well yes, it could...
If you don't have any oestrogen related sides then there's nothing to suggest your levels are anything other than perfectly healthy. Taking chemicals to reduce your oestrogen levels when there's nothing wrong with them is just insane in my opinion.
Don't worry about getting sides, if anything you'll just start seeing what you "want" to see and will convince yourself you are getting gyno. If Gyno starts to appear then consider your options, if you catch it early there's absolutely nothing to worry about... if you are concerned you might be getting gyno then go see your Dr.
This is obviously just my opinion, but i honestly think you'd be mad to put these drugs into your system on a long term basis for no reason.