There was no needle inside the tube... do you think my dad was using drugs??
Perhaps... Could also be someone is injecting fruit with vodka -- something we used to do when I was a teen oh so many years ago. Or maybe your dad has an illness he hasn't told you about? Why do you suspect your dad of that in particular? Is there a history? Only you can know for sure, not us strangers lurking out here on the internets. I hope things aren't what you fear and that things work out for you.
Who knows what to make of this. If there's no needle, a syringe is useless. There isn't any drug that i can think of where a user injects something and eats a lime, but i have seen people inject tequila or vodka into a lemon or lime, and then eat the fruit. Also, when people are learning to be a medical professional or learning how to inject insulin for diabetes, they might practice injecting a lemon or lime. We have syringes lying around our house from using them to squirt medicine into our cats.
Was it a test tube? Sometimes people do shots (alcohol shots) in test tubes. Sarah
Hard to say. He could have been using it for something else too. /could have the liquid inside analyzed, but I agree talk to him, tell him what you found and voice your concern. What is the worse that could happen?