I was hospitalized for schizoaffective disorder and given a high dose of liquid medication every night to knock me out. I can’t remember the name of it but I think it originated in Spain. Google isn’t helping me and probably now thinks I am trying to smuggle drugs into the US. Lol.
But weren’t you given it in France, which is in Europe? So based on the info you’ve given, it might be the answer to your question?