Enabling Preclinical Formulation Services

Take your drug from the lab to clinical trials by overcoming solubility challenges.

At Solitek, we transform poorly soluble active pharmaceutical ingredients (APIs) into effective, stable formulations to ensure the success of your toxicology, efficacy, and pharmacokinetic studies.

solitek-pharma-50-years-experience

Maximum Solubility

We have achieved concentrations up to more than 800 mg/mL for complex molecules through custom-tailored formulations.

API Savings

We used optimized protocols to obtain maximum results while consuming the minimum amount of material (milligrams).

Biorelevant Simulation

We evaluate drug response in simulated gastric and intestinal fluids to predict behavior in animal and human studies.

+ 40 Years of Solid State Science

Over 40 years dedicated to solid-state science, its development, and optimization.

Formulation Development Services

Nearly 80% of drugs suffer from poor solubility, and advancing to preclinical trials without the right formulation is practically a guarantee of failure. This can result in:
formulation-development-services

Insufficient Absorption in Preclinical Trials:

Poor solubility prevents the drug from entering the bloodstream in the concentration needed to achieve a therapeutic effect.

Variable Preclinical Data:

Drug precipitation in the intestine causes absorption results to vary too widely between subjects, undermining the reliability of the study.

Waste of Promising Drug Candidates:

Formulating without a prior strategy quickly depletes valuable active pharmaceutical ingredient before valid results can be obtained.

Regulatory Roadblock:

Lacking a tolerable formulation stalls program progress and delays the submission of dossiers to regulatory bodies.

Devaluation of the Candidate:

A poor absorption profile undermines buyer or licensee confidence, devaluing the candidate's commercial potential.

Our Enabling Formulation Services

Solitek helps you find safe, stable vehicles that maximize your API's exposure in the body

1. Rapid Excipient Screening

We rapidly screen different approved cosolvents, lipids, and additives at microscale to find the perfect blend that dissolves your drug without causing toxicity.

2. Amorphous Solid Dispersion (ASD) Development

We stabilize your drug in its high-energy amorphous form using polymer matrices, preventing recrystallization back to the more stable — but less soluble — crystalline form, and unlocking superior dissolution.

3. Lipid-Based Formulations and Nanoemulsions

We design self-emulsifying, lipid-based systems that keep poorly soluble drugs fully dissolved and ready for absorption throughout the entire intestine.

4. Biorelevant Dissolution Testing

We test how the drug dissolves and behaves in simulated gastric and intestinal fluids under different conditions, to ensure its stability before advancing development.

Strategic Benefits of Partnering with Solitek for Early Formulations

Enabling Formulation & Bioavailability Enhancement

Overcome solubility challenges and accelerate your transition to the clinical phase:

If You're a Biotech:

We optimize microscale protocols, maximizing your API material while meeting the highest safety and toxicity standards.

If You're a Generics Company:

We design advanced, non-infringing formulations to overcome patent barriers, ensure success in bioequivalence studies, and accelerate your time to market with reliable protocols and formulations.

If You're a Pharma Company:

We accelerate your clinical programs with advanced, scalable formulations that resolve regulatory challenges, ensuring a frictionless transition to animal or human trials.

Testimonials from Pharmaceutical Companies That Have Already Put Their Trust in Solitek

Posted on Google
Neil Sim profile picture
Neil Sim
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
At HFR, we have collaborated with Solitek across numerous projects for a number of years. Across all projects that we have collaborated on, I have felt that Solitek really work to fully understand the project from the outset. Victor, Steve and all of the team provide expert knowledge across the solid state landscape and combine a methodical approach with scientific rigour. Their communication and reporting is thorough and clearly presented, providing further value when working on more challenging and complex landscapes.
Posted on Google
Anthony Debono profile picture
Anthony Debono
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
I have collaborated directly with Solitek on a number of projects. I highly recommend the team. They combine deep technical expertise and experimental know-how, with an efficient and collaborative customer service. Thanks to their decades of experience in the field they are able to give solid advice on development approaches and are proactive and transparent during project execution.
Posted on Google
Josep Castells profile picture
Josep Castells
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
La experiencia con Solitek durante el desarrollo de una molécula activa farmacéuticamente fue muy positiva por su gran profesionalidad y la capacidad de superar los retoques técnicos.
Posted on Google
Adria Espinas Torres profile picture
Adria Espinas Torres
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Great experience working with Solitek from Farmhispania Group on solid-state projects. We collaborated in the development of robust and scalable API crystallization processes and solid form selection and characterization, and they always bring clear, practical solutions. Working with Steve, Víctor, and the rest of the team has been very smooth, with close and easy communication throughout. They are agile, adapt well to project needs, and are strongly results-oriented. Strongly recommended!
Posted on Google
David profile picture
David
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
AKL Therapeutics had approached Solitek regarding an unusual and difficult issue associated with a liquid eutectic formulation. Solitek devised a clear and systematic plan of investigations to solve the outstanding problems and were well equipped to conduct the necessary specialist studies in this area. The staff have very good practical knowledge and experience in the area of pharmaceutical formulation development. The investigations Solitek conducted proved to be fully enlightening as to and understanding of key issues involved in the development of a suitable formulation for the concerned molecules. The standard of reporting was excellent with regular scheduled updates that were well communicated by the Solitek team. We would certainly recommend Solitek as a competent and capable partner in the area of pharmaceutical formulation development. John McCrerie for AKL Therapeutics
Posted on Google
Ernesto Durán López profile picture
Ernesto Durán López
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Over the past few years, we have carried out several collaborations with Solitek to address different aspects related to the solid‑state development of pharmaceutical active ingredients. These projects have included salt‑screening studies to modulate API solubility, the exploration of new polymorphic forms and co‑crystals to help overcome IP barriers, and the optimization of process parameters to enhance the robustness of crystallizations at industrial scale. Throughout all these collaborations, the Solitek team has consistently demonstrated strong technical expertise, provided high‑value scientific input, met every agreed timeline, and delivered reports of outstanding quality. Without a doubt, having them by our side when complex challenges arise makes a real difference.
Posted on Google
DBS Chen profile picture
DBS Chen
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
With over 20 yrs of outsourcing experience, I have to say Solitek is efficient, comprehensive, and budget-friendly. Their expertise gives me peace of mind when they handle my projects.
Posted on Google
Marta Monjo profile picture
Marta Monjo
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Solitek nos ha ayudado muchísimo en la optimización y el escalado de nuestro proceso. Han demostrado un gran conocimiento técnico y una excelente capacidad para encontrar soluciones prácticas a los retos que han ido surgiendo durante el proyecto. Los estudios de familiarización realizados posteriormente en planta kilo-lab fueron todo un éxito y nos aportaron información muy útil para seguir avanzando. Además, durante todo el proceso de industrialización han seguido brindándonos apoyo y asesoramiento ante cualquier consulta o necesidad que ha surgido, demostrando un gran compromiso con el éxito del proyecto. Ha sido un placer trabajar con un equipo tan profesional, cercano y comprometido. Muchas gracias!
Posted on Google
I Maikel profile picture
I Maikel
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Nuestras colaboraciones con Solitek han sido muy satisfactorias. Su profundo conocimiento del estado sólido, y de los procesos de optimización y escalado han rendido procesos sólidos, fiables, bien documentados y fáciles de transferir. Un placer trabajar con ellos.
Posted on Google
Jacques Alain Bauer profile picture
Jacques Alain Bauer
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
The experience with Solitek Pharma projects were perfect, with real-time communication, very flexible collaboration and excellent reporting.
About Solitek Pharma

Company specializing in enabling formulation services

company-specializing-in-enabling-formulation-services

Solitek Pharma was founded to reduce risk and prevent costly failures in small molecule drug development, drawing on over 50 years of accumulated experience in the pharmaceutical industry, including more than 40 years focused specifically on solid-state science.

Our expertise was built at internationally recognized pharmaceutical companies such as GSK, Johnson Matthey, and Almac, Spanish companies such as Esteve and Medichem, and specialized solid-state teams such as Pharmorphix and Enantia.

We have participated in more than 1,000 drug development programs, giving us the practical perspective needed to approach each project with a clear sense of what truly needs to be accomplished and decided at every stage.

Our current company, Solitek Pharma, was founded in 2021 and is based at the Barcelona Science Park (Parc Científic de Barcelona), a hub for operations and specialized talent in our sector.

We are an agile team of experts who work closely with our clients, integrating as an extension of their development teams. We focus on what’s needed here and now, helping projects advance with lower risk and greater value for future partners.

"The team at Solitek is world-class. Experts in their field and with a customer-focused attitude, they have supported us on multiple solid state projects over the years, consistently delivering both in terms of technical execution and clean project management and reporting”.
Anthony Debono
Head of R&D API – Medichem, SA
"Solitek provided a highly professional and efficient service, supporting the scale-up process with clear communication, technical expertise, and reliable results".
Marta Monjo
Full Professor at Universitat de Les Illes Balears
“Trabajar con Solitek ha sido un placer. El reto técnico al que se enfrentaban era muy complejo y lo resolvieron con optimismo, eficiencia y rapidez. Colaborar con ellos resultó sencillo y ágil. Su conocimiento técnico y su excelente actitud para afrontar y superar desafíos los convierten en un aliado clave para nuestros proyectos en estado sólido y polimorfismo.”
R&D Director
CDMO & Generics Company
‘Efficient, comprehensive, and budget-friendly, Solitek delivered results that exceeded expectations by identifying polymorphs overlooked by another lab. Their expertise gives me peace of mind when outsourcing my projects.’
Wen Chen
Head of CMC at Eccogene, Inc.

Working Together and Strategic Partners

The Value of Experience in Enabling Formulation
logo-gsk
logo-johnson-matthey
logo-almac
logo-medichem
logo-pharmorphix
logo-agility
logo-annion-pharma-consulting
logo-esteve

Our 3-Step Work Process

Seamless integration as part of your own laboratory
STEP 01
Technical Assessment and Scope Definition

We analyze your existing API data, identify crystallization risks, and define key objectives (polymorph, PSD, purity, yield)

STEP 02
Testing Execution and Process Optimization

We execute the work plan at our facilities in the Barcelona Science Park, using advanced characterization and screening tools to reduce risk and optimize every phase of the process.

STEP 03
Clear, Data-Driven Action Plan

We deliver a detailed, actionable technical report, ready for use in regulatory audits or direct transfer to your CDMO.

Frequently Asked Questions About Enabling Formulations Services

An enabling formulation is a technical vehicle designed to temporarily solubilize and stabilize molecules with poor solubility (BCS Class II/IV). Its purpose is to ensure adequate in vivo exposure during PK, efficacy, and preclinical toxicology studies.

At Solitek Pharma, we use microscale screening protocols that allow us to evaluate dozens of excipient combinations while consuming only fractions of a gram of API — making this approach highly cost-effective for early-stage development programs.

We specialize in oral and injectable solutions, as well as stabilized oral suspensions, designed from a deep foundation in solid-state science and crystallization behavior. 

This approach allows us to select the optimal solid form and formulation system from the outset — avoiding the trial-and-error excipient screening typical of generalist providers. Other technologies, such as ASD or HME, can be used to address specific challenges.

We evaluate in vitro dissolution, solubility and precipitation behavior using physiological, biorelevant media (FaSSIF/FeSSIF) that simulate the human or animal species gastrointestinal environments, providing strong predictive insight ahead of in vivo studies.

Do You Have a Promising Drug That's Insoluble?

Don’t let solubility issues stand between your molecule and clinical trials.

Partner with Solitek Pharma’s solid-state and enabling formulation experts to maximize in vivo bioavailability.