Parodils?

I wandered lonely in a crowd
That moved towards the checkout tills
When all at once, I had a thought
I hadn’t taken all my pills–
Pills for this and pills for these
Some for headaches and some for knees.

And oft when on the loo I sit
It’s vacant–like my pensive mood
Tries to read graffiti left,
The messages though often rude
My heart with laughter, it just kills,
And dances till the cistern fills.

Angharad
(with apologies to Wordsworth).