducted in strict compliance with quality standards (GMPs) and with safety, health protection and environmental standards.
Competencies
- Bulk manufacturing and packaging of sterile ophthalmic products, including eye drops, eye ointments, otic/nasal sprays

08320 El Masnou (Barcelona)
Spain
USA
Irvine
Siegfried Irvine is one of Siegfried’s six Drug Product sites globally. It is a sterile drug product manufacturing site, specializing in innovative and difficult to manufacture pharmaceuticals, ophthalmics, and drug delivery devices. It provides cGMP sterile drug product fill and finish of biologics, suspensions, emulsions, ointments, and gels in a fully compliant manner. Established in 2002, the site’s technological capabilities include state-of-the-art filling lines for vials, droptainers and prefilled syringes; bulk filling capabilities; and low oxygen, light sensitivity, low humidity and non-aqueous product handling. All activities are conducted in strict compliance with quality standards (GMPs) and with safety, health protection and environmental standards.
Competencies
- Sterile and aseptic filling of large and small molecules

Pennsville
Siegfried Pennsville is one of Siegfried’s five run and deliver sites for established processes. It is Siegfried’s drug substance manufacturing site for the US market and provides spray drying operations globally. Established in 1928, its main activities are pilot and commercial manufacturing of drug substances (APIs) and intermediates, in a fully cGMP and SHE compliant manner. The site has a broad portfolio of technological capabilities including spray drying, organometallic and hydride chemistry, hydrogenation, milling and micronization and more.
Competencies
- Active pharmaceutical ingredients (API) and intermediates
- Highly active and controlled substances
- Custom synthesis

Pennsville, NJ 08070
USA
Grafton
The Siegfried Acceleration Hub in Grafton specializes in early-phase development and manufacturing. Established in 1998, the site offers phase-appropriate analytical and development services, regulatory expertise, and regulatory-compliant quality systems — all with the capability to manage highly potent and controlled substances. The Acceleration Hub provides end-to-end life cycle management with services from preclinical through commercial, including scale-up, tech transfer, validation and launch, with seamless transfer into Siegfried’s global network. The site has a broad portfolio of technologies and capabilities, including phase-appropriate preclinical process development, advanced filtration technologies, CMC sections of DMFs, alternate synthesis, route scouting and more. All activities are conducted in strict compliance with quality standards (GMPs) and with safety, health protection and environmental standards.

Athens

Wilmington
Siegfried Wilmington, is one of Siegfried’s five run and deliver sites for established processes. It is a large-scale commercial manufacturing facility for innovative products and controlled substances, supporting a wide range of therapeutic applications. Established in 1979, the multi-purpose site today offers 150 cubic meters of reactor capacity with a wide range of technologies, operating to the highest regulatory and quality standards.
Competencies
- Active pharmaceutical ingredients (API), Intermediates, Controlled Substances

Wilmington, DE 19801
USA
Asia
Nantong
Siegfried Nantong is one of Siegfried’s five run and deliver sites for established processes. It specializes in custom synthesis of active ingredients and intermediates for the pharmaceutical industry. Established in 2013, the chemical plant’s technological capabilities include organometallic chemistry, hydrogenation, alkylation, amination, chlorination and milling. All activities are conducted in strict compliance with quality standards (GMPs) and with safety, health protection and environmental standards.
Competencies
- Active pharmaceutical ingredients (API) and intermediates
- Custom synthesis

Nantong City, Jiangsu Province
P.R.C. (post code: 226017)
Australia
Westbury


