📌 Save This Amlodipine Cheat Sheet Before Exams

Pharmacy
1

:pill: Amlodipine is a Dihydropyridine Calcium Channel Blocker (DHP-CCB) primarily used in hypertension and angina. A must-know drug for GPAT / NIPER / Pharma exams.

━━━━━━━━━━━━━━

:microscope: Mechanism of Action (MOA)

Blocks L-type calcium channels in vascular smooth muscle.

:right_arrow: Causes arteriolar vasodilation

:right_arrow: Decreases peripheral vascular resistance (afterload)

:right_arrow: Lowers blood pressure

:right_arrow: Reduces myocardial oxygen demand / cardiac workload

:pushpin: Predominantly vascular selective with minimal effect on AV nodal conduction.

━━━━━━━━━━━━━━

:stethoscope: Main Uses

:white_check_mark: Essential Hypertension

:white_check_mark: Chronic Stable Angina

:white_check_mark: Vasospastic (Prinzmetal) Angina

:white_check_mark: Coronary Artery Disease (CAD) with coexisting hypertension

━━━━━━━━━━━━━━

:warning: Adverse Effects (AMLO)

:foot: A – Ankle / Peripheral edema (most common)

:heart: M – Mild palpitations or minimal reflex tachycardia

:face_with_head_bandage: L – Lightheadedness, flushing, headache

:tooth: O – Overgrowth of gums (gingival hyperplasia)

:plus: Other possible ADRs: fatigue, dizziness, nausea

━━━━━━━━━━━━━━

:counterclockwise_arrows_button: Drug Interactions

:up_arrow: Increase amlodipine levels:

• Grapefruit juice

• Macrolides (e.g., erythromycin, clarithromycin)

• Azole antifungals

:down_arrow: Reduce effect:

• Rifampicin

• St. John’s Wort

:warning: With Simvastatin: Increased myopathy risk

Recommended to limit simvastatin dose when co-administered.

━━━━━━━━━━━━━━

:prohibited: Contraindications / Caution

:cross_mark: Severe hypotension

:cross_mark: Cardiogenic shock

:cross_mark: Significant aortic stenosis (use caution)

:warning: Hepatic impairment → lower initial dose may be required

━━━━━━━━━━━━━━

:bullseye: Exam Pearls

:star: DHP-CCBs are vascular selective

:star: Long half-life (30–50 hrs) → once-daily dosing

:star: Edema occurs due to precapillary arteriolar dilation, not sodium/water retention

:star: Edema may improve when combined with ACE inhibitors / ARBs

:star: Good choice when HTN + Angina coexist

:star: Causes less reflex tachycardia than short-acting Nifedipine

━━━━━━━━━━━━━━

:pushpin: Quick Recall Table
Topic Answer
Class DHP-CCB
Uses HTN, Angina
MOA Blocks L-type Ca²⁺ channels
Metabolism CYP3A4

━━━━━━━━━━━━━━

Which adverse effect of Amlodipine is considered the most common and exam-favorite? :thinking:

11 Likes
2

I guess peripheral edema (ankle swelling)

3

Ankle edema

4

Ankle edema (swelling in ankles and feet).

5

Peripheral Edema of course but in dental , it causes gingival enlargement.

6

peripheral edema is the most common adverse effect of amlodipine

7

I guess palpitations or ankle swelling and oedema.

What about it’s use in pregnancy and lactation?

8

Amlodipine commonly causes ankle swelling due to fluid accumulation, so monitoring and balancing treatment is important.

9

Swelling of Ankles

10

Also remember just because Amlo is almost always given stat in hypertension we forget how its not always the first choice for reproductive age group women having higher blood pressure levels. So what do we give instead?

1 Like
11

This was a complete refresher :slightly_smiling_face: :+1:

The most common side effect of Amlodipine is ankle edema.

1 Like
13

Thank you !

14

Good point

In pregnancy, amlodipine is not first-line—we prefer labetalol or extended-release nifedipine due to stronger safety evidence.

Available data on amlodipine is reassuring but still limited.

In lactation, amlodipine is generally considered safe (minimal transfer into breast milk).

1 Like
15

valid point

In reproductive-age women , we generally prefer labetalol or extended-release nifedipine over amlodipine due to better-established safety in pregnancy.

Amlodipine can be used if needed, but it’s not first-line in this group.

16

Informative post!
Ankle/ peripheral edema.

1 Like
17

Informative and explained very nicely!

1 Like
18

Thank you !