Overcoming the High-Viscosity Drug Injection Challenge with Unique Precision Springs & Metal Components from RPK Medical

Delivering high-viscosity drugs is one of today's biggest challenges in autoinjectors, pen injectors, and on-body delivery systems (OBDS). Biologics, such as monoclonal antibodies, lipid-based formulations, or long-acting therapies, are often much thicker than water, placing pressure on standard device designs.

At RPK Medical, we design and manufacture custom springs and precision metal parts that enable these injections, without compromising comfort or reliability. Our specialization empowers pharma companies and CMOs to overcome these obstacles from the inside out, instilling confidence in our ability to deliver effective solutions.

Why involve RPK Medical early?

The earlier we're part of the device design and engineering process, the better we can help optimize:

• Spring force and control, for smooth delivery even with 30-second injection times.
• Material selection for long-lasting performance.
• Compact mechanical designs that save space and increase efficiency.
• Manufacturing and cost efficiency from day one.

Tailored metal spring and stamping solutions for high-viscosity injectables:

• High-force springs and constant force springs tailored for thick biologics.
• Multi-stage mechanisms, like telescopic or concentric springs, that deliver the drug in controlled phases.
• Integrated power packs combining springs, like constant force and power force springs, and stamped components.
• Testing and simulation based on the drug's viscosity profile and use case.

RPK Medical partners with pharma and CMOs to make sure the core mechanics of each device are designed to handle the demands of today's most advanced therapies.

Curious to learn more about how RPK Medical can help you overcome high-viscosity drug injection challenges? We invite you to explore our solutions and see how we can co-engineer the future of high-viscosity autoinjector technology.