Cassia seed extract cassia seed efficacy and role 1. Antihypertensive: Water infusion and ethanol infusion have antihypertensive effects on anesthetized dogs, cats and rabbits. 2. Antibacterial effect: Cassia seed alcohol extract has an inhibitory effect on staphylococcus, diphtheria bacillus, typhoid bacillus, paratyphoid bacillus, and E. coli, while water extract is ineffective.