Medication and dehydration when unwell

Taking certain medicines when you are dehydrated can result in you developing a more serious illness. Any illness that causes vomiting, diarrhoea and fever (e.g. food poisoning) can cause dehydration.

The following medications should be temporarily stopped during such an illness, until 24-48 hours after you are back to eating and drinking normally:

ACE inhibitors

A type of medication for blood pressure and heart conditions. Examples: names ending in “pril” e.g. Ramipril, Enalapril, Lisinopril.  Dehydration while on these can stop your kidneys working properly.

Angiotensin-receptor blockers

A type of medication for blood pressure and heart conditions. Examples: names ending in “sartan” e.g. Losartan, Candesartan, Valsartan. Dehydration while on these can stop your kidneys working properly.

Diuretics

Also called “water tablets” for excess fluid and high blood pressure. Examples: Furosemide, Bendroflumethiazide, Spironolactone.  Dehydration while on these can stop your kidneys working properly.

SGLT2 inhibitors (Flozins)

Medicines used in diabetes, heart failure and kidney disease. They can cause further dehydration when unwell. Examples: names ending in “flozin” e.g. Dapagliflozin, Empagliflozin.

Metformin

A medicine for diabetes. Dehydration while on metformin can put you at risk of developing a condition called lactic acidosis.

Non-steroidal anti-inflammatory drugs

Commonly used painkillers. Examples: Ibuprofen, Naproxen, Diclofenac. Dehydration while on these can stop your kidneys working properly.

If you have any questions about your medication, please make an appointment with one of our medical staff.