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Lack of hCG, the hormone that is detected in pregnancy tests. If you test too soon after ovulation the test will be negative, waiting a week or two will allow enough time for the hormone to be present.

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13y ago
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14y ago

Well, the way a pregnancy test works is it measures the amount of a certain hormone in your urine- the hormone is called HCG (human chorionic gonadotropin). If there is past a certain amount of it in your urine, it means you are pregnant. So any medication (if there are any) that messes up the amount of HCG in your body could affect a pregnancy test.

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14y ago

Pills such as xanex adderal and a few others can alter a pregnancy test.

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12y ago

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I am taking pain medications for a back injury as well as a medication for migraine headaches, and was wondering if this would somehow affect test results.

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13y ago

None to my knowledge, the hormone hCG is the hormone needed for a pregnancy to be viable. A false negative is an indication it is too early to test, otherwise there is no pregnancy.

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18y ago

None as far as I am aware.

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11y ago

Not sperm

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Q: What medication can cause you to have a negative pregnancy test when it is actually positive?
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Related questions

Can a positive pregnancy test turn negative?

No , but a negative test can be a false positive .


Is pregnancy a negative nitrogen balance?

No, it is positive.


Does a negative equal a positive?

No. Negative and positive are actually opposites.


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When on medication, your pregnacy test may result in false information depending on what type of medication was taken.


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Does a negative plus a positive a negative?

Actually it doesn't. Add two positive numbers, and you always get a positive result.


Can negative pregnancy test be wrong?

a negative pregnancy test can be wrong because it could have misditected, a positive pregnany can't be wrong though.


What does it mean when you have a - and a on a pregnancy test?

A positive answer on a home pregnancy test means that you are pregnant and should see a Dr. A negative answer means that you are not pregnant. If you get a negative response and feel that it is in error you should wait two days and test again or see your Dr.