Frankly speaking, I hardly fall sick, and besides I can't even remember the last time I fall sick. And so, the use of drug or injection for the treatment of sickness doesn't really resonate with my being. But if I am to choose between injection and drug, I would definitely opt for either of them because I am not afraid of any of them.
But when it comes use of any drugs I am always apprehensive of their chemical compositions because this days, we have so many counterfeited drugs out there, which makes them to be unhealthy for consumption. And I don't think we can say that about injection. I also learnt that injection are more portent in terms of bioavailability to that of drugs.
For these reasons, I would prefer the use of injection to that of drugs. Although they could be some level of risks in administering of injection, especially if done by quakes.