The present invention provides a method for coating the nanomagnetic particles using anaesthetic drug comprising the steps: (i) synthesizing nano sized magnetite magnetic particles using chemical co-precipitation technique (ii) aqueous based slurry of the said particles are further used for coating procedure (iii) wet magnetite particles are mixed with lignocaine hydrochloride molecules in presence of carbodiimide the above mixture is kept in rotary shaker for uniform shaking at room temperature for 3 to 5 hrs after shaking, the coated nanomagnetic particles are washed several times with water to get rid of unreacted and/or free drug molecules.
