Is cytomel safe to take? i don't feel synthroid (thyroxine) is enough because i still feel bad

Go to your doctor: Cytomel (liothyronine) is mainly for supplementation of your t3, which is way more potent than your T4 and is the end product of your t4. Be careful in taking medicines that your doctor has not prescribed as if you cause hyperthyroidism, your heart status can also suffer. It is best to have your level checked and medicine adjusted.