If you are taking this medication daily and on a regular schedule, and you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up.
If you are taking this medication every other day or are slowly reducing your dose, and you miss a dose, then contact your doctor or pharmacist right away to establish a new dosing schedule.
If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center.