What needle size and insertion technique are recommended when reconstituting the Aurobindo Pharma - Milpharm Ltd. product Ertapenem Milpharm 1 g powder for concentrate for solution for infusion to avoid stopper coring?

When reconstituting the Aurobindo Pharma - Milpharm Ltd. product Ertapenem Milpharm 1 g, use a 21-gauge or smaller-diameter needle, inserting it vertically only at the centre of the rubber stopper to avoid coring.