Side Effects Of Diltiazem

Like all medicines, diltiazem can cause side effects, although not everyone gets them.

Common side effects

These common side effects of diltiazem happen in more than 1 in 100 people. They are usually mild and will not last long. There are things you can do to help cope with them:

Speak to a doctor or pharmacist if the advice on how to cope does not help and a side effect is still bothering you or does not go away.

Serious side effects

Serious side effects after taking diltiazem are rare and happen in less than 1 in 10,000 people.

Stop taking diltiazem and call a doctor or call 111 now if:

• you get severe pain in your stomach
• the whites of your eyes turn yellow, or your skin turns yellow although this may be less obvious on brown or black skin - this can be a sign of liver problems
• your heartbeat becomes noticeable (palpitations)

Call 999 or go to A&E now if:

Do not drive to A&E. Ask someone to drive you or call 999 and ask for an ambulance.

Bring all the medicines you take with you.

Serious allergic reaction

In rare cases, it's possible to have a serious allergic reaction (anaphylaxis) to diltiazem.

Call 999 now if:

• your lips, mouth, throat or tongue suddenly become swollen
• you're breathing very fast or struggling to breathe (you may become very wheezy or feel like you're choking or gasping for air)
• your throat feels tight or you're struggling to swallow
• your skin, tongue or lips turn blue, grey or pale (if you have black or brown skin, this may be easier to see on the palms of your hands or soles of your feet)
• you suddenly become very confused, drowsy or dizzy
• someone faints and cannot be woken up
• a child is limp, floppy or not responding like they normally do (their head may fall to the side, backwards or forwards, or they may find it difficult to lift their head or focus on your face)

You or the person who's unwell may also have a rash that's swollen, raised, itchy, blistered or peeling.

These can be signs of a serious allergic reaction and may need immediate treatment in hospital.

Other side effects

These are not all the side effects of diltiazem. For a full list, see the leaflet inside your medicine packet.

Reporting side effects

You can report any suspected side effect using the Yellow Card safety scheme.

Visit the Yellow Card website for more information about reporting side effects.

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