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Medication Safety

Medication and Supplement Safety After 50

What you need to know about side effects, interactions, dosing mistakes, supplement risks and medication reviews to stay safe as you age


pill bottles with a red flag
Kyle Hilton

Key takeaways

  • Taking five or more medications can raise the risk of side effects, drug interactions and medication-related hospitalizations in older adults. 
  • “Deprescribing” efforts help patients and clinicians review medications regularly to determine whether each drug is still necessary. 
  • Medication reviews should include prescriptions, over-the-counter drugs, vitamins and supplements. Some medicines may need to be tapered off rather than stopped abruptly.

Index

Medications can be a lifeline for people facing illness or chronic health conditions. A pill a day can often mean reduced pain, better quality of life or even a longer life. But medications can also cause serious harm if they are taken incorrectly, trigger an allergic reaction or interact with other prescriptions or supplements. 

According to the Centers for Disease Control and Prevention, adverse drug events lead to 1.5 million emergency visits‎‎ every year. And the U.S. Food and Drug Administration’s Office of Surveillance and Epidemiology (OSE), which monitors and evaluates drug safety profiles, reviews more than 2 million reports of adverse events and medication errors annually. Older adults are especially vulnerable to medication risks, in part because they are more likely to take multiple prescriptions. 

KFF, a nonprofit focused on health and policy research and polling, released a survey showing that 6 in 10 people age 65 and older reported taking four or more prescription medications — and this number may not include over-the-counter (OTC) vitamins, minerals and supplements. Medication risks often increase when people take multiple prescription medications alongside over-the-counter drugs, like common pain relievers and allergy meds. 

While home-based medication errors and side effects are a common concern, don’t assume you or your loved one is not at risk when in a long-term care facility.

Read more on medication risks in long-term care.  

 “When we are adding another layer, which is the layer of nonprescribed medications such as supplements, on the already existing prescribed medications, we are creating this complexity of drug-supplement interaction, drug-drug interaction, side effects, allergic reactions and over-medicating errors,” says Dr. Parul M. Goyal, associate professor of medicine, and medical director of Population Health at Vanderbilt University Medical Center in Nashville, Tennessee. 

However, there are some steps you can take to protect yourself and your loved ones from medication-related risks.  

Why medication safety matters more after age 50 

Medications are a leading cause of harm for patients, and older people may face more side effects than their younger counterparts, says Dr. David W. Bates, a professor of medicine at Harvard Medical School and director of the Center for Patient Safety Research and Practice at Boston’s Brigham and Women’s Hospital, who also serves as the editor of the Journal of Patient Safety.  “As you age, you typically need fewer medications and often lower dosages of medications,” he adds.  

Additionally, our ability to process medications changes with age.  

“As we get older, our ability to clear, or metabolize, the medications decreases and our ability to accumulate medications increases, primarily because the medications are stored in our body for a longer time and usually in the fat cells,” Goyal says.  “And most of the medications are metabolized either through the liver or through the kidneys. As we are getting older, both those functions slow down, and hence our ability to clear those medications is not as fast.”  

Kidney and liver damage from medication can be relatively subtle, with few noticeable outward symptoms. That’s why it’s important to get regular blood tests when you are on medications to see how the medication is working for you and whether you are having any undetected side effects, Goyal says.

Medication side effects to watch out for

As for more obvious side effects, “lightheadedness and dizziness are some of the ones we worry about the most,” Bates says. However, some medications can cause memory issues. Sleep disruption, tiredness and difficulty driving are also possible side effects of many drugs. 

There are specific categories of medications that can be concerning, notably anticholinergic drugs, used to treat everything from Parkinson’s disease to insomnia, to allergies, to incontinence. These can make you dizzy when you stand up and substantially increase the risk of falling, Bates says. More than 600 medications have anticholinergic properties. Other medications, including some used to treat depression, chronic pain and psychiatric conditions, may also have anticholinergic effects. 

The important thing is to observe how you feel after taking a medication, including an OTC drug, especially when it is new to you. “If you observe a pattern, like every time after you’re taking a medication, say two hours later, you feel lightheaded, that’s also something to make note of and to tell your physician about,” Bates says.  

General side effects versus emergency side effect

Most common side effects of medications can be dealt with by talking to your doctor about reducing or switching your medication.  However, some side effects require emergency treatment. 

For example, common side effects of angiotensin-receptor blockers and angiotensin converting enzyme inhibitors — used to treat high blood pressure — can include nausea, more frequent urination or tiredness, Goyal says. But tongue, lip or facial swelling “or feeling like you can’t breathe after taking the medication,” warrants immediate medication attention, she adds.  

For more information on adverse drug reactions, visit the FDA’s Finding and Learning About Side Effects site. MedlinePlus, a service of the National Library of Medicine/National Institutes of Health , offers a searchable database of prescription drugs and OTC medicines, including side effects and special precautions.

How to avoid being harmed by medications and supplements

There are steps that patients and caregivers can take to reduce the risk of being harmed by prescription medications and OTC drugs. Goyal and Bates recommend the following:  

  • Always double-check to make sure that you are measuring doses correctly and following the label directions exactly, including proper storage of medication.
  • Ask your doctor or pharmacist about the proper timing of medications.
  • Never share prescription medication with other people in your household.
  • When possible, use one pharmacy and develop a relationship with your pharmacist so they are aware of your health conditions and any potential adverse interactions.
  • Most importantly, create a list of your medications, including vitamins and supplements, with their dosages and medication timing. Bring this list to the doctor so that you can have an informed conversation about what you are taking. (Also, keep this list handy at home and when traveling in case of emergency.)

By bringing your medication list to your doctor’s appointment, you may be able to go through the “deprescribing” process, where doctors take you off medications that may no longer be needed, or shift you to a newer and better medication.  

“Oftentimes, my patients will carry a [medication list], but it will not have their doses, it will not have how many times they take it, or the list is not updated,” Goyal says. Having an up-to-date and accurate list is very important, she says. “Especially in this day and age, when adults are traveling more — when you’re out of town, you get sick or if there’s an emergency — the provider, [who] is treating should know what medications you’re on.”

This up-to-date medication list is vitally important when you are being discharged from the hospital and bringing new medications home with you. The Journal on Quality and Patient Safety notes that an estimated 46 percent of medication errors occur during the patient’s admission to or discharge from a clinical unit and/or hospital. To combat this, at discharge the medical staff will reconcile the patient’s home medicine list with the hospital medication list to help ensure that no potential interactions or duplications are introduced.  

Schedule a medication review 

If you do not have time to discuss your full medication list at your annual visit, you can also schedule a medication review appointment, which may be covered by Medicare under certain conditions. Some private health insurance plans may cover a medication review or medication management service, depending on the provider and state. Patients should contact their insurance plan to confirm eligibility.

Signs you need a medication review

  • You are taking five or more medications and supplements — a situation often referred to as polypharmacy.
  • You see multiple medical specialists, which can lead to multiple prescriptions.
  • You experience new symptoms, including falls, fatigue, confusion, dizziness or light-headedness, after taking a prescription medication or a new over-the-counter drug, particularly if you notice a pattern after taking the medication at a specific time every day.
    • Note: The amount of time it takes for medications to take effect varies; some may take weeks. Ask your doctor when you may start noticing side effects.

Patients should also bring prepared questions for their doctor to help streamline deprescribing efforts during a medication review, Goyal says.  

Questions to ask your doctor about deprescribing current medications  

  • Why am I taking this medication? What is its purpose?
  • Can I discontinue this medication? If I do, what should I expect?
  • If discontinuing isn’t possible, how long should I take it?
  • How do I dispose of unused medications?  

For a printable list of these questions, please click here.  

Discuss new prescriptions thoroughly 

When your doctor suggests a new medication, it’s useful to ask them what the indication for the medication is, if there are particular side effects that you should be watching out for and if there are any specific concerns for you as an individual, given your medical issues. “For example, if somebody is a little unsteady on their feet, any medication that might make you more likely to fall is a particularly big concern,” Bates says.  

It’s also important to ask how you should take your medicine — for example, whether it should be taken with food or not, and how hard and fast that rule is.  “I’ve found that some of my patients get more worried about that than they really need to be,” Bates says.  Sometimes the potential consequences of not taking a medicine as directed are very serious. “Other times, it might be that [the medicine] just would not absorb as well as if you did not take it with food.”  

Questions to ask your doctor about new medications 

  • What would be a general side effect from this medication, and what would be considered an emergency side effect?
  • How long do side effects last, and what should I do if you experience one? Which side effects will go away with time?
  • Does this medication interact with the rest of the medications I’m taking, including supplements, or any food that I may eat?
  • What should I do if I skip a dose or if I accidentally miss a dose?  

For a printable list of these questions, please click here. 

Potentially inappropriate prescribing cascades 

Adding new medications can be especially dangerous when one drug causes a side effect that is mistaken for a new condition, and then another drug is prescribed to treat that condition, a pattern known as a potentially inappropriate prescribing cascade. That secondary drug may then cause other problems or interactions. A new study published in the BMJ looked at the prescription data for more than 2 million older adults in Ontario, Canada, and identified common drug combinations where this may be likely to occur.  

The results included commonly used drugs such as statins for high cholesterol, which can lead to the prescribing of pain relievers to treat the side effects of muscle aches, pain and cramps that may result from the statins. Pain relievers like NSAIDs (such as Advil and Aleve) can cause their own medical issues, including high blood pressure, which then may be treated with a high blood pressure medication without considering that the original pain medicine is causing the hypertension. 

The study provides a watch list (Table 3 in the study text) that prescribers can use to ask when a new problem is really a side effect of an existing drug, or an actual medical condition. It’s important to discuss all your other medications with your doctor, including whether you have been experiencing side effects, before starting a new prescription or OTC drug.

Confusion about dosage recommendations

Patients’ misunderstanding of dosage recommendations can also lead to medication side effects and errors, especially for vitamins and supplements. The labels of OTC drugs can be a confusing alphabet soup. From “mg” to “mcg” to “IU” and even multiple measurements being on the same pill bottles, it can be very easy for patients to take the wrong dose.

Medication dosages are typically described in units of measure, and different categories are used for different types of vitamins and supplements. (See sidebar.)

Medication Units of Measure:

  • g = gram: A standard metric unit of weight, rarely used for individual vitamins but sometimes seen in larger macronutrient doses like protein or fiber.
  • mg = milligram (one thousandth of a gram): This is commonly used for larger nutrient doses, such as vitamin C, calcium or magnesium.
  • mcg = microgram (one millionth of a gram): This is commonly used for micronutrients when describing the amounts your body needs from your body each day, such as vitamin B12, folate or biotin. (1,000 mcg equals 1 mg).
  • IU = International Unit: A measure of biological activity or potency rather than physical weight. It was traditionally used for fat-soluble vitamins like vitamins A, D and E, but has been replaced by other measurements in recent years.

Specialized Units:

  • mcg RAE (Retinol Activity Equivalents): Used for vitamin A.
  • mcg DFE (Dietary Folate Equivalents): Used for folate/folic acid
  • mg NE (Niacin Equivalents): Used for niacin (vitamin B3)​

“There can be a lot of confusion between mcg and mg. This is widely common,” Goyal says. For example, patients often say they are taking 1,000 mg of B12, but that vitamin is actually listed in mcg. “The onus then falls on the provider to clarify the confusion.”

A pill bottle that shows how to read the iron measurement in the pill.
Oral iron supplements sometimes list multiple strengths. In this case, follow the measurement for the main element you are looking for, which would be the 65 mg of elemental iron.
Hugo Herrera

Vitamin D is also notorious for confusion, Goyal says, because it comes in measurements of IU but also mcg. There can also be multiple strengths listed on some vitamin bottles, for example, with an oral iron supplement, a 325 mg tablet of ferrous sulfate actually contains only 65 mg of iron. In that case, it’s important to follow the measurement for the main element you are looking for, which would be the 65 mg of elemental iron, Goyal says.

To help prevent dosage errors for vitamins and supplements, Goyal recommends taking a picture of your medication/supplement bottles to show to your medical provider or bringing them with you to your next appointment.

Drug shortages can lead to medication issues

Drug shortages can also increase the risk of medication errors or new side effects when patients have to switch to a substitute medication that may work differently from the one they usually take.

Drug shortages can be caused by everything from disruptions to the supply chain, manufacturing issues or a sudden increase in demand.

There have been many times when there were shortages of even very commonly used medications, which has required people to switch. “And that is a tricky and a vulnerable situation.” Bates says. “For many drugs, we do have good substitutes, which are just fine to take. But sometimes there are things for which they’re not good substitutes. I think given the number of shortages that we’ve had lately, it’s likely to happen to most people at some time or another.”

Beyond new side effects, another risk comes when the original medication becomes available again and is automatically refilled while the patient is still taking the substitute. That can happen if the old prescription remains active, Goyal says. “The patient then gets a direct supply of that old medication, and then they’re already taking the new medication from me, and [that is] a setup for disaster,” she says.

The use of both brand and generic names can add to the confusion, making it harder for patients to recognize when they are taking duplicate medications.

If you have trouble refilling a prescription or hear that your medication may be in shortage, there are steps you can take to prevent medication errors.

What to do during a drug shortage:

  • Check with your pharmacist first. Ask your pharmacist whether the shortage is temporary, whether your medication is available at another location, whether a different strength or formulation is available or whether the pharmacist can contact the prescriber about an alternative. (This is yet another reason that using one pharmacy is best practice.)
  • Look up your medicine in the FDA’s Drug Shortage Database, which shows current shortages and offers contact information to report suspected shortages. If your medication is in the database, talk to your doctor or pharmacist about long-term solutions.
  • Don’t stop taking the medication or change the dose without consulting your doctor or pharmacist. Stopping some drugs abruptly may be risky, as can skipping doses or splitting doses.
  • Document the process. If your prescriber switches your medication, write down the old drug name, new drug name, strength, dose, medication timing and reason for the change.
  • Make sure the old prescription is canceled or inactive to avoid taking duplicate or overlapping medications.
  • Watch for new symptoms after a medication switch. Dizziness, lightheadedness, confusion, unusual sleepiness, swelling, shortness of breath or other new symptoms should be reported promptly, especially after starting a substitute or changing the dose.

Technology is helping prevent medication errors  

Evolving technology can help both doctors and patients prevent medication errors and adverse effects. Often, online health portals will list medications and dosages in the patient’s file, which can help you keep track of your drug regimen at home.

Doctors also have access to more safety tools in their practices. For example, Vanderbilt University uses a database that can flag possible drug interactions for each patient.   

Pop-up prompts in medical records also encourage deprescribing efforts. Those prompts share risks of potentially inappropriate medications, and a recent study of patients aged 65 and older published in the JAMA found doctors are more likely to deprescribe at least one medication for their patients when seeing the prompts.

Through doctors, pharmacists and patients working together and staying informed, medication errors and side effects can be reduced while patients still receive the quality care they need to improve their health.

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Explore more about polypharmacy, side effects and other medication and supplement risks in the stories below:

Animation: AARP; (Source: Getty Images)

Medication and supplement recalls 

When you hear your medication or supplement has been recalled, your first instinct may be to stop taking it. However, many recalls apply only to specific manufacturers, products or lot numbers — not every version of a drug or supplement on the market. The safest first steps are to check the recall notice closely, compare it with the product in your home and talk to a pharmacist or health care provider before stopping a prescription medication.

Read more about how to handle a medication recall. Plus: Check out the latest drugs to be recalled. 

Polypharmacy: Are you taking too many medications? 

The accumulation of medications, called polypharmacy, or regularly taking five or more medications at a time, is itself a potential health hazard that’s worth discussing with your primary care provider. Older adults are particularly at risk as they have more health conditions and are usually getting more care. Fortunately, there’s a growing “deprescribing” movement within medicine that seeks to scale back on unnecessary prescriptions.  

Read more about polypharmacy and the deprescribing movement. 

Is it safe to split your pills? 

Research shows that about 12 percent of adults cut or split their pills in half to save money. Others may do it because they have trouble swallowing or want to adjust their dosage. But is this a safe practice? Many doctors and pharmacists discourage the practice in general, and for some types of medication, it should never be done. 

Read more about whether the risks of splitting pills.  

Medications that can cause weight gain

Almost any medication can cause side effects, including weight gain. Even a small increase in weight could affect your health and, in some cases, worsen the very condition you’re trying to treat, particularly conditions such as osteoarthritis and high blood pressure. Diabetes drugs, antidepressants, antihistamines and migraine medicine can all add on the pounds.

Read more about medications that cause weight gain, and how to manage it.

Supplement side effects

While most understand that prescription drugs can cause side effects, vitamins and supplements tend to fly under the radar. These drugs are sold over the counter and have less oversight, so it’s easy to miss warnings or assume they are automatically safe. Yet many can be harmful when taken in large quantities or can interact with your other medications and even certain foods.  

Read more about how to avoid potential vitamin and supplement side effects.

Vitamins you can overdose on

Vitamins and supplements are popular with older people, but taking too many can be risky and  can have negative interactions with other medications. These products aren’t subject to the same level of regulation as over-the-counter medications, yet are heavily marketed, sometimes with unsubstantiated claims. Overuse can even be fatal. 

Read more about the risks of certain vitamins and supplements. 

Food and drug interaction safety guide

When you’re prescribed a new medicine, it’s common to ask how it might interact with your other prescriptions. But have you asked how it might interact with food?

It turns out that some medications interact with fruits, veggies, snacks and drinks, and others shouldn’t be taken with food at all. 

Read more about potential food-drug interactions.  

Are there risks to taking a fish oil supplement? 

Many older adults regularly take fish oil supplements, otherwise known as omega-3- supplements, as part of their daily routine in hopes of protecting their heart, joints and brain. But evidence is mixed on the effectiveness, and getting too much can cause problems too, particularly for people with health conditions such as irregular heartbeat. Omega-3 supplements can also interact negatively with other medications. 

Read more about the benefits and risks of fish oil supplements. 

Common medications that can affect sleep 

While many prescriptions and over-the-counter drugs are vital for treating illness and other health conditions, some make it more difficult to fall asleep and stay asleep. Poor sleep has been linked to several chronic health conditions, including type 2 diabetes, cardiovascular disease, obesity and depression, as well as an increased risk of accidents and falls. But there are steps that you can take to mitigate disruption to your sleep cycle.  

Read more about medications that can affect your sleep.  

Medications that make you tired

Brian Scagnelli

Fatigue is a common medication side effect that can affect cognition, driving safety and fall risk in older adults. Blood pressure drugs, antihistamines, antidepressants, anti-anxiety medications, opioids and muscle relaxants can all contribute to tiredness.  

Read more about drugs that can cause fatigue. 

Medications that impair driving

You could be driving impaired without even realizing it. Common medications taken for everything from colds and seasonal allergies to anxiety and chronic pain can cause drowsiness, dizziness, nausea and blurred vision, making it unsafe to drive. Health experts recommend checking warning labels and taking time to learn how a new drug will affect you before driving. 

Read more about medications that impair driving. 

What medications should not be taken with a flu shot?

Some common medications can blunt your immune response to the flu vaccine, reducing its effectiveness. Timing your shot can help, providing a buffer between certain treatments and the flu shot, which can give your immune system time to respond fully. Talking with your health care provider ahead of flu season can help balance medication schedules with vaccine timing. 

Read more about medication and flu shot interactions. 

Brand name versus generic medications

Patients may worry that a generic over-the-counter painkiller or cold medicine won’t work as well as the brand names, especially because of the lower price tag. But generic medications are strictly regulated by the FDA. The only differences allowed are in the inactive ingredients: things like fillers, preservatives and binding agents. For many, these differences won’t cause a problem. However, inactive ingredients, such as dyes, gluten or lactose, that might be in the generic version could make the drug harder for some people to tolerate. 

Read more on brand name versus generic medications. 

What to know about statins and side effects

Statins are a common medication prescribed to lower LDL, or “bad,” cholesterol levels. While side effects are always possible, a large research review found that they are not common. Experts say that people with high cholesterol shouldn’t avoid statins for fear of side effects and that if you have concerns, talk to your doctor. 

Read more on statins and side effects.  

High blood pressure medication side effects

People taking blood pressure medications may experience feelings of fatigue and drowsiness among other side effects. The main culprits are beta blockers, alpha-adrenergic blockers and centrally acting alpha-adrenergic receptor agonists, although others can have these effects as well.  

Read about specific high blood pressure medications and side effects. 

Medications that can weaken bones

Kyle Hilton

Research shows that some of the most common medications among people 50 and over can lead to what’s known as medication-induced osteoporosis, and even an increased risk of fractures. With some medications, the longer a patient is on them, the higher the risk of fracture, many of which require one or more surgeries to hold the bones together and allow healing. Preventing these fractures should be a top priority for care providers and patients alike. 

Read more about medications that can weaken bones.  

Allergy medicine side effects

Some common allergy medicines can cause serious side effects in older adults, including confusion, heart issues and increasing the risk of falls. Nasal steroid sprays and certain antihistamines are safer and often more effective options. 

Read more about allergy medication side effects.

Prescription medications that can damage your liver

The liver is one of the most essential organs in your body; it cleans your blood and helps digest food. However, some common medications such as acetaminophen, NSAIDs and statins can make your liver sick due to a condition known as drug-induced liver injury. While most medications are safe when taken as directed, older adults can be more sensitive to these risks, so it’s important to talk to your health care provider about any concerns. 

Read more about medications that can harm your liver.

Popular supplements that can damage your liver

Herbal supplements can pose a risk to your liver, and older adults are among the most frequent users. Supplement-related liver injury can be unpredictable, build over time and lead up to liver failure. Mislabeling and contamination are common, making it hard to know what’s actually in a container. 

Read more about supplements that can harm your liver.

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The key takeaways were created with the assistance of generative AI. An AARP editor reviewed and refined the content.

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