Common Side Effects of Everyday Medicines

Medicines are designed to help us manage health problems, relieve symptoms, and treat illnesses. But like any substance that affects the body, medicines can sometimes cause unwanted effects.

These are known as side effects. They can range from mild and temporary symptoms to reactions that require medical attention.

Knowing what to expect can help you use medicines more safely and recognise when a side effect shouldn't be ignored.

What Are Medicine Side Effects?

A side effect is an unwanted or unexpected effect that can occur when you take a medicine.

Not everyone experiences side effects, and the type and severity can vary from person to person.

Some side effects may disappear as your body adjusts to the medicine, while others may require a change in treatment.

It's important to remember that experiencing a side effect doesn't necessarily mean the medicine is unsafe or that you should stop taking it immediately.

Common Side Effects You May Experience

Different medicines cause different side effects, but some symptoms occur more frequently across many types of medicines.

Nausea and Stomach Upset

Feeling sick, experiencing stomach discomfort, or having indigestion can occur with certain medicines.

Taking a medicine with food may help with some products, but not all medicines should be taken with food.

Always check the instructions on the label or ask your pharmacist.

Diarrhoea or Constipation

Some medicines can affect the digestive system and cause diarrhoea or constipation.

Antibiotics, for example, can sometimes cause diarrhoea, while certain pain medicines and other medicines may contribute to constipation.

If symptoms are severe, persistent, or accompanied by other concerning symptoms, speak with a healthcare professional.

Headache

Headaches can occur as a side effect of some medicines.

If you develop frequent or severe headaches after starting a new medicine, let your doctor or pharmacist know.

Don't automatically take another medicine to treat the headache without checking whether it could interact with your existing treatment.

Drowsiness

Some medicines can make you sleepy or less alert.

This can be particularly important if you're driving, operating machinery, or doing anything that requires concentration.

If a new medicine makes you unusually drowsy, check with your pharmacist about whether you should avoid these activities.

Dizziness

Some medicines can cause dizziness or light-headedness.

This may increase the risk of falling, particularly in older adults.

If you feel dizzy after taking a medicine, get up slowly from sitting or lying down and speak with a healthcare professional if the problem continues.

Dry Mouth

Certain medicines can reduce saliva production and leave your mouth feeling unusually dry.

Drinking water regularly may provide some relief, depending on the cause.

Persistent dry mouth should be discussed with a healthcare professional because it can affect oral health.

Skin Rash

Some medicines can cause skin reactions.

A mild rash may not be serious, but a rash that spreads quickly or occurs alongside swelling, difficulty breathing, or other severe symptoms can indicate a serious allergic reaction.

Seek urgent medical attention if you experience signs of a severe allergic reaction.

Why Do Side Effects Happen?

Medicines are designed to produce specific effects, but they can also affect other processes in the body.

Side effects can occur because of how the medicine interacts with different organs, tissues, or chemical pathways.

Your individual characteristics can also influence how you respond to a medicine.

Factors such as age, body size, other medicines, health conditions, genetics, and how your body processes medicines can all play a role.

Can Two People Have Different Side Effects?

Yes.

One person may take a medicine without experiencing any noticeable problems, while another person may experience several side effects.

This doesn't necessarily mean that either person is taking the medicine incorrectly.

Individual responses to medicines can vary considerably.

Some Side Effects May Improve With Time

Certain mild side effects may become less noticeable as your body adjusts to a medicine.

However, you shouldn't assume that every side effect will disappear on its own.

If you're concerned about a symptom, speak with your pharmacist or doctor rather than stopping your medicine or changing the dose yourself.

Don't Stop Prescription Medicine Without Advice

If you experience a side effect, it can be tempting to stop taking the medicine immediately.

For some medicines, suddenly stopping treatment can cause problems or allow the original condition to return or worsen.

Unless you're experiencing a medical emergency, contact your doctor or pharmacist for advice before making changes to a prescribed treatment.

Be Careful With Over-the-Counter Medicines

Side effects aren't limited to prescription medicines.

Over-the-counter pain relievers, cold medicines, allergy medicines, and other products can also cause unwanted effects.

Because these medicines are easy to purchase, people sometimes underestimate their potential risks.

Always follow the recommended dose and read the product information before using them.

For medicines, vitamins, supplements, skincare products, laboratory products, and other healthcare essentials, explore the Meddylab online store.

Medicines Can Interact With Each Other

Taking multiple medicines can increase the possibility of interactions.

One medicine may change how another medicine works or increase the likelihood of certain side effects.

This includes prescription medicines, over-the-counter products, vitamins, and supplements.

Tell your pharmacist or doctor about everything you're taking before starting a new medicine.

What About Herbal Products and Supplements?

"Natural" doesn't always mean risk-free.

Herbal products and supplements can also cause side effects or interact with medicines.

If you're taking supplements alongside prescription or over-the-counter medicines, tell your healthcare professional.

Keeping a complete list of everything you take can make it easier for them to identify potential problems.

How Can You Reduce the Risk of Side Effects?

You can't eliminate every possible side effect, but you can reduce the risk of medication problems by:

• Taking medicines exactly as directed.
• Following the recommended dose.
• Reading the medicine leaflet.
• Checking the active ingredients in combination products.
• Telling your doctor about allergies.
• Informing your pharmacist about other medicines and supplements.
• Avoiding medicines prescribed for someone else.
• Storing medicines according to their instructions.
• Asking questions when you're unsure.

When Should You Contact a Pharmacist?

A pharmacist can help you determine whether a symptom could be related to your medicine and what you should do next.

Contact your pharmacist if:

• A side effect is bothering you.
• A symptom continues or becomes worse.
• You aren't sure whether a symptom is related to your medicine.
• You're considering stopping a medicine.
• You're taking several medicines and are concerned about interactions.
• You want to start a new supplement while taking medicine.

For convenient access to medicines, vitamins, supplements, skincare products, laboratory products, and other healthcare essentials, shop from Meddylab.

When Is a Side Effect an Emergency?

Some symptoms can indicate a serious reaction and require urgent medical attention.

Seek emergency care if you experience symptoms such as:

• Severe difficulty breathing.
• Swelling of the face, lips, tongue, or throat.
• Loss of consciousness.
• Severe confusion.
• A rapidly spreading or severe rash.
• Severe chest pain.
• Other symptoms that appear life-threatening.

Don't wait for a routine pharmacy visit if you think you're experiencing a serious medical emergency.

Keep Track of New Symptoms

If you start a new medicine and notice an unusual symptom, make a note of when it started and when you took the medicine.

This information can help your doctor or pharmacist determine whether the symptom could be related to the medicine.

Keeping track of all your medicines and supplements can also make medication reviews easier.

Final Thoughts

Side effects are a possible part of using many medicines, but experiencing one doesn't automatically mean that the medicine is wrong for you.

Mild symptoms such as nausea, headache, dizziness, drowsiness, or stomach upset can occur with different medicines. More serious symptoms, however, should never be ignored.

Read your medicine information, follow the recommended instructions, and tell your pharmacist or doctor about anything unusual or concerning.

Most importantly, don't change or stop a prescribed medicine on your own unless you're experiencing a serious reaction that requires urgent medical attention.

For more practical information about medicines, side effects, supplements, and everyday healthcare, read more on the Meddylab blog.

Stay connected with Meddylab for useful healthcare information by following Meddylab on X, following Meddylab on Instagram, and watching Meddylab's healthcare videos on YouTube. You can also find Meddylab on Google.