The presence of a “present/absent/unknown” leads me to think that we’re looking at a questionnaire. Since hypertension, diabetes, etc are problems, diagnoses or conditions, I would think the ‘Condition screening questionnaire’ (https://ckm.openehr.org/ckm/archetypes/1013.1.4442) would be your top level archetype. Further, the medications currently used could be expressed using the ‘Medication screening questionnaire’ archetype (https://ckm.openehr.org/ckm/archetypes/1013.1.4677). The highest blood pressure can be expressed using the blood pressure archetype, perhaps using an interval event with the mathematical function “maximum” if appropriate. I’m not sure exactly what is meant by “status after taking medicine”, so I’d need some more context to give advice about that.
These archetypes are all OBSERVATIONs, and can’t be nested within each other. However, the template could potentially provide the necessary context to bind the information together, the archetypes don’t necessarily need to be nested to show a relationship.