According to his brother, although there is a picture of him at a brewery late in the 90's with a rather large glass of beer in hand.
From Telegraph News 'I'm scared my brother's health is too fragile for the papacy':
"Cardinal Ratzinger was hospitalised twice in the 1990s, once after a brain haemorrhage and later after slipping in the bath and cutting his head.
Fr Ratzinger said his 78-year-old brother had had to give up drinking beer.
He added: 'I had hoped that the not quite so stable health of my brother might have moved the cardinals to elect someone considerably younger than him.'"
And Fr. Georg adds a prophetic note:
His brother had a clear sense of his destiny early on in life, Fr Ratzinger said. As a toddler, after a cardinal's visit to his kindergarten Joseph pronounced: "Some day I will also be a cardinal."