Karamba in India is the name of a plant defined with Gardenia turgida in various botanical sources. Source: Google Books: CRC World Dictionary (Regional names) For the possible medicinal usage of karamba, you can check this page for potential sources and references, although be aware that any some or none of the side-effects may not be mentioned here, wether they be harmful or beneficial to health. Karamba in the Marathi language is the name of a plant identified with Olea dioica Roxb.
Karamba in Biology glossary Source: Wisdom Library: Local Names of Plants and Drugs