Hi bunni, if it's ok with you I am going to edit the title of your thread because asking which formulation of a drug people "prefer" is not really suitable for Basic Drug Discussion. It seems like your question is more than that though and you are asking what the difference is between different formulations is and whether the formulation you have is instant release or time release, so I will leave your thread open for now but will change the title. (People can talk about the facts, like you could say "IR formulations have a faster onset and stronger peak than ER formulations", or "ER forms last longer", but not stuff like "brand A gets me way higher than brand B" or "drug XYZ is the best benzo" - hope that makes sense?)