Exactly. The label says something along the lines of "IMP-#####" where "IMP" stands for 'investigational medicinal product' and the number is unique and tracked. Below that will be a dosage statement, a label with the patient's name and patient ID on it, and (in the UK at least) the legally-mandated words "keep out of sight and reach of children".

For orally dosed RCTs, often the pill making process is the way the blinding is done -- i.e. they're either in brightly-coloured gelcaps or a film or sugar coating. If it is a double-blind RCT it must be double blind. All of this will have been explicitly examined in the ethics statement for a trial and very, very prescriptively laid out.