1mg is a marketplace and facilitates the fulfilment of orders via registered pharmacies or vendors partners. The vendor procures the stocks from the manufacturers on regular intervals and a new stock may have different batch number and price. 

Considering multiple vendors throughout the country, 1mg updates prices as per the current nationwide price list. This happens with every fast moving consumer product in the market and medicines are one such category of products. The final payable amount may vary depending upon the batch price and/or discounts offered by a particular vendor.