The Painkillers to Use with Caution
The main group of painkillers to be wary of are non-steroidal anti-inflammatory drugs, or NSAIDs. This category includes widely used over-the-counter drugs like ibuprofen and naproxen, as well as several prescription-strength versions. While effective
for pain and inflammation, NSAIDs can cause the body to retain sodium and water, which can increase blood pressure. Studies suggest that regular NSAID use can raise systolic blood pressure by an average of 3-5 mmHg, a significant amount for someone already managing hypertension. This effect can happen even in people without a history of high blood pressure, but it is most pronounced in those with controlled hypertension.
How They Interfere with Your Medication
Beyond directly raising blood pressure, NSAIDs can also reduce the effectiveness of many common antihypertensive drugs. They work by blocking enzymes called cyclo-oxygenases (COX), which in turn reduces the production of chemicals called prostaglandins. Some prostaglandins help regulate blood flow to the kidneys. By inhibiting them, NSAIDs can affect kidney function and counteract the work of medications like ACE inhibitors, angiotensin receptor blockers (ARBs), and diuretics. This competitive interaction can make your blood pressure harder to control, potentially requiring adjustments to your treatment plan.
A Generally Safer First Choice
For people with high blood pressure, paracetamol (also known as acetaminophen) is often recommended as the first-line choice for mild to moderate pain. Unlike NSAIDs, it works on the central nervous system and does not typically interfere with the bodily functions that regulate blood pressure, such as kidney function or prostaglandin production, in the same way. This makes it a safer option for occasional use when you have a headache, fever, or body aches.
Even Paracetamol Requires Care
While paracetamol is generally safer, it's not entirely without risk, especially with long-term, high-dose use. Recent studies have suggested that regular daily intake of high-dose paracetamol can also lead to a small but significant increase in blood pressure in people with hypertension. A 2022 study found that 4g of paracetamol daily over two weeks raised systolic blood pressure by about 5 mmHg compared to a placebo. The key takeaway is that for occasional pain, it remains the preferred option. However, if you need pain relief daily, you should not continue out of habit without first consulting your doctor.
Other Options for Pain Management
When pain is localised to a specific joint or muscle, topical NSAIDs (gels or creams) can be a useful alternative. These deliver the medication directly to the source of pain with minimal absorption into the bloodstream, lowering the risk of affecting blood pressure. For chronic or severe pain, your doctor might discuss other approaches, including non-pharmacological methods like physical therapy, or in specific, controlled situations, short-term use of other classes of painkillers like opioids. These require careful medical supervision.
The Most Important Step: Talk to Your Doctor
Navigating pain relief while managing hypertension is a balancing act. The right choice depends on your specific health profile, the medications you take, and the type of pain you're experiencing. Before you start taking any new over-the-counter painkiller regularly, it's crucial to have a conversation with your doctor or pharmacist. Be sure to inform them of all medications you take, including supplements. They can provide personalised advice, ensure you're not taking 'hidden' NSAIDs in cold and flu remedies, and help you monitor your blood pressure to ensure your treatment remains effective.
