Amlodipine has a long half life so it hangs around for a while.

Here are the details:

Amlodipine has an elimination half life of 30 to 50 hours. This is the time it takes for your body to reduce the plasma levels by half.

It takes about 5.5 elimination half lives for a medicine to be out of your system. Therefore it'll take about 11.5 days (5.5 x 50 hours = 275 hours) for it to be out from your system.

Other factors to consider:

1. How much and how often you have taken the drug.
2. Your metabolic rate – a slower metabolism will increase the time a drug remains in your system.
3. Your age and health – older age and poor health will generally increase the time the drug stays in your system.
4. Body mass – generally the bigger you are the longer a drug will remain in your system.

Reference: https://www.drugs.com/pro/amlodipine.html