I have started taking 10 mg T3 split into two doses, in addition to levo (50/75 on alternative days). The endo suggested I take the T3 12 hours apart, morning and evening. But I notice some people take the second dose in the afternoon, and some late morning. Someone else suggested taking it last thing at night. What is the reason for different timing of second dose? I do feel conscious of my heartbeat at night in bed and wondered if I was taking the second dose too late. Or perhaps I just need to get used to it again.