Indian medical researchers say they have successfully tested a blend of curry spices that lower blood pressure in lab rats raising hopes for a natural and affordable drug to treat the chronic disease. S. Thanikachalam a cardiology expert who headed the research said his team had tested a mixture of ginger cardamom cumin and pepper -- common ingredients in Indian kitchens -- along with white lotus petals and others on the rodents. 'We saw tremendous positive changes in rats induced with high blood pressure during our laboratory experiments' said Thanikachalam who heads the department of cardiology at Sri Ramachandra University