Spanking is intramuscular injection, and intravenous drip is intravenous injection.
These are two different ways of taking medicine.
Generally speaking, intravenous injection has the fastest effect and can directly act on the affected area (medical target tissue or target organ).
But this is also the most dangerous, so pay attention to the dose.
Spank. You said you were afraid of hitting the sciatic nerve. . . . This.
The sciatic nerve is not in that position. He hit the gluteus maximus, not the muscle, not like you said.
The effect of intramuscular injection is also faster than oral administration.
Small people usually spank, or shoulder.
When you are vaccinated, you can't take a drip with such a little medicine.