If you are arrested for a drug-related crime, you are not going to just head to court to defend yourself. Whether you go through the federal system or the Ohio state system, there will be several steps before you even get to a trial.
Let's imagine you are arrested and charged under Ohio laws. Your case will go through the state courts and will follow Ohio criminal procedure. The rules of criminal procedure can be found here, but in this post, we will highlight some of the steps that come before trial.