Drospirenone is 8 to 10 times more potent as an antimineralocorticoid relative to spironolactone (3 mg drospirenone is equivalent to about 20–25 mg spironolactone in this regard  ).   It is more potent as an antiandrogen relative to spironolactone also but is less potent relative to cyproterone acetate , having about one-third the potency of this drug.   Progestogenic, antimineralocorticoid, and mild antiandrogenic effects have been observed in humans during treatment with drospirenone at a dosage range of to 4 mg per day orally. 
On the black market, Primobolan ® is in high demand and therefore is made readily available. Virtually all forms of this injectable steroid will be packaged in 1 ml glass ampules, with each containing 100mg of the drug in Europe and 50mg in Mexico (Germany also produces a 1 ml redi-ject). Inside the ., the 50mg ampules from Mexico and 100mg ampules from Spain and Greece most commonly show up. The attraction is no doubt the price, as Primobolan ® is not an extremely cheap product. A single 100mg ampule will generally sell for around $15 to 20 in the United States. T he 50mg ampule is usually a bit cheaper, perhaps $10 on average. Of course this is probably not as cost effective, and in worse cases this preparation will sell for about the same price as the 100mg version.