How does psychiatric environment affect the behaviour and what are the ethical issues with the use of prn medication and the use of restrain

This paper is meant to be presentation speech about
how the psychiatric ward environment affect the behaviour such as agitation, anxiety and other behaviour . which may lead to the increase the use of prn medication and the use restrains
The second part is what are the ethical issues with the use increase use of prn and restrains . all the four ethical principles must be discussed autonomy , beneficence , non beneficence, justice.
there should be headings and followed by discussion for each point.