A patient with angina is being discharged with a prescription for nitroglycerin sublingual tablets. Which instruction should the nurse include?

"Store the tablets in the original dark container and tightly close it after use."

"The tablets are only good for 1 week after the container is opened."

"Sublingual nitroglycerine tablets are also effective when swallowed as a whole."

"Effects of sublingual nitroglycerin begin in 5-10 minutes."