Could Over Dosage Of Dilosyn To An Infant Be A Matter Of Concern?

My husband has just given our 7month old 3-5 ml (he didn t measure it) of Dilosyn syrup by mistake instead of her calcium syrup, Macalvit. Her prescribed dosage of Dilosyn is 0.7 to 1ml. And of course she doesnt have a cold right now so doesn t need any. What should I do to help negate any effects of over dosing? Or should I just let her sleep it off?