From what I understand about taking the synthroid or levothyroxine it takes a couple months to regulate itself. Once you begin taking it, the doc should order follow up blood tests to determine if the level is correct. If not, the medication gets adjusted and then a 2-3 more months for another blood test to check the levels. Having your thyroid levels "off" can cause all kinds of other problems so its important to get the correct level of medication and requires constant monitoring every few months.

I started taking levothyroxine a few years after rads (guessing about 2010). I started out at 50 mcg. After 2 years it went up to 75 mcg and now its at 88mcg.


Christine
SCC 6/15/07 L chk & by L molar both Stag I, age44
2x cispltn-35 IMRT end 9/27/07
-65 lbs in 2 mo, no caregvr
Clear PET 1/08
4/4/08 recur L chk Stag I
surg 4/16/08 clr marg
215 HBO dives
3/09 teeth out, trismus
7/2/09 recur, Stg IV
8/24/09 trach, ND, mandiblctmy
3wks medicly inducd coma
2 mo xtended hospital stay, ICU & burn unit
PICC line IV antibx 8 mo
10/4/10, 2/14/11 reconst surg
OC 3x in 3 years
very happy to be alive smile