Cold and Flu Medicine Warning: 4 Ingredients to Check if You Take Ramipril, Atorvastatin, or Metformin

Taking ramipril, atorvastatin, or metformin? Discover four cold and flu medicine ingredients to check and how to avoid potential medication interactions.

Why Some Cold and Flu Medicines May Not Be Suitable for You

As temperatures drop and seasonal viruses begin to spread, many people turn to over-the-counter cold and flu medicines for relief from symptoms such as headaches, fever, a blocked nose and a sore throat.

However, buying a medicine without a prescription does not automatically mean it is suitable for everyone. Certain ingredients in common cold and flu remedies may interact with prescription medicines or increase the risk of unwanted side effects, particularly in people with existing health conditions.

People taking medicines such as ramipril for high blood pressure, atorvastatin to manage cholesterol, or metformin for type 2 diabetes should pay particular attention to the ingredients in combination cold and flu products.

According to advice highlighted by GP Dr Rupa Parmar, Medical Director at Midland Health, some remedies contain several active ingredients in one tablet, capsule or sachet. This can make it easy to take unnecessary medicines or accidentally double up on an ingredient.

Before choosing a product, here are four ingredients worth checking.

1. Decongestants: A Potential Concern for High Blood Pressure

Decongestants are commonly used to relieve a blocked or stuffy nose. Ingredients such as pseudoephedrine and phenylephrine help reduce swelling inside the nasal passages, making breathing through the nose easier.

However, some decongestants can increase blood pressure and heart rate. This may be a concern for people with hypertension, heart disease or certain other medical conditions.

If you take ramipril or lisinopril to manage high blood pressure, speak to a pharmacist before using a cold remedy containing a decongestant. These medicines may not be appropriate for everyone, and your overall health and blood pressure control should be considered.

People with diabetes should also seek advice before choosing a decongestant, as certain products may be unsuitable depending on their condition and other medicines.

Decongestants can also worsen urinary difficulties in some men with an enlarged prostate.

What should you do?

Check the active ingredients on the packaging rather than relying on the product name. Ask a pharmacist whether a suitable alternative, such as a saline nasal spray, could help relieve your symptoms.

2. Paracetamol: Avoid Accidentally Taking Too Much

Paracetamol is widely used to relieve pain and reduce fever. It is included in many cold and flu remedies, particularly products marketed for treating several symptoms at once.

The problem arises when someone takes a combination cold medicine alongside separate paracetamol tablets without realising that both products contain the same ingredient.

Taking more paracetamol than recommended can cause serious liver damage. The risk can develop even when someone believes they are following the instructions for two different medicines.

For many adults, the usual maximum recommended dose is 4,000 mg in 24 hours, equivalent to eight 500 mg tablets. However, this limit is not suitable for everyone. People who weigh less, have liver problems, regularly drink substantial amounts of alcohol or have other risk factors may need a lower maximum dose.

Always follow the instructions for your specific medicine and seek professional advice if you are unsure.

What should you do?

Read the ingredients list on every product you take. If your cold and flu remedy already contains paracetamol, do not add another paracetamol product unless a healthcare professional has confirmed that the combined dose is safe.

If you think you have taken too much paracetamol, seek urgent medical advice immediately, even if you feel well.

3. Anti-Inflammatory Medicines: Consider Kidney, Stomach and Heart Risks

Some cold and flu products contain anti-inflammatory painkillers, including ibuprofen. These medicines can help relieve headaches, aches and fever, but they are not suitable for everyone.

Ibuprofen and other non-steroidal anti-inflammatory drugs (NSAIDs) can increase the risk of stomach irritation, ulcers and gastrointestinal bleeding. They may also affect kidney function and increase certain cardiovascular risks.

These concerns are particularly important for older adults and people with existing kidney, heart or blood pressure problems.

People taking ramipril should be especially cautious. Combining an ACE inhibitor such as ramipril with an NSAID such as ibuprofen can increase the risk of kidney problems, particularly if the person is dehydrated or also takes certain diuretics.

The risk of bleeding may also be higher for people who take blood-thinning medicines, including warfarin, or who use aspirin in certain circumstances.

What should you do?

Do not assume ibuprofen is safe simply because it is available without a prescription. Check with a pharmacist or doctor before taking it if you have a long-term condition or regularly use prescription medicines.

This is particularly important if you are experiencing a fever, vomiting or diarrhoea, as dehydration can place additional strain on your kidneys.

4. Sedating Antihistamines: Watch for Drowsiness and Falls

Some night-time cold and flu medicines contain sedating antihistamines. These ingredients can help with certain symptoms, including a runny nose, while also causing drowsiness.

However, their effects can last into the following morning. Older adults may be more sensitive to these medicines because the body can take longer to process and eliminate them.

Potential side effects include daytime sleepiness, dizziness, confusion and a greater risk of falls. Some sedating antihistamines can also make it harder to pass urine, particularly in people with an enlarged prostate.

The effects may be more pronounced when these medicines are combined with alcohol, sleeping tablets or other medicines that cause drowsiness.

What should you do?

Ask a pharmacist whether a non-sedating or otherwise more suitable option is available for your symptoms. Avoid driving or operating machinery if a medicine makes you sleepy, and do not combine sedating products without professional advice.

How to Choose Cold and Flu Medicine More Safely

You do not necessarily need to avoid every over-the-counter cold remedy if you take regular medication. The important thing is to select a product that suits your symptoms, medical history and existing prescriptions.

Follow these practical steps:

• Check the active ingredients: Look beyond the brand name and read the full ingredients list.
• Keep a medication list: Include prescription medicines, over-the-counter products, vitamins and supplements.
• Treat individual symptoms: A single-ingredient medicine may be more appropriate than an all-in-one cold and flu remedy.
• Speak to a pharmacist: Ask for advice before buying cold medicines if you take ramipril, atorvastatin, metformin or other regular prescriptions.
• Follow the dosage instructions: Never exceed the recommended dose or take a medicine for longer than directed.
• Consider vaccination: Check whether you are eligible for a free NHS flu vaccination, particularly if you are aged 65 or over or have an eligible health condition.

Remember that atorvastatin and metformin do not automatically rule out every cold and flu treatment. However, your full medication list and any other health conditions should be considered before choosing a product.

When Should You Seek Medical Advice?

Most colds improve with rest, fluids and appropriate symptom relief. However, contact a healthcare professional if your symptoms worsen, persist longer than expected or you are concerned about how an illness may affect an existing medical condition.

Seek urgent medical help for severe breathing difficulties, chest pain, significant confusion or other serious symptoms.

If you are unsure whether a cold and flu medicine can be taken with your regular prescriptions, your pharmacist can help you check for potential interactions before you take it.

Final Thoughts

Cold and flu medicines can provide useful relief, but combination products may contain ingredients that are unsuitable for some people.

Decongestants, additional paracetamol, anti-inflammatory painkillers and sedating antihistamines are four categories worth checking carefully, especially if you have high blood pressure, diabetes, heart problems or kidney concerns.

If you take ramipril, atorvastatin, metformin or several prescription medicines, take a moment to read the label and ask a pharmacist for advice. Choosing a treatment that addresses your actual symptoms can help you avoid unnecessary ingredients and reduce the risk of preventable side effects.

Source: Daily Mirror, published 7 October 2026.

Medical disclaimer: This article is intended for general information and educational purposes only. It is not a substitute for personalised medical advice, diagnosis or treatment. Medication suitability and dosage depend on individual circumstances. Always read the patient information leaflet and consult a qualified pharmacist or doctor if you have questions about medicine interactions. Never stop or change prescribed medication without professional guidance.