It is common belief in Indians that herbal drugs or Ayurveda medicines are always 100% safe and doesn’t produce any of the adverse effects but which is not always true, well this is shown by our case report where the adverse effect were seen in the form of generalized weakness and giddiness. A South Indian Male patient of age 45 years who was resident of Belgaum for 10 years. Patient consulted us for the complaints of sudden weight gain with the associated complaints like heaviness of body, laziness etc. Giddiness and generalized weakness disappeared when dose of Lekhanabasti was reduced. Direct relation (score 6) were the causality according to Naranjo's Adverse Drug Reaction Probability Scale. This report highlights the importance of Preassessment and awareness towards the careful use of Ayurveda medicines like that of contemporary medications