Like all medicines, this medicine can cause side effects, although not everybody gets them.
Olmesartan medoxomil/hydrochlorothiazide is a combination of two active substances and the following information firstly gives the other side effects reported so far with the combination Olmesartan medoxomil/hydrochlorothiazide (besides those already mentioned above) and, secondly, those which are known about for the separate active substances.
If these side effects occur, they are often mild and you do not need to stop your treatment.
Common side effects (may affect up to 1 in 10 people):
Dizziness, weakness, headache, tiredness, chest pain, swelling of ankles, feet, legs, hands or arms.
Uncommon side effects (may affect up to 1 in 100 people):
Fluttering of the heartbeat (palpitations), rash, eczema, vertigo, cough, indigestion, abdominal pain, nausea, vomiting, diarrhoea, muscle cramps and muscular pain, pain in joints, arms and legs, back pain, erection difficulties in men, blood in urine.
Some changes in blood test results have also been seen uncommonly and include:
Rise in blood fat levels, rise in blood urea or uric acid, rise in creatinine, rise or decrease in blood potassium levels, rise in blood calcium levels, rise in blood sugar, increase in levels of liver function. Your doctor will know about these from a blood test and will tell you if you need to do anything.
Rare side effects (may affect up to 1 in 1,000 people):
Feeling unwell, disturbances in consciousness, skin lumps (wheals), acute kidney failure.
Some changes in blood test results have also been seen in rare cases and include:
Rise in blood urea nitrogen, decrease in haemoglobin and haematocrit values. Your doctor will know about these from a blood test and will tell you if you need to do anything.
Olmesartan medoxomil:
Common side effects (may affect up to 1 in 10 people):
Bronchitis, cough, runny or stuffy nose, sore throat, abdominal pain, indigestion, diarrhoea, nausea, gastroenteritis, pain in the joints or bones, back pain, blood in urine, urinary tract infection, flu-like symptoms, pain.
Some changes in blood test results have also been seen commonly and include:
Rise in blood fat levels, rise in blood urea or uric acid, increase in levels of liver and muscle function.
Uncommon side effects (may affect up to 1 in 100 people):
Quick allergic reactions that may affect the whole body and may cause breathing problems as well as a rapid fall of blood pressure that may even lead to fainting (anaphylactic reactions), swelling of the face, angina (pain or uncomfortable feeling in the chest; known as angina pectoris), feeling unwell, allergic skin rash, itching, exanthema (skin eruption), skin lumps (wheals).
Some changes in blood test results have also been seen uncommonly and include: Reduced numbers of a type of blood cell, known as platelets (thrombocytopenia).
Rare side effects (may affect up to 1 in 1,000 people):
Impaired kidney function, lack of energy.
Some changes in blood test results have also been seen rarely and include: Increase in blood potassium.
Intestinal angioedema: a swelling in the gut presenting with symptoms like abdominal pain, nausea, vomiting and diarrhea.
Hydrochlorothiazide:
Very common side effects (may affect more than 1 in 10 people):
Changes in blood results including: Increase in blood fat and uric acid levels.
Common side effects (may affect up to 1 in 10 people):
Feeling confused, abdominal pain, stomach upset, bloated feeling, diarrhoea, nausea, vomiting, constipation, excretion of glucose into the urine.
Some changes in blood results have also been seen and include:
Increase in blood creatinine, urea, calcium and sugar levels, decrease in blood chloride, potassium, magnesium and sodium levels. Increase of serum amylase (hyperamylasaemia).
Uncommon side effects (may affect up to 1 in 100 people):
Decreased or loss of appetite, severe difficulty breathing, anaphylactic skin reactions (hypersensitivity reactions), worsening of pre-existing myopia erythema, skin reactions to light, itching, purplish spots or patches on the skin due to small haemorrhages (purpura), skin lumps (wheals).
Rare side effects (may affect up to 1 in 1,000 people):
Swollen and sore salivary glands, decreased number of white blood cells, decreased number of blood platelets, anaemia, bone marrow damage, restlessness, feeling ‘down’ or depressed, problems sleeping, feeling un-interested (apathy), tingling and numbness, fits (convulsions), objects you look at appearing yellow, blurred vision, dry eyes, irregular heartbeat, inflammation of the blood vessels, blood clots (thrombosis or embolism), inflammation of the lung, fluid accumulation in the lungs, inflammation of the pancreas, jaundice, infection in the gall bladder, symptoms of lupus erythematosus (such as rash, joint pains and cold hands and fingers), allergic skin reactions, peeling and blistering of the skin, non infectious inflammation of the kidney (interstitial nephritis), fever, muscle weakness (sometimes causing impaired movement).
Very rare side effects (may affect up to 1 in 10,000 people):
Electrolyte disturbance leading to an abnormally depleted level of chloride in the blood (hypochloraemic alkalosis), blockage in the gut (paralytic ileus).
Acute respiratory distress (signs include severe shortness of breath, fever, weakness, and confusion).
Not known (frequency cannot be estimated from the available data):
Decrease in vision or eye pain (possible signs of fluid accumulation in the vascular layer of the eye (choroidal effusion) or acute angle-closure glaucoma).
Skin and lip cancer (Non-melanoma skin cancer).