LSD won't help you with women, trust me.
You are actually asking for a "magic pill" to make you better at picking up women.

A lot of times noobs will indirectly ask for something like this in a metaphorical sort of way, but here you are literally asking for a drug that will make you better at pick up. That's not good bro, not good.
You have admitted that you have a mental sticking point which prevents you from approaching. Your inner game is messed up....badly.
There is actually a remedy for this which is mentioned all the time in this forum. You can approach men, wait staff, employees, and start up random conversations. Do this anywhere you go. Tell the girl at McDonald's "How's your day going so far?" Just get used to being conversational and personable. If you allow yourself to get frozen up inside your head with all this self-doubt, then no magic pill in the world will benefit you.