Taking felodipine with other medicines and herbal supplements

Cautions with other medicines

If you take other medicines that lower blood pressure with felodipine, the combination can sometimes lower your blood pressure too much. This may make you feel dizzy or faint. If this keeps happening to you, tell your doctor as your dose may need to be changed.

Some medicines can affect the way felodipine works.

Tell your doctor if you're taking any of these medicines before starting felodipine:

• anti-epilepsy medicines such as carbamazepine, phenytoin, phenobarbital (phenobarbitone) or primidone
• antibiotics such as clarithromycin, erythromycin or rifampicin
• itraconazole, an antifungal
• medicines for HIV or hepatitis C virus
• medicines to reduce immune reactions such as ciclosporin or tacrolimus

Mixing felodipine with herbal remedies or supplements

St John's wort, a herbal remedy taken for depression, is thought to affect the way felodipine works. Talk to your doctor if you're thinking about taking St John's wort.

There's not enough information to say that other herbal remedies and complementary medicines are safe to take with felodipine. They're not tested in the same way as pharmacy and prescription medicines. They're generally not tested for the effect they have on other medicines.