Hello and thanks for the question. That's a good one. I am not fully sure but do know that the FDA has been trying to crack down on abuse of immodium for a while and got serious about it in 2018. They very well may be requiring a less dosage in the current product. This is their current website with products availalbe and strengths. https://www.imodium.com/anti-diarrhea-medicine/how-imodium-works It looks like the 2mg is still available.