Zero!!! Even IF there was such a pill, it wouldn’t solve the problem. Drunks wouldn’t take it when needed because they aren’t drunk…only having a good time. Have you ever tried to take the car keys from a drunk so you can get them home??? They REFUSE because they are still good to drive & aren’t going to harm anyone. When they leave, you’re NOT allowed in their car because you’re a buzz kill!!! I dated a guy who was an alcoholic & I tried talking to him about his drinking problem (while he was sober). He laughed at me & then informed me that HE did NOT have a drinking problem…I had the drinking problem. When he drank, he had NO problem. Yet when he drank that I was the one who had the problem. His liver died about 2 weeks later & so did he. Even if I had handed him such a pill, he would have REFUSED to take it!!!
I haven’t drank in over 58 years, so I wouldn’t need one even if they were paying me to take one!!!