Key takeaways
Felodipine ER (Plendil) and isradipine (Dynacirc) are both calcium channel blockers used to treat high blood pressure. Felodipine ER is typically taken once daily as a tablet, while isradipine is usually taken twice daily as a capsule. Felodipine ER is available as a lower-cost generic, but the brand name Plendil has been discontinued. Similarly, the brand name Dynacirc for isradipine is no longer available, but the generic form is still on the market. Common side effects for both medications include swelling, headache, and dizziness. Both medications can be taken with or without food, but it's important to be consistent with how you take it. Both medications require careful monitoring of blood pressure and have specific instructions regarding missed doses and potential interactions with other medications.
