are hypothyroidism and hypoglycemia related ?

Hello everyone, Good afternoon :) One of my sisters is having hypothyroidism and she is taking the eltroxin twice a day. Usually docs prescribe to take only once but b'case her body was not able to be okay with once a day..some docs prescribed she can take twice..but it seems its very rare.

but what's happening is..she is still having so many hypothyroidism symptoms although taking tablets and in addition,every couple of hrs..she suddenly feels she goes in hypoglycemic stage..at that time..she immediately needs to eat something else..she feels week very very week and has body pains. Once she takes some fruitts/sweet..immediately she feels better and after couple of hrs..this continues. it seems..that no doctor is able to understand it. I feel sad listening to my sister condition and starte dto see the web and writing u all.

Since, she needs to eat often(she is increasing in weight a lot). also, its not a desire to eat but had to eat to maintain some energy. Doctors also are unable to diagnose this at all. also, someone told that this thyroid probably is unable to make the liver/gallbladder function properly which are responsible in converting food/fat to energy. but the problem is: whenever we try to mention these, the doctor asks for thyroid tests and since the thyroid tests come normal..the doctors unable to do anything.

is there any test possible in relation to thyroid test for checking the metabolism of the body ? many doctors agree that thyroid is very important for all bodily functions but again say that teh dosage of tables is okay since thyroid tests come normal. they say..they don't understand..etc etc..Its understandble..what can doctors do if the tests come normal.

anyone in this kind of situation ro any help from any other doctors there..if they have come similar situation? Thansk very much in advance.
Regards,
Bharathi