"i was diagnosed with graves/hyperthyroidism in feb 2014, i was given 1 mg of lorazepam on one of my trips to the er because of my hyperthyroidism. this medication is the best in it&#039;s class, i also occasionally take propranolol 10mg for heart palpitations, they both work perfect together. already had rai 4 weeks ago but am having bouts of hyper till thyroid is completely off. the 0.5 mg doesn&#039;t do much but the 1 mg is excellent."