NCT04195191.

Methods	Study design: RCT Duration: 10 weeks Location: Spain
Participants	Population: adults with COPD, arterial hypertension, diabetes mellitus Baseline characteristics: NR Inclusion criteria: diagnosis of COPD, arterial hypertension or diabetes mellitus, using anticoagulants Exclusion criteria: not fluent in Spanish, physical or mental disorder hindering participation in the study
Interventions	Treatment arms Pharmaceutical communication through conversation between pharmacist and patient Placebo (usual practice by community pharmacies)
Outcomes	Primary outcome: adherence to treatment at 10 and 26 weeks Secondary outcome: satisfaction with the service
Notes	Funding: Andalusian School of Public Health Identifier: NCT04195191, 2018713122010