Background: Diabetes is a metabolic disorder that results in increased blood sugar. This study came up with a search for alternative medicines with no or fewer side effects for antidiabetic therapy. Materials and methods: The plants are extracted and screened for the phytochemical study of crude extracts. Anti-diabetic activity in alloxan-induced hyperglycaemic rats, in a single-dose study, multiple-dose treatment was investigated. In vitro cellular assay using 3T3L1 cell line was performed to check the cell viability with increasing plant extract treatment. Results: Phytochemical investigation reveals the presence of alkaloids, flavonoids, saponins, tannins, steroids, triterpenoids, carbohydrates, and glycosides in both plant extractions. In acute toxicity studies, no mortality was observed with either of the extracts even at a dosage of the level of 5000 mg per kg of body weight. The ethanolic extracts showed a noteworthy decline in blood glucose level in alloxan-induced rats in both single and multiple dosage methods. Significant changes were observed in the serum glucose and body weight from day 0 to day 14. The cell viability of the extracts was also comparable with the standard. Conclusion: Our results report that CQ fruits and MC leaves have potent antidiabetic action and on further studies, can be a credible resource in antidiabetic therapy.