I travel in and out of Australia regularly with prescription medication, as well as over the counter stuff like paracetamol.
As long as the prescription stuff is labelled, they never worry (at most they ask if you have enough for your stay in the country).
I generally declare it anyway, but the over the counter stuff - there's a checkbox on the arrival form for bringing in medicines that 'might be restricted'. To be safe I just declare everything, but as jpatokal has pointed out, none of the stuff you are bringing is on the list.
Fun fact: 90% of the time, declaring stuff seems to have a shorter line to get out the airport, so this works well for me ;)