Oh for fuxsake. You are drugging -- and this is serious drugging, clonidine? risperidone? THREE? -- your child because (1) your physician is a quack and (2) you can't parent?
My heart breaks...
READ
http://www.psychologytoday.com/blog/freedom-learn/201110/why-young-children-protest-bedtime-story-evolutionary-mismatch
http://www.aces.edu/pubs/docs/H/HE-0687/
http://www.aces.edu/pubs/docs/H/HE-0684/
http://www.aces.edu/pubs/docs/H/HE-0718/
http://www.aces.edu/pubs/docs/H/HE-0719/
http://www.ahaparenting.com/parenting-tools/positive-discipline/positive-discipline
http://neuroanthropology.net/2008/12/21/cosleeping-and-biological-imperatives-why-human-babies-do-not-and-should-not-sleep-alone/
http://www.kathydettwyler.org/detsleepthrough.html
http://www.ahaparenting.com/parenting-tools/positive-discipline/Parenting-Strong-Willed-Child
On some level you MUST be aware that these "diagnoses" are fad diagnoses, that nobody was drugging children like this less than a generation ago...? _Medication_ for "tantrums and noncompliance" at THREE!
Have you heard of parenting classes for mothers of your age?