Some BBers will use t3 which is a thyroid medication for weight loss - but also remember that it metabolizes everything - fat & muscle. Not recommended for "weight loss". T4 (synthroid) is another type of thyroid medication but doens't give real weightloss results like t3 - and I'm not saying t3 is a "weight loss drug" - just that t4 isn't as "strong" as t3 -- both are used for thyroid medicaion under a doctor's supervision.
Before I would say anything about supplementing w/ controlled substances (really self-medicating) would say get your diet & training in order.