Today I got an alert about the latest edition of the BNF including significant changes from previous editions. Surprisingly it had this in the actual alert email:
BNF & BNFC update
To maximise absorption, levothyroxine sodium should preferably be taken at least 30 minutes before food, caffeine-containing drinks (e.g. tea, coffee), and other medication. For further details see levothyroxine sodium. Drug interactions for levothyroxine may be found in Appendix 1.
(BNFC is BNF for Children.)
So, all these years after various research has pointed out interactions between levothyroxine and what seems like almost anything you could consume (slight exaggeration maybe, but it feels like that), finally BNF starts to catch up. I for one do not believe that half an hour is sufficient gap but it is better than there being nothing! Might be enough for black coffee, but suspect it would not be long enough for many other foods and drinks.
Let alone supplements and other medicines.