Pharmacist ‘could catch you out’ alert for anyone who takes metformin

Pharmacist ‘could catch you out’ alert for anyone who takes metformin A TikTok medical professional has warned people taking the common diabetes medicine to check before using certain everyday products People taking a widely prescribed medication may not realise that something they pick up without a prescription deserves a second thought. A pharmacist has highlighted a potential risk that can be easy to overlook, particularly when people are managing pain or buying remedies themselves. Raj Patel, known as the Straight-Talking Pharmacist on TikTok, where he has more than 100,000 followers, shared advice for people taking metformin. He said: "If you take metformin, the interaction that can catch you out the most is the painkiller you buy for yourself." Metformin is used to treat type 2 diabetes, and kidney function is important because the body removes the medicine through the kidneys. Mr Patel continued: "The main issue is your kidney function. It's because your kidneys remove metformin from your body." The pharmacist specifically highlighted anti-inflammatory painkillers, including ibuprofen and diclofenac, which are available without a prescription, adding they "can put extra strain on your kidneys, especially if you're dehydrated". NHS guidance confirms that anti-inflammatory medicines such as these, along with certain medicines for high blood pressure and diuretics, can interact with metformin or affect kidney function. That does not mean everyone taking metformin must avoid these medicines, but a pharmacist or doctor can check whether they are suitable and whether monitoring is needed. Mr Patel said: "Some water tablets and blood pressure medicines can also affect kidney function. They're often prescribed safely with metformin, but you may need monitoring." Alcohol is another consideration for people taking the diabetes medicine, particularly when drinking heavily or becoming dehydrated. "Too much alcohol can increase the risk of a rare serious condition called lactic acidosis, particularly if you're fasting, dehydrated or have a liver problem," the pharmacist noted. Lactic acidosis is a rare but serious complication that requires urgent medical attention if suspected. The NHS advises people taking metformin to seek emergency help if they think they may be experiencing it. Mr Patel urged people to check before starting anything new, including vitamins and supplements bought from a supermarket: "Before you start a new medicine, vitamin or supplement, even from the supermarket, ask your pharmacist, is this suitable with my metformin?" His final warning was not to make changes to prescribed treatment without advice. Patel urged: "Whatever you do, do not stop prescribed medicines by yourself."