We’re dealing with two different drugs here.
1. Nolvadex is a SERM, which stands for Selective Estrogen Receptor Modulator. Please note the word selective here. Nolvadex specific target is the breast tissue, that’s where it works to directly block the Estrogen receptors there from receiving Estrogen and hypertrophying. Nolvadex does nothing to bring your level of Estrogen down ok. So whatever side effects you may get from an excessive amount of Estrogen floating in your blood stream, Nolvadex would have nothing to do with that, hence edema (bloating) and/or hypertension (high blood pressure) would remain there. However gynaecomastia (bitch tits) would not develop, and I think that was your main concern wasn’t it Sir!
2. Arimidex on the other hand, is an AI, that is it’s an anti-aromatase, which job is to block the aromatase enzyme that works to convert Testosterone into Estrogen. In plain English, that means Arimidex brings the whole body’s concentration of Estrogen down (no specific targeting sites here like Nolvadex remember) and prevent estrogenic side effects like bloating etc. to take place.
Now that you're armed with some facts, you may be in a better position to make an educated choice between these two drugs.
I’ll leave it here and give someone else a chance to express their views.
Fadi.