Bisphosphonates are drugs that help prevent or slow down bone thinning (osteoporosis). They can help to treat some types of cancer that cause bone damage.
Doctors also use a drug called denosumab as a bone targeted treatment. It’s a type of targeted therapy called a monoclonal antibody.
Bisphosphonates don’t usually cause too many side effects. They tend to be mild if you do have them. Everyone reacts differently to drugs and you may have one or more side effects.
Fever and flu-like symptoms
This is more common when you have the bisphosphonate as a drip (infusion) rather than bisphosphonate tablets. Symptoms usually last for a few hours. Taking painkillers like paracetamol can help.
Talk to your doctor or advice line if you have a fever or flu-like symptoms.
Low levels of calcium in your blood (hypocalcaemia)
You will have blood tests to check the levels of calcium and other minerals such as potassium and magnesium.
Bone and joint pain
Some people find they have a temporary increase in their bone or joint pain. You can control this with a mild painkiller such as paracetamol. Talk to your doctor if this doesn’t improve after a few days.
Changes in bowel movements
Constipation or diarrhoea usually lasts only for a few days. It is important to drink plenty of fluids (6 to 8 glasses a day).
Tiredness and low energy levels
These may occur with some types of bisphosphonates but are usually mild.
This is usually mild and gets better after a few days. Your doctor or nurse can prescribe anti sickness tablets if it continues or is severe.
Changes to your kidneys
You'll have regular blood tests to check how well your kidneys are working.
Irritation of the food pipe (oesophagus)
This can be a side effect of taking bisphosphonate tablets. Tell your doctor if you already have problems with your food pipe (oesophagus) or if you develop new symptoms such as pain or difficulty swallowing.
Take your tablets according to the instructions your doctor or pharmacist gives you. You might be advised to take your tablets on an empty stomach. Or to take your tablets while standing or sitting upright. This is to try and prevent irritation of your food pipe.
Let your doctor know if you have a burning sensation in your lower chest (heartburn).
Osteonecrosis (pronounced oss-tee-oh-neh-kro-sis) means death of bone tissue. Osteonecrosis of the jaw bone can occasionally happen when taking bisphosphonates. The exact causes are not known.
You should have a dental check up before you start treatment. Always tell your dentist that you’re having bisphosphonate therapy or tell your cancer specialist if you need dental treatment.
It is important to keep your mouth clean. Talk to your doctor about any mouth problems during treatment.
When you're taking bisphosphonate tablets or capsules, you should follow the instructions your doctor or pharmacist gives you.
Food and drink
Take the tablets or capsules on an empty stomach, or they won't be absorbed well. Some people find it easiest to take them first thing in the morning and wait at least an hour before eating anything or having any milk.
Drink plenty of fluids to help protect your kidneys. Ask your doctor or nurse about how much they recommend you drink each day.
Bisphosphonates can interact with other drugs you are taking. This includes some painkillers such as non steroidal anti inflammatory drugs (NSAIDs) and antibiotics. Check with your doctor or pharmacist before taking any new medicines.
As bisphosphonates can lower the level of calcium in the blood, your doctor might prescribe you daily calcium and vitamin D supplements. This is only if your calcium level isn’t too high. Vitamin D helps the body absorb calcium.
Pregnancy and Contraception
This treatment might harm a baby developing in the womb. It is important not to become pregnant or father a child while you're having treatment. Talk to your doctor or nurse about effective contraception before starting treatment.
Find your drug on our cancer drug A-Z list to get more information, including side effects.
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