**7. Antidiabetic plants in clinical trials**

The following antidiabetic plants are currently under clinical trials viz:

*Allium cepa L., Clerodendron phlomoides Linn., Cinnamomum tamala (Buch.-Ham.) T. Nees & Eberm., Coccinia indica Wight & Arn., Enicostemma littorale Blume, Ficus bengalensis L., Momordica charantia L., Pterocarpus marsupium Roxb., Cyamopsis tetragonolobus (L.) Taub., Cephalandra indica Naud., Casearia esculenta Roxb., Cannabis indica (Lam.) E. Small & Cronq., and Syzygium cumini L. when subjected to clinical trials, showed promising hypoglycaemic effects*[43]. *Other potent antidiabetic* *plants in this category include Cecropia obtusifolia, Marrubium vulgare, Asteracantha longifolia Nees L., Panax quinquefolius L, Gymnema Sylvestre, Phyllanthus amarus, Opuntia streptacantha Lem*. They were found to produce beneficial effects on carbohydrate and lipid metabolisms when administered as an adjunct on patients with type 2 diabetes [44]. These plants have been reported to improve glucose tolerance in healthy human subjects and diabetic patients, caused significant reduction in blood glucose, glycosylated haemoglobin and glycosylated plasma proteins comparable to an oral hypoglycaemic drug [45].
