of medication used in heart conditions
following information gives a brief overview of the common classes of medicines
prescribed for patients with heart conditions
Medicines for 'blood thinning':
acts to reduce the 'stickiness' of platelets which are cells in the blood that
can cause clots. It is commonly prescribed for patients who have angina, heart
attacks, strokes, peripheral arterial disease and following bypass surgery or
coronary artery stenting. Aspirin may cause indigestion, nausea, vomiting or less
commonly stomach bleeding or ulceration. It may be necessary to prescribe a medication
to protect your stomach from the effects of aspirin.
may be used as an alternative if patients are intolerant of aspirin but the side
effects may be similar. It is used in patients who are truly allergic to aspirin
(rash, wheeze, swelling of the lips/tongue).
use of aspirin & clopidogrel
use of aspirin and clopidogrel
A combination of aspirin and clopidogrel will
be prescribed for some patients who have had a heart attack and for all patients
following coronary artery stenting (to reduce the risk of clot formation in the
stent.) For patients who have:
1. a bare metal stent this
will be for at least one month
2. a drug eluting stent this
will be for at least six months.
It is important
that this combined treatment is not stopped too early. Prior to discharge from
hospital your consultant team will inform you of the required duration of combined
therapy and issue you with a clopidogrel information card detailing this information.
Please show this card to other members of the healthcare team looking after you.
is given if long term prevention of clotting is needed for example in patients
with an artificial heart valve or an irregular heart rhythm (atrial fibrillation).
Regular blood tests are required to control
the dosage. Prior to discharge from hospital you will be told the dose of warfarin
to take until your next blood tests and the time and date for your blood test
(this is usually within 4 days of hospital discharge). If you are not sure when
your blood test is due please contact the ward you were discharged from for further
In addition patients should
- Tell any doctor that they see that they are taking warfarin
their dentist that they are taking warfarin
with the pharmacist before buying any over the counter medicines, vitamin supplements
or herbal remedies
- Urgently inform
their doctor or anticoagulation clinic if they develop signs of abnormal bruising
or bleeding (e.g. blood in the urine, blood in the motions or motions becoming
dark/tarry, heavy nosebleeds, spontaneous bruising)
excessive alcohol or binge drinking
cranberry juice or cranberry products
aspirin (unless prescribed by doctor in addition to warfarin) and anti-inflammatory
medicines - e.g. ibuprofen, diclofenac
their intake of green vegetables
are advised to carry on their person information relating to their warfarin.
New oral anticoagulants – alternatives to warfarin.
More recently four new anticoagulants have become available: apixaban, rivaroxaban, dabigatran and edoxaban. These medicines are available as an alternative choice for many patients where warfarin had previously been the only option.
These medicines have been shown in large clinical trials to be as effective as warfarin but probably cause slightly less bleeding side-effects.
An important exception to the use of these new medicines is for patients with a mechanical heart valve where warfarin remains the treatment of choice.
An advantage of these new medicines is the ease of dosing. Once the initial dose has been selected (which will depend on factors such as your age, body weight, kidney function and the other medicines you are taking) there is no need for regular blood tests for dose adjustment.
The cautions listed above for warfarin still apply (except the dietary restrictions) with these new medicines.
Combination of antiplatlet and anticoagulation - sometimes we will recommend a combination of antiplatelet medicines and anticoagulation. If you do not know how long you are to take this combined treatment please check with us when you come for your follow-up or ask your GP to clarify this with your consultant.
blockers reduce the action of adrenaline and stop the heart from beating as fast.
They are a common class of cardiac medication used for the management of angina,
after a heart attack, for heart failure, for some rhythm disturbances and for
the management of high blood pressure. The generic names are similar and all end
olol. Examples are atenolol, bisoprolol, metoprolol and carvedilol.
side effects include tiredness, fatigue, cold hands and feet and impotence.
patients with asthma/wheezing beta blockers should be avoided as they may worsen
the breathing. When used in heart failure beta-blockers are started at a very
low dosage which will need to be built up gradually.
If you feel you have any
side effects with your beta-blocker please consult your doctor as they should
not be stopped abruptly.
reducing the effect of the 'hormone' angiotensin these medicines help the arteries
in the heart to relax and widen. They are used for the management of high blood
pressure and also to treat and prevent heart failure. The generic names are similar
and all end in
.pril. Examples are ramipril, perindopril, lisinopril.
The most common side effect described
with ACE inhibitors is a dry cough, which tends to be worse at night and unresponsive
to cough remedies. If you develop this side-effect please discuss this with your
Before starting on these medicines and/or a few days after any dosage
increase a you will have your blood pressure monitored and a blood test is required
to check the function of the kidney.
II receptor antagonists are similar in action to ACE inhibitors and may be used
as an alternative - particularly in cases where the ACE inhibitor is not tolerated
due to the side-effect of cough. Again the generic names are similar and all end
.sartan. Examples include candesartan,irbesartan, and losartan.
exert their effects by dilating (opening up) the blood vessels that supply the
heart and thus reduce the symptoms of angina. They can be used to:
immediate relief of symptoms: sublingual nitrates which are in the form of tables
or sprays under the tongue.
2. Prevent symptoms of angina: tablets or patches
that are applied to the skin or use of sublingual preparations in advance of an
How to use glyceryl trinitrate
(GTN) sublingual tablets or spray
people who have angina always carry their GTN with them. The dose is taken under
your tongue 'as required' when a pain develops. GTN is absorbed quickly into the
bloodstream from under the tongue. A dose works to ease the pain within two-three
minutes. If the first dose does not work, take a second dose after five minutes.
(If the pain persists for 10-15 minutes despite taking GTN, then call an ambulance.)
tablets 'go off' after a few weeks. Until the container has been opened this is
not a problem however once the container has been opened a fresh supply of tablets
is needed after 8 weeks. GTN spray which has a much longer shelf life (lasts until
the expiry date printed on the container)
Common side-effects associated with
GTN are headaches, facial flushing and light-headedness/dizziness.
known as calcium antagonists these medicines may be split into three types: verapamil, diltiazem and the dihydropyridines (which all end in
.pine: examples are amlodipine and nifedipine,
They medicines are used for the management of high blood pressure, angina and
to slow the heart rate down (verapamil and diltiazem only). Other medications
used for angina are nicorandil and ivabradine.
known as water tablets these medicines help the body to remove water. Water tablets
may be useful to reduce blood pressure or in the treatment of heart failure to
prevent the build up of fluid in the lungs or in the tissues which may lead to
swollen ankles/legs or a swollen stomach. If fluid builds up in the lungs this
may lead to shortness of breath on exertion or at rest, difficulty lying flat
to sleep (or needing extra pillows) or night time waking with breathlessness.
In addition build up of fluid may result in an increase in body weight.
classes of water tablets are known as: Thiazides (e.g. bendroflumethiazide),
Loop diuretics (e.g. furosemide, bumetanide),
Aldosterone antagonists (e.g. spironolactone)
well as removing water diuretics may also remove salts from the body. You should
reduce the amount of salt in your diet, including avoiding adding salt to your
food (www.bhf.org.uk/publications.aspx?sPage=2 ).
When taking diuretics you
may need to have a blood test to check the level of salts (in particular potassium)
or the function of your kidney. Your doctor will advise you on when these tests
lowering medicines (statins)
most commonly prescribed medicines for lowering the cholesterol are known as the
statins (e.g. simvastatin, atorvastatin)
which work by blocking the production of cholesterol by the liver. Medication
should not be considered as an alternative to adopting a healthy heart diet!!
current school of thought is that, regardless of the cholesterol level, statins
should be prescribed for all patients who have:
a heart attack
an angioplasty or stenting procedure
a bypass operation (CABG)
- peripheral vascular
- had a stroke or transient
ischemia attack (TIA)
- who have
type 2 diabetes (commonly referred to as maturity onset diabetes)
these patient groups the target cholesterol levels are a total cholesterol of
? 4 mmol/l and LDL cholesterol of ? 2 mmol/l and an HDL level of ? 1mmol/l.
people who take a statin have no side-effects, or only minor ones. These include:
headache, pins and needles, abdominal pain, bloating, diarrhoea, feeling sick,
and a rash. However, you should tell your doctor if you have any unexpected muscle
pains, tenderness or weakness. This is because a rare side-effect of statins is
a severe form of muscle inflammation.
Patients who are prescribed simvastatin
should avoid grapefruit juice as a substance in this fruit juice leads to high
levels of simvastatin in the blood stream - making the side effects on the muscle
more likely. This effect occurs to a lesser extent with atorvastatin (intake of
grapefruit juice should be kept low) but not with the other drugs in this class
cholesterol lowering medicines may be used as an alterative to statins, or in
addition to statins of cholesterol targets cannot be attained by a statin alone.
These are most commonly either a fibrate (e.g. fenofibrate)
oils may be used as part of a lipid lowering regime or may be used to supplement
dietary intake in patients who have had a heart attack. The particular type of
fish oils recommended are known as omega-3 fatty acids and are contained oily
fish such as mackerel and sardines. Your doctor may prescribe this as Macron®
Medicines for rhythm
classes of medicines for rhythm disturbances are beta blockers (see peviously),
digoxin and amiodarone.
is commonly used for the reducing the heart rate in atrial fibrillation (AF).
As a result the heart rate will be slowed and the symptoms of AF for example breathlessness,
palpitations or chest pain will be reduced.
Side effects include loss of
appetite, nausea, confusion, and visual disturbances.
is very effective at controlling a wide range of rhythm disturbances. However,
it does have a number of important side effects that require careful monitoring.
Amiodarone makes the skin more sensitive to sunlight - direct sunlight and
sun through glass. You should avoid exposure to too much sun and use a high factor
Small amounts of the medicine deposit in the eye. These do not generally
affect vision however we recommend that you have an eye test annually at your
optician and report any changes in your vision to your doctor.
report difficulties with night driving due to increased sensitivity to the glare
from oncoming headlights.
Before starting amiodarone your doctor should do
a blood test to check that you thyroid and liver function is alright. Once on
treatment this test should be repeated every 6 months.
You may need a chest
X-ray or tests for the function of your lungs. During treatment if you develop
shortness of breath you should consult your doctor.
you are taking warfarin and this medicine is started or stopped always inform
your doctor as you will need close monitoring for the affects on your warfarin
Other medications for rhythm disturbances
include verapamil, mexiletene, flecainide and propafenone
Ticagrelor is used for the prevention of thrombotic events (for example stroke or heart attack) in people with acute coronary syndrome or myocardial infarction.
Prasugrel is used along with aspirin to prevent serious or life-threatening problems with the heart and blood vessels in people who have had a heart attack or severe chest pain and have been treated with angioplasty (procedure to open the blood vessels that supply blood to the heart). Prasugrel is in a class of medications called anti-platelet medications. It works by preventing platelets (a type of blood cell) from collecting and forming clots that may cause a heart attack or stroke.