Skip to Content

UK Edition. Click here for US version.


Active substance(s): POTASSIUM CHLORIDE

PDF options:  View Fullscreen   Download PDF

PDF Transcript

Artwork Information
Product Title:

Slow-K PIL



Label Number:

15-008, 15-009, 15-010

Fonts Used:

Helvetica Condensed

Font size (min):


Product Size:
Version 5 Colours Used:

140mm x 333mm


Slow-K® 600 mg prolonged-release tablets
potassium chloride
Read all of this leaflet carefully before you start taking this medicine because it contains important
information for you.
Always take this medicine exactly as described in this leaflet or as your doctor or pharmacist has told you.
• Keep this leaflet. You may need to read it again.
• Ask your pharmacist if you need more information or advice.
• If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in
this leaflet. See section 4.
What is in this leaflet
1. What Slow-K is and what it is used for
2. What you need to know before you take Slow-K
3. How to take Slow-K
4. Possible side effects
5. How to store Slow-K
6. Contents of the pack and other information
1. What Slow-K is and what it is used for
Slow-K belongs to a group of medicines called potassium supplements.
Slow-K contains potassium and is used to treat or prevent low levels of potassium in your body. Slow-K tablets are
prolonged-release tablets which means that the potassium is released slowly from the tablet.
Whilst on this medicine your doctor will want to measure your blood levels of potassium on a regular basis.
2. What you need to know before you take Slow-K
Do not take Slow-K:
• if you are allergic to potassium chloride or any of the other ingredients of this medicine (listed in section 6)
• if you have been told by your doctor you have kidney failure
• if you have Addison’s disease (which is a condition where your adrenal gland is not producing enough steroids)
• if you have recently suffered from severe burns
• if you suffer from digestive problems or have difficulty swallowing (due to a narrowing or blockage of your gullet
(food pipe) or intestines)
• if you have been told you have metabolic acidosis (a condition caused by increased acid levels in the blood)
• if you are dehydrated (you may feel thirsty with a dry mouth)
• if you have high blood potassium levels (which can cause an abnormal heartbeat)
• if you suffer from a condition called hyporeninaemic hypoaldosteronism (where your body is low on an enzyme
called renin and a hormone called aldosterone which normally helps to control your blood pressure)
• if you are taking certain types of diuretics (water tablets); either potassium-sparing diuretics (e.g. triamterene and
amiloride) or aldosterone antagonists (e.g. spironolactone and eplerenone).
Warnings and precautions
Talk to your doctor or pharmacist before taking Slow-K if you:
• have had an ostomy (an operation to remove part of your bowels)
• suffer from any condition which affects your bowel movements
• suffer from heart disease (which may cause chest pain, shortness of breath or ankle swelling)
• suffer from kidney problems
• have or have ever had a stomach ulcer.
Do not give Slow-K to children.
If any of the above applies to you, or if you are not sure, speak to your doctor or pharmacist before you take Slow-K.
Other medicines and Slow-K
Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines.
In particular, tell your doctor or pharmacist if you are taking:
• potassium-sparing diuretics
• aldosterone antagonists
• ACE inhibitors or
• angiotensin-II-receptor
• ciclosporin
• non steroidal antiinflammatories (NSAIDs)
• heparin
• digoxin
• anticholinergics
• direct renin inhibitors
• proton pump inhibitors

- “water tablets” for high blood pressure and certain heart diseases, e.g.
triamterene and amiloride (if you are taking potassium-sparing diuretics, stop
taking Slow-K, see the section ‘Do not take Slow-K’)
- “water tablets” for heart failure and certain liver and kidney problems, e.g.
spironolactone and eplerenone (if you are taking aldosterone antagonists,
stop taking Slow-K, see the section ‘Do not take Slow-K’)
- for high blood pressure or heart problems such as captopril or atenolol
- for treatment of high blood pressure, kidney damage due to diabetes and
congestive heart failure such as losartan or valsartan
- for transplants, rheumatic disease or skin complaints
- for pain relief or rheumatism such as aspirin or naproxen
- used to thin the blood
- for an irregular heartbeat
- for abdominal or stomach spasms or cramps such as atropine sulphate or
hyoscine butylbromide
- for high blood pressure, e.g. aliskerin
- for indigestion.

Slow-K with food and drink
You must take your tablets with fluid during a meal.
Pregnancy and breast-feeding
Your doctor will only give you Slow-K if you really need it. Slow-K is a prolonged-release tablet, which means it takes
a long time to dissolve. When you are pregnant your digestive system works more slowly and so Slow-K tablets take
longer to pass through your system. This could mean you do not receive the correct amount of potassium from your
Slow-K tablets.

Slow-K should not be taken during breast-feeding unless your doctor considers that the benefits for you are greater
than the risks to the child.
If you are pregnant or breast-feeding, think you may be pregnant or are planning to have a baby, ask your doctor or
pharmacist for advice before taking this medicine.
Slow-K contains sucrose
If you have been told by your doctor that you have an intolerance to some sugars, contact your doctor before taking
this medicinal product.
3. How to take Slow-K
Always take this medicine exactly as described in this leaflet or as your doctor has told you. Check with your doctor
or pharmacist if you are not sure.
The usual dose is 2 to 3 tablets a day. Your doctor will decide when and how to treat you with Slow-K. Your doctor
may tell you to take up to 12 tablets a day.

The tablets should not all be taken at once but spread out during the day and taken with your meals.
Take your tablets with fluid during a meal and whilst sitting upright.
Swallow them whole.
Do not break or chew them. This is important as the tablets release potassium slowly. If you chew the tablets, this
could damage the tablet and let the potassium out too quickly and this could cause stomach problems.

If you take more Slow-K than you should
If you accidentally take too many tablets, or someone else takes your medicine, you should tell your doctor at once
or contact your nearest accident and emergency department. Show any left-over medicines or the empty packet to
the doctor.
If you forget to take Slow-K
Do not worry. If you forget to take a dose, take it as soon as possible, unless it is almost time to take the next dose.
Do not take a double dose. Then go on as before.
If you have any further questions on the use of this medicine, ask your doctor or pharmacist.
4. Possible side effects
Like all medicines, this medicine can cause side effects, although not everyone gets them.
Serious side effects
If you experience any of the following side effects, contact your doctor or pharmacist IMMEDIATELY:
• signs of intestinal bleeding or ulcers such as coughing up blood (however small the amount), blood in your vomit
and black stools
• severe sickness (feeling sick or being sick)
• constipation
• swelling of the stomach
• diarrhoea
• severe stomach pains.
Other side effects:
• high blood levels of potassium (which can cause an abnormal heartbeat)
• itching and skin rashes (nettle rash).
Reporting of side effects
If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this
leaflet. You can also report side effects directly via the internet at By reporting side
effects you can help provide more information on the safety of this medicine.
5. How to store Slow-K
Keep this medicine out of the sight and reach of children.
Do not use this medicine after the expiry date which is stated on the tablet container after EXP. The expiry date
refers to the last day of that month.
Do not store above 30°C. Keep the tablet container tightly closed in order to protect from moisture.
Do not use this medicine if you notice the appearance has changed in any way.
If your doctor decides to stop your treatment, return any unused medicine to the pharmacist. Only keep it if your
doctor tells you to.
Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away
medicines you no longer use. These measures will help protect the environment.
6. Contents of the pack and other information
What Slow-K contains
The active substance is potassium chloride.
The other ingredients are cetostearyl alcohol, gelatin, magnesium stearate, acacia, titanium dioxide (E171), talc,
sucrose, red and yellow iron oxides (E172) and carnauba wax.
What Slow-K looks like and contents of the pack
Slow-K is a pale orange, round tablet. They are prolonged-release tablets with a sugar-coating.
Slow-K comes in tablet containers of 100 tablets.
Marketing Authorisation Holder and Manufacturer
The product licence holder is: Alliance Pharmaceuticals Limited, Avonbridge House, Chippenham, Wiltshire, SN15 2BB, UK.
Slow-K is manufactured by: Novartis Pharmaceuticals UK Ltd, Horsham, West Sussex, RH12 5AB, UK.
The information in this leaflet applies only to Slow-K. If you have any questions or you are not sure about anything,
ask your doctor or a pharmacist.
This leaflet was last revised in February 2015
Slow-K is a registered trademark of Novartis AG and is used under licence by Alliance Pharmaceuticals Limited.
Alliance and associated devices are registered Trademarks of Alliance Pharmaceuticals Limited.
© Alliance Pharmaceuticals Limited 2015.

+ Expand Transcript

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.