I've seen both kind of clen, the injectable are rarely seen.
If it's the pump, take it oraly. Usualy it 4ml/pump, 0.25mcg/ml.
If you want to cycle the clen try this:
try 1ml first week, 2ml second week. then 2 week off take some ECA or NYC for 2 weeks then take the clen, you can up the dosage of clen if side are minimal.
How to mesure the clen, use a needle without the pin, or go to a pharmacy and buy those little baby medecine seringe.
1cc=1ml