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Thyroid Disorders Message Board

Do You take your medicine before a test

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Old 09-07-2003, 05:00 AM   #1
Join Date: Apr 2002
Location: rutherfordton Nc
Posts: 54
skylan HB User
Post Do You take your medicine before a test

My husband is hypothyroid, and my question is does he take his thyroid medicine in the morning before he goes in for a thyroid test?

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Old 09-07-2003, 05:28 AM   #2
Join Date: Aug 2003
Location: Missouri
Posts: 236
Sky_Eagle1 HB User

In my belief, generally no, since the thyroid med will cause a spike in your levels right after you take it and they'll read the spike and not what is left from the previous day (i.e. how much is left?). The doctors don't say too much about this either, usually, so that's been the generally accepted rule as far as when patients talk about it.

I noticed at least as far as TSH goes a 2-3 pt difference depending on whether you take it BEFORE you get tested or AFTER you get tested. I usually go in the morning to get tested anyway, so I neglect taking the thyroid stuff until AFTER I get tested.

Old 09-07-2003, 04:14 PM   #3
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Join Date: Aug 2001
Location: Euless, TX
Posts: 1,635
Meep HB UserMeep HB UserMeep HB User

Actually TSH is probably not affected by taking the med. If your Doc is measuring T4, thne there will be a spike in Free T4 caused by the meds that lasts for several hours after you take the pill.

My advice is wait 'til after the blood is drawn or wait 8 hours to have your blood drawn.

I am not a doctor, nor have I ever played one on TV...

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