Objectives
To design an educational intervention on sexual dysfunction for patients suffering from schizophrenia and diabetes based on patients' and other relevant stakeholders' preferences, and to offer transparency into the basic decision-making process behind a final design.

Methods
We conducted a three-part investigation to explore theory, preferences, and feasibility based on literature searches and interviews with patients, healthcare professionals, heads of Assertive Community Treatment Centres and experts. Based on a content analysis of this material, a draft of the intervention was developed. The draft was quality-checked by involvement of stakeholder representatives and refined to its final design.

Results
The intervention evolved into having two components: One intervention for patients and one for healthcare professionals. In patient education, meeting peers and predictability were important factors. For healthcare professionals, daily clinical activities were prioritised.

Conclusions
We present a framework for an educational intervention about sexual dysfunction, schizophrenia and diabetes targeting both patients and healthcare professionals.

Innovation
The transparency of the design process underlying the interventions allows for reproduction and eases further refinement, extension, and adjustment if implemented in other contexts.