Call: (979) 848-0800
DELIVERING, EXPANDING, ADVANCING The science of radiopharmaceuticals

Products and Services

IsoTherapeutics Group is a radiopharmaceutical development company that launched R&D services in 2005 to aid customers and collaborators in the development of pharmaceuticals. The company has earned a solid reputation in radiochemistry, radiolabeling, and process/product development. IsoTherapeutics Group has recently enhanced its capabilities to help customers with cGMP radiopharmaceutical manufacturing for clinical trials. This helps ensure seamless development of products from research to clinical trial-stage manufacturing.

IsoTherapeutics offers host of services to the pharmaceutical and life-science industries. The company specializes in R&D of radiopharmaceuticals that are targeted at detecting and treating debilitating diseases. The range of services include helping customers/partners with early stage research from proof of concept for a new chemistry or drug molecule through making of the drug in a cGMP facility for preclinical studies.

These services include:

  • Radiopharmaceuticals
  • Chelation
  • Conjugation
  • Isotope Selection
  • Radiolabeling
  • Analytical
  • Small Animal Studies – Pharmacokinetics / Bio-distribution
  • Target processing/Radiochemical processing
  • Kit Development and manufacturing
  • GLP and cGMP Manufacturing Services

The company also plays an advisory role based on its 100+ years of collective experience. The company works with customers in a variety ways and engages with customers every step of the way with the final goal being reduction of costs and shortening of the time to clinical trial.

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In the company’s short history, IsoTherapeutics has been able to serve a variety of customers including:

  • Actinium Pharmaceuticals, Inc.
  • Advanced Accelerator Applications
  • Andarix
  • AstraZeneca
  • Biogen Idec, Inc.
  • BioPact
  • BioNucleonics
  • CGM Nuclear
  • Clear Vascular, Inc.
  • Curium
  • Cytogen Corporation
  • The Dow Chemical Company
  • Excel Diagnostics, Inc.
  • FUJIFILM Pharma US
  • The Gabriel Institute, Inc.
  • Goodwin Biotechnology, Inc.
  • ImaginAb, Inc
  • Immunicon Corporation
  • International Isotopes
  • NorthStar Medical Radioisotopes, LLC
  • Mallinckrodt
  • MI Bioresearch
  • MabVax Therapeutics Holdings, Inc
  • Nova Biologicals
  • Pfizer, Inc.
  • Progenics
  • RadioMedix, Inc.
  • Responsible Community Design International, Inc.
  • Relypsa
  • Serene, LLC
  • Siemens
  • South Texas Nuclear Pharmacy
  • Strategia
  • TcNet, LLC
  • Theragenics
  • Triad Isotopes, Inc.
  • Valerion Therapeutics, LLC
  • Versartis
  • Vivos, Inc.


A small company with high caliber people. This company helped me address critical questions posed by the FDA.

Ebrahim S. Delpassand, M.D.
Chairman & Medical Director Excel Diagnostics

This company treats customers as partners and truly provides the best value for your R&D dollars. Check them out whenever you need help with radiochemistry.

Stan Stearns,
President & Founder, Valco Instruments Co and The Gabriel Institute

This is the first company I will call when- ever I need help with developing radio- pharmaceuticals.

David W. Mueller, Ph.D.
CEO, Clear Vascular, Inc.

Contact Us

IsoTherapeutics Group, LLC
1004 S. Velasco St.
Angleton, TX 77515

Phone (979) 848-0800
Fax (979) 848-0807