Active substance: LOSARTAN POTASSIUM

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Losartan Potassium/Hydrochlorothiazide 100 mg/12.5 mg Film-coated Tablets
(losartan potassium and hydrochlorothiazide)
Read all of this leaflet carefully before you start taking this medicine.
Keep this leaflet. You may need to read it again.
If you have any further questions, ask your doctor or pharmacist.
This medicine has been prescribed for you. Do not pass it on to others. It may harm them, even
if their symptoms are the same as yours.
If any of the side effects gets serious, or if you notice any side effects not listed in this leaflet,
please tell your doctor or pharmacist.
In this leaflet:
What Losartan Potassium/Hydrochlorothiazide is and what it is used for
Before you take Losartan Potassium/Hydrochlorothiazide
How to take Losartan Potassium/Hydrochlorothiazide
Possible side effects
How to store Losartan Potassium/Hydrochlorothiazide
Further information


Losartan Potassium/Hydrochlorothiazide is a combination of an angiotensin II receptor antagonist
(losartan) and a diuretic (hydrochlorothiazide). Angiotensin II is a substance produced by the body
which binds to receptors in blood vessels, causing them to tighten. This results in an increase in blood
pressure. Losartan prevents the binding of angiotensin II to these receptors, causing the blood vessels
to relax which in turn lowers the blood pressure. Hydrochlorothiazide works by making the kidneys
pass more water and salt. This also helps to reduce blood pressure.
Losartan/Hydrochlorothiazide is indicated for the treatment of essential hypertension (high blood


Do not take Losartan Potassium/Hydrochlorothiazide
 if you are allergic (hypersensitive) to losartan, hydrochlorothiazide or to any of the other
ingredients in this medicine
 if you are allergic (hypersensitive) to other sulfonamide-derived substances (e. g. other
thiazides, some antibacterial drugs such as co-trimoxazole, ask your doctor if you are not sure)
 if you are more than 3 months pregnant. (It is also better to avoid Losartan
Potassium/Hydrochlorothiazide in early pregnancy – see Pregnancy section)
 if you have severely impaired liver function
 if you have severely impaired kidney function or your kidneys are not producing any urine
 if you have low potassium, low sodium or high calcium levels which cannot be corrected by
 if you are suffering from gout
Take special care with Losartan Potassium/Hydrochlorothiazide
You must tell your doctor if you think you are (or might become) pregnant. Losartan
Potassium/Hydrochlorothiazide is not recommended in early pregnancy, and must not be taken if you
are more than 3 months pregnant, as it may cause serious harm to your baby if used at that stage (see
Pregnancy section).
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It is important to tell your doctor before taking Losartan Potassium/Hydrochlorothiazide
 if you have previously suffered from swelling of the face, lips, throat or tongue
 if you take diuretics (water pills)
 if you are on a salt-restricted diet
 if you have or have had severe vomiting and/or diarrhoea
 if you have heart failure
 if your liver function is impaired (see section 2 “Do not take Losartan
 if you have narrow arteries to your kidneys (renal artery stenosis) or only have one functioning
kidney, or you have recently had a kidney transplant
 if you have narrowing of the arteries (atherosclerosis), angina pectoris (chest pain due to poor
heart function)
 if you have ‘aortic or mitral valve stenosis’ (narrowing of the valves of the heart) or
‘hypertrophic cardiomyopathy’ (a disease causing thickening of heart muscle)
 if you are diabetic
 if you have had gout
 if you have or have had an allergic condition, asthma or a condition that causes joint pain, skin
rashes and fever (systemic lupus erythematodus)
 if you have high calcium or low potassium levels or you are on a low potassium diet
 if you need to have an anaesthetic (even at the dentist) or before surgery, or if you are going to
have tests to check your parathyroid function, you must tell the doctor or medical staff that
you are taking Losartan potassium and Hydrochlorothiazide tablets
 if you suffer from primary hyperaldosteronism (a syndrome associated with increased
secretion of the hormone aldesterone by the adrenal gland, caused by an abnormality within
the gland).
Taking other medicines
Please tell your doctor or pharmacist if you are taking or have recently taken any other medicines,
including medicines obtained without a prescription.
Diuretic agents such as the hydrochlorothiazide contained in Losartan Potassium/Hydrochlorothiazide
may interact with other medicines.
Preparations containing lithium should not be taken with Losartan Potassium/Hydrochlorothiazide
without close supervision by your doctor.
Special precautionary measures (e.g. blood tests) may be appropriate if you take potassium
supplements, potassium-containing salt substitutes or potassium-sparing medicines, other diuretics
(“water tablets”), some laxatives, glycyrrhian (found in liquorice), medicines for the treatment of gout,
medicines to control heart rhythm or for diabetes (oral agents or insulins).
It is also important for your doctor to know if you are taking:
 other medicines to reduce your blood pressure
 steroids
 medicines to treat cancer
 pain killers
 drugs for treatment of fungal infections
 arthritis medicines
 resins used for high cholesterol, such as colestyramine
 medicines which relax your muscles
 sleeping tablets
 opioid medicines such as morphine
 ‘pressor amines’ such as adrenaline or other drugs from the same group
 oral agents for diabetes or insulins.

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Please also inform your doctor you are taking Losartan Potassium/Hydrochlorothiazide if you will be
undergoing a radiographic procedure and will be given iodine contrast media.
Taking Losartan Potassium/Hydrochlorothiazide with food and drink
You are advised not to drink alcohol whilst taking these tablets: alcohol and Losartan
Potassium/Hydrochlorothiazide tablets may increase each other’s effects.
Dietary salt in excessive quantities may counteract the effect of Losartan
Potassium/Hydrochlorothiazide tablets.
Losartan Potassium/Hydrochlorothiazide tablets may be taken with or without food.
You must tell your doctor if you think you are (or might become) pregnant. Your doctor will normally
advise you to stop taking Losartan Potassium/Hydrochlorothiazide before you become pregnant or as
soon as you know you are pregnant and will advise you to take another medicine instead of Losartan
Potassium/Hydrochlorothiazide. Losartan Potassium/Hydrochlorothiazide is not recommended during
pregnancy, and must not be taken when more than 3 months pregnant, as it may cause serious harm to
your baby if used after the third month of pregnancy.
Tell your doctor if you are breast-feeding or about to start breast-feeding. Losartan
Potassium/Hydrochlorothiazide is not recommended for mothers who are breast-feeding, and your
doctor may choose another treatment for you if you wish to breast-feed.
Ask your doctor or pharmacist for advice before taking any medicine.
Use in children and adolescents
There is no experience with the use of Losartan Potassium/Hydrochlorothiazide in children. Therefore,
Losartan Potassium/Hydrochlorothiazide should not be given to children.
Use in elderly patients
Losartan Potassium/Hydrochlorothiazide works equally well in and is equally well tolerated by most
older and younger adult patients. Most older patients require the same dose as younger patients.
Driving and using machines
When you begin treatment with this medication, you should not perform tasks which may require
special attention (for example, driving an automobile or operating dangerous machinery) until you
know how you tolerate your medicine.
Important information about some of the ingredients of Losartan
Losartan Potassium/Hydrochlorothiazide contains lactose. If you have been told by your doctor that
you have an intolerance to some sugars, contact your doctor before taking this medicinal product.


Always take Losartan Potassium/Hydrochlorothiazide exactly as your doctor has instructed you. Your
doctor will decide on the appropriate dose of Losartan Potassium/Hydrochlorothiazide depending on
your condition and whether you are taking other medicines. It is important to continue taking Losartan
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Potassium/Hydrochlorothiazide for as long as your doctor prescribes it in order to maintain smooth
control of your blood pressure.
High Blood Pressure
The usual dose of Losartan Potassium/Hydrochlorothiazide for most patients with high blood pressure
is 1 tablet of Losartan Potassium/Hydrochlorothiazide 50 mg/12.5 mg per day to control blood
pressure over the 24-hour period. This can be increased to 2 tablets once daily of Losartan
Potassium/Hydrochlorothiazide 50 mg/12.5 mg film-coated tablets or changed to 1 tablet daily of
Losartan Potassium/Hydrochlorothiazide 100 mg/25 mg film-coated tablets (a stronger strength) per
day. The maximum daily dose is 2 tablets per day of Losartan Potassium/Hydrochlorothiazide 50
mg/12.5 mg film-coated tablets or 1 tablet daily of Losartan Potassium/Hydrochlorothiazide 100
mg/25 mg film-coated tablets.
If you take more Losartan Potassium/Hydrochlorothiazide than you should
In case of an overdose, contact your doctor immediately so that medical attention may be given
promptly. Overdose can cause a drop in blood pressure, palpitations, slow pulse, changes in blood
composition, and dehydration.
If you forget to take Losartan Potassium/Hydrochlorothiazide
Try to take Losartan Potassium/Hydrochlorothiazide daily as prescribed. However, if you miss a dose,
do not take an extra dose. Just resume your usual schedule.
If you have any further questions on the use of this product, ask your doctor or pharmacist.


Like all medicines, Losartan Potassium/Hydrochlorothiazide tablets can cause side effects, although
not everybody gets them.
If you experience the following, stop taking Losartan Potassium/Hydrochlorothiazide tablets
and tell your doctor immediately or go to the casualty department of your nearest hospital:
A severe allergic reaction (rash, itching, swelling of the face, lips, mouth or throat that may cause
difficulty in swallowing or breathing).
This is a serious but rare side effect, which affects more than 1 out of 10,000 patients but fewer than 1
out of 1,000 patients. You may need urgent medical attention or hospitalisation.
The following side effects have been reported:
Common (affects 1 to 10 users in 100):
 Cough, upper airway infection, congestion in the nose, sinusitis, sinus disorder
 Diarrhoea, abdominal pain, nausea, indigestion
 Muscle pain or cramps, leg pain, back pain
 Insomnia, headache, dizziness
 Weakness, tiredness, chest pain
 Increased potassium levels (which can cause an abnormal heart rhythm), decreased
haemoglobin levels.
Uncommon (affects 1 to 10 users in 1000):
 Anaemia, red or brownish spots on the skin (sometimes especially on the feet, legs, arms and
buttocks, with joint pain, swelling of the hands and feet and stomach pain), bruising, reduction
in white blood cells, clotting problems and bruising.
 Loss of appetite, increased uric acid levels or frank gout, increased blood sugar levels,
abnormal blood electrolyte levels.
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Anxiety, nervousness, panic disorder (recurring panic attacks), confusion, depression,
abnormal dreams, sleep disorders, sleepiness, memory impairment.
Pins and needles or similar sensations, pain in the extremities, trembling, migraine, fainting.
Blurred vision, burning or stinging in the eyes, conjunctivitis, worsening eyesight, seeing
things in yellow.
Ringing, buzzing, roaring or clicking in the ears
Low blood pressure, which may be associated with changes in posture (feeling light-headed or
weak when you stand up), angina (chest pain), abnormal heartbeat, cerebrovascular accident
(TIA, “mini-stroke”), heart attack, palpitations.
Inflammation of blood vessels, which is often associated with a skin rash or bruising.
Sore throat, breathlessness, bronchitis, pneumonia, water on the lungs (which causes difficulty
breathing), nosebleed, runny nose, congestion.
Constipation, wind, stomach upsets, stomach spasms, vomiting, dry mouth, inflammation of a
salivary gland, toothache.
Jaundice (yellowing of the eyes and skin), inflammation of the pancreas.
Hives, itching, inflammation of the skin, rash, redness of the skin, sensitivity to light, dry skin,
flushing, sweating, hair loss,
Pain in the arms, shoulders, hips, knees or other joints, joint swelling, stiffness, muscle
Frequent urination including at night, abnormal kidney function including inflammation of the
kidneys, urinary infection, sugar in the urine.
Decreased sexual appetite, impotence.
Swelling of the face, fever.

Rare (affects 1 to 10 users in 10000)
 Hepatitis (inflammation of the liver), abnormal liver function tests.
Not known

Breakdown of muscle tissue
If any of the side effects get serious, or if you notice any side effects not listed in this leaflet, please
tell your doctor.


Keep out of the reach and sight of children.
Do not use Losartan Potassium/Hydrochlorothiazide after the expiry date, which is stated on the
carton, blister and bottle after EXP. The expiry date refers to the last day of that month.
Losartan Potassium/Hydrochlorothiazide does not require any special storage conditions.
Medicines should not be disposed of via wastewater or household waste. Ask your pharmacist how to
dispose of medicines no longer required. These measures will help to protect the environment.


What Losartan Potassium/Hydrochlorothiazide film-coated tablets contain
The active substances are losartan potassium and hydrochlorothiazide.
Each tablet contains 100 mg of losartan potassium and 12.5 mg of hydrochlorothiazide.
Losartan Potassium/Hydrochlorothiazide 100 mg/12.5 mg contains the following inactive ingredients:
microcrystalline cellulose, lactose monohydrate, pregelatinized maize starch, magnesium stearate,
hydroxypropyl cellulose and titanium dioxide.
Losartan Potassium/Hydrochlorothiazide 100 mg/12.5 mg also contains: Hypromellose 6cP.
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What Losartan Potassium/Hydrochlorothiazide film-coated tablets look like and contents of the
Losartan Potassium/Hydrochlorothiazide 100 mg/12.5 mg is supplied as white to off white, oval,
biconvex film-coated tablets, debossed with ‘M’ on one side and ‘LH5’ on the other.
Losartan Potassium/Hydrochlorothiazide film-coated tablets are supplied in white, opaque
PVC/PE/PVdC blisters with aluminium foil lidding in pack sizes of 7, 10, 14, 20, 28, 30, 50, 56, 60,
84, 90, 98, 100, 112, 280 and 500 tablets, calendar pack of 28 tablets and in white, opaque HDPE
bottles with polypropylene (PP) cap in pack sizes of 100 tablets.
Not all pack sizes may be marketed.
Marketing Authorisation Holder and Manufacturer
Marketing Authorisation Holder:
Jenson Pharmaceutical Service Limited, Carradine House, 237 Regents Park Road, London, N3 3LF
Gerard Laboratories, 35/36 Baldoyle Industrial Estate, Grange Road, Dublin 13, Ireland.
Generics [UK] Ltd, Station Close, Potters Bar, Hertfordshire, EN6 1TL, United Kingdom.
Mylan Hungary Kft., H-2900, Komárom, Mylan utca 1, Hungary.
This leaflet was last revised in 01/2013

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Source: Medicines and Healthcare Products Regulatory Agency

Disclaimer: Every effort has been made to ensure that the information provided here is accurate, up-to-date and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. This information has been compiled for use by healthcare practitioners and consumers in the United States. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate that the drug or combination is safe, effective or appropriate for any given patient. If you have questions about the substances you are taking, check with your doctor, nurse or pharmacist.