That's right Stellajane, it is in a red and white box in a toothpaste type tube and it's called Oestraclin and it costs about €4.00. Don't forget, it doesn't have a pump mechanism, you have to use the white slide that comes with it and half a slide is one pump and a whole slide is two pumps. It is exactly the same as the UK branded Oestrogel.
YOU DON'T NEED A PRESCRIPTION, you can buy it over the counter in any Spanish pharmacy but they usually only have one tube in stock so you need to order it but they normally get delivery the next day. I always order about 6 tubes at a time. You can also do this with Utrogestan but it's hard to get very enthusiastic about that stuff!
The Spanish pharmaceutical business is going to wonder what's hit it!