CV Meds: Calcium Channel Blockers

Question 1

How do calcium channel blockers lower someone’s blood pressure?

Answer 1

They slow the movement of calcium into smooth-muscle cells, resulting in arterial dilation and decreased BP

Question 2

What are some examples of Ca+ channel blockers?

Answer 2

• nifedipine
• verapamil
• diltiazem
• amlodipine

Question 3

Which Ca+ channel blockers can be used for A-fib, A-flutter, or SVT?

Answer 3

Verapamil and diltiazem

Question 4

Why would someone need Ca+ channel blockers?

Answer 4

• angina
• hypertension

Question 5

What food should be avoided when taking Ca+ channel blockers?

Answer 5

Grapefruit juice - can lead to toxicity

Question 6

Ca+ channel blockers are contraindicated for what patients?

Answer 6

Those with:
- heart failure
- heart block
- bradycardia

Question 7

What other medications may interact with Ca+ channel blockers?

Answer 7

• digoxin
• beta blockers cause

Question 8

Side effects of Ca+ channel blockers:

Answer 8

• constipation
• reflex tachycardia
• peripheral edema
• toxicity

Question 9

What are 4 medication administration points to remember when giving Ca+ channel blockers?

Answer 9

1. Do not crush/chew extended release tablets
2. Administer IV injection over 2-3 minutes
3. Slowly taper dose of discontinuing med
4. Monitor HR and BP