From: Comparison of Buyang Huanwu granules and Naoxintong capsules in the treatment of stable angina pectoris: rationale and design of a randomized, blinded, multicentre clinical trial
Intervention groups
Naoxintong capsule
Capsule placebo
Buyang Huanwu granule
Granule placebo
Intervention group 1
✓
Intervention group 2
Control group