I am tired of being told that 5 mg of prednisone doesn't have side effects. My doctor told me that too. Yes it can and does. Esp after 16 years on prednisone.
Absolutely anything that you put into your body has the possibility of causing behavioural changes, and not all behavioural changes are bad by the way. Hormones and neurotransmitters are the two primary components that will affect behaviour. Prednisone is a hormone and will likely cause behavioural changes but it's all so individual that chances are your experiences will be your own and not terribly relevant to anyone else's. Aging, sleep or lack of, diet, pregnancy, sex or lack of, and just about any major event in a person's life can alter one's behaviour and/or disrupt the hormonal and neurotransmitter environment in one's system. Just because it can doesn't mean it will, and I think a person's view of their own behaviour is often in contrast to how the rest of the world would describe them, so you may not notice changes that others will see or you may think you've undergone dramatic changes only to hear that no one else has noticed. This is part of what makes the human experience so fascinating to me. I see nothing taboo about discussing it so long as people refrain from negatively or presumptuously commenting on another person's journey through renal failure.