Hi Dandelion:
You didn't say how long you have been on the spiro and the dosages, but spiro and propecia can both affect your libido somewhat.
The spiro acts as an anti-androgen, even though it was designed originally as a hypertensive medication. The bottom line is it reduces your testosterone level, which prevents that from converting to DHT or dehydrotestosterone.
DHT can cause hair growth on the face and body and loss on the scalp.
If you really want to find out what is happening internally you need to have blood tests done for testosterone level and potassium level. It is also important to avoid potassium supplements and drink lots of water. In case you are wondering, even women have testosterone although their levels are uually lower than for men.
Alicia