I have just started using conolidine 1. There is a bit of a sting when put under your tongue. I use a small piece of ice to be more comfortable. There is a new and stronger formula that is said to reduce the sting. I haven’t tried it yet. There is an almost immediate numbing of the tongue and gums. I have been using it to reduce joint pains. It definitely helps me to sleep better. And my problem joints are a bit better during the day.