Tradução de "It drains me''

Good afternoon guys!
I was watching a TV Show a few minutes ago and I saw the following expression: "It drains me". She was an old british lady saying that she can't wear lilac dresses because "it drains her". May someone explain me this? I've got intrigued because I haven't found any similar uses on the web.
Thank you so much! Forgive my grammar mistakes, please.
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Perhaps by that she meant "it depresses me". Or perhaps it depresses her in the sense that she feels like crap.