Hey there @rosa, there's a reason why drugs would require the usage of a lab, mostly because the creation of drugs require a lot of decent chemical knowledge and experience to be able to create them, not to mention resources to allow for trial and error until you get the correct formula. Drug schemes require that the gangs go on and collect the ingredients necessary for the creation of the drug and that is obtained either illegally or legally.
Either way, if you believe that you have managed to RP your way into a certain drug creation, then by all means, feel free to post on the IFM schemes and IFM will go on to read through your RP and determine if it is sufficient or if it would be realistic to create a certain drug.
Anyway! This topic has been L&A'd, I hope all the above answers your questions!