About Us


Synergy Homeopathic (formerly KHA) is an innovative, international company comprised of a core group of renowned homeopaths who are passionate about the discipline of homeopathy and the community it serves. We are dedicated to empowering practitioners, teachers and students alike through the development of reliable, comprehensive homeopathic software and teaching tools.

In 1986, David Warkentin purchased his first computer and started to develop the homeopathic software programs that we now know as MacRepertory and ReferenceWorks.
Having held the previous conviction that computers were cold, lifeless things he was amazed, when a friend introduced him to the Apple Macintosh, to discover something powerful, visually pleasing and actually quite fun. He was instantly hooked, sure it would be just what he needed to create the extensive homeopathic software he envisioned.

David was first and foremost a designer and a man of great creative vision who, along with the help of an inspired team (and his trusty Mac), was able to successfully distill the complex processes of case analysis into these extensive and insightful programs that have gone on to become the world’s standard for homeopathic software.

MacRepertory and ReferenceWorks have advanced homeopathic theory and practice across the world both directly and through the support of visionary homeopaths as they delve into new territories.

MacRepertory is our repertorization tool. It makes it easy to analyze each case, select rubrics and check the materia medica, providing the practitioner with confidence about their prescription.

Referenceworks is a rich and revolutionary search and analysis system utilizing a vast library of more than 850 volumes of materia medica, provings, journals and more. You can simply search, in your patient's own words, within the extensive library to instantly discover the most likely remedies for your case.

At their root, MacRepertory and ReferenceWorks were created out of a vision. And as always, the vision, innovation and drive to advance homeopathy is still at the heart of what we do. Today, our patron Dr. Rajan Sankaran leads a company committed to developing this software as the homeopathic tools of the future.


At Synergy we have our gaze firmly fixed on the future. Our aim is to inspire and encourage homeopaths all over the world through our software, education, collaboration and interaction with the community.

We are also dedicated to sharing as much as we can about the inspiring individuals in the homeopathic community who are at the leading edge of theory and technology or simply advancing homeopathy in their own way.

Our dedication to education sees HOPE, our Homeopathy Online Portal for Education, providing hundreds of hours of video lectures by leading experts in each area as well as lectures on all contemporary approaches to practice.

We look forward to many years of continued partnership with our community of friends and supporters.


Homeopathy Online Portal for Education
Access hundreds of video lectures by leading experts and explore diverse approaches to homeopathic theory and practice. HOPE gives you access to world-renowned teachers and provides an inspiring and unforgettable learning experience.



Should you have any technical issues or problems navigating your MacRepertory and ReferenceWorks Edition we are always available. Get in touch with our Technical Support team who are here to help you get the best out of your software.



Synergy delights in bringing the community together. The “Be Inspired” section of our website features new books, events and many interesting and inspiring activities that homeopaths are involved with worldwide. We welcome you to submit your own “inspired” stories, experiences and events.