Leave the medication in the brown bottle-nitroglycerine should be kept in a brown bottle (or even a special air- and water-tight, solid or plated silver or gold container) because of its instability and tendency to become less potent when exposed to air, light, or water. the supply should be replenished every 6 months, not 3 months, and one tablet should be taken every 5 minutes until pain subsides, so answers replenishing his supply every 3 months and taking one every 15 minutes if pain occurs are incorrect. if the pain does not subside, the client should report to the emergency room. the medication should be taken sublingually and should not be crushed.