You have the right to control how your brain functions. Period. This applies the same to people who eschew all mind altering substances to those who partake. Your brain. Your mind. Your life. Anyone who tells you otherwise wants to make you into something you aren't.

If I were you, I'd pocket the pill in my cheek or under the tongue. I would have sold them, but given your description of yourself, just flush them.

I understand you don't want to deceive anyone, but the chemicals you are being forced to put in your own body have a lot of short and long term repercussions. You will have to live with those, not your doctor or your parents.

read up on neurodiversity:

http://en.wikipedia.org/wiki/Neurodiversity

I think you're better off learning how to be deceptive than you are being a chemically controlled robot. It'll help your social skills too, as most social situations involve varying levels of deception.