Another option is to base the drug name on the appearance or function in the story. If the drug is a bright blue liquid that gives super strength, you could call it 'BluePower'. This directly ties the name to what the drug looks like and what it does in the context of your story.
You can also look at the origin or history of real drugs. Some drug names are derived from Latin or Greek words. You might take inspiration from this and create a fictional drug name that has a similar etymological root. For instance, if you want a drug in your story that has a calming effect, you could use a name like 'Pacifica', which is related to peace in Latin.