A home care client takes isosorbide dinitrate 80 mg PO daily. The medication container is labeled, 40 mg per capsule and the practical nurse (PN) counts 4 remaining capsules. The PN should advise the client that there are sufficient capsules remaining for how many days? (Enter numeric value only. If rounding is required, round to the nearest whole number.)

Calculate the total milligrams (mg) remaining in the container. Available dosage = 40 mg per capsule Number of capsules remaining = 4 capsules Total mg remaining = 4 capsules × 40 mg/capsule = 160 mg. Prescribed dose = 80 mg PO daily. Calculate the number of days the remaining medication will last. Days supply = (Total mg remaining / Daily dose (mg/day)) = (160 mg / 80 mg/day) = 2 days.