Can the medication levothyroxine affect a pregnancy test?

I've been taking levothyroxine for hypothyroidism my whole life and though I've never been pregnant, I've never read anything or been told by my doctor that the medication would affect a pregnancy test.

i see no reason why it would affect a pregnancy test because levothyroxine is synthetic replacement of thyroid hormones that would otherwise already be in your body if your thyroid gland was working properly. pregnancy tests are testing for a specific pregnancy hormone and shouldn't be affected by levothyroxine.