Place two nitroglycerin tablets under the client's tongue and call the primary health care provider.

Put one tablet under the client's tongue and repeat every 5 minutes to a maximum of three tablets until pain has been relieved.

Have the client swallow a tablet with an 8-ounce glass of water and repeat the same medication administration again in 10 minutes.

Give the client one nitroglycerin table, placed under the client's tongue, and then administer two more tablets in 5 minutes if pain remains.