With the zeal of an entrepreneur and the passion of a preacher, Chemist Warehouse chief executive and co-founder Mario Verrocchi doesn’t sound like any other ASX boss.

Which is just as well. Because the biggest question raised by the extraordinary deal, which will see Chemist Warehouse join the ASX ranks via an $8.8 billion reverse takeover of listed minnow Sigma Healthcare, is how much growth is left in the business.