No need to have medicine...try this home remedies helpful for u 
https://youtu.be/wpdhPs2pqcI

Hi take a healthy diet and add more amount of jeera in your food. You can also try mamaearth mama milk boost plus as it increases milk supply and improves health and is made of natural ingredients so no side effects

How old is your baby. 
For Milk production have one glass of milk before and after every feed. 
Also you can take ayurvedic powder to take along with milk.
You can take saunf, jeera.
Also have atleast 2 glasses of everyday.

My babys weight is 3.25..should i be worried...what should i eat for milk production..any medicine