1:10,000 solution means 1 g adrenaline is present in 10,000 ml of solution 1000 mg adrenalin is present in 10,000ml (as 1 g = 1000 mg) So, 1 mg adrenaline will be present in 10,000/1000*1 = 10 ml So, inject 10 ml of 1: 10,000 Adrenaline to administer 1 mg dose