It's been a long time since I was on methylphenidate, but I believe I did drink occasionally at the time. I'm on other stims now.

Generally just be careful because you'll feel less drunk than you are. Stay hydrated.

I've had drinks on methylphenidate many times and it hasn't been a problem. Well, the biggest problem was getting a worse buzz from the drink, really. Probably wouldn't recommend heavy drinking, especially if you're on higher doses, but a glass of whiskey in the evening every now and then should be fine. Depending on when you take your meds in the morning and when you have your evening glass of whiskey most of the methylphenidate will probably be out of your system anyway.

Zero interaction with the two in my experience, although I rarely even have a drink until hours after the expected duration so it has probably worn off. One drink with lunch doesn't seem to be any different than before the meds to me either.

I have had a few drinks on Ritalin and it feels like the drink doesn't do much. I have read that lots of alcohol can cause heart arythmia with methylphenidate but that's not 1 drink.

If it's short acting and you don't experience negative effects when you miss a dose you could always skip for a day you wanna relax and have some wiskey

I'm on 36 mg ER. I drink 3-6 drinks a week with no ill effects. You should be fine with some scotch. If anything odd happens, counsel with your doctor on it. I would also say it's a bit of a wasted pill as being inebriated kinda defeats the purpose of trying to feel "normal", and the more you frequently you take these you slowly build up your resistance to them so keep that in mind. I try to take breaks on the weekends at least. That's just my experience.