Most Common Medications for Elderly Parents — What Caregivers Need to Know

You're sitting in the pharmacy waiting area with a bag containing four new prescriptions for your father. The pharmacist printed out four pages of side effects in tiny type. You folded them into the bag and told yourself you'd read them later. You didn't.

That's not a character flaw — it's a system failure. Medication information is presented in clinical language designed for healthcare professionals, not for the adult child who's suddenly managing a parent's health alongside their own job and family. You don't need to become a pharmacist. But you do need to understand the basics of what your parent takes, why they take it, and what to watch for.

Here are the most commonly prescribed medication categories for adults over 65, explained in language that actually helps.

Blood pressure medications

What they are: ACE inhibitors (lisinopril, enalapril, ramipril), ARBs (losartan, valsartan, irbesartan), calcium channel blockers (amlodipine, diltiazem), beta-blockers (metoprolol, atenolol), diuretics (hydrochlorothiazide, furosemide).

Why your parent takes them: Hypertension (high blood pressure) affects roughly two-thirds of adults over 65. Untreated, it dramatically increases the risk of stroke, heart attack, kidney failure, and dementia.

Side effects to watch for:

• Dizziness when standing up (orthostatic hypotension) — this is a major fall risk factor. If your parent feels lightheaded when they get out of bed or stand up from a chair, tell the doctor.
• Dry cough with ACE inhibitors — persistent and annoying. The doctor can switch to an ARB, which rarely causes cough.
• Swollen ankles with amlodipine — common and benign but uncomfortable.
• Frequent urination with diuretics — can cause dehydration if your parent doesn't drink enough water. Time the dose for morning, not evening.

Key interactions: NSAIDs (ibuprofen, naproxen) reduce the effectiveness of most blood pressure medications. If your parent takes daily ibuprofen for arthritis and their blood pressure is creeping up, this may be why. Paracetamol (acetaminophen/Tylenol) is generally safer for pain in this context.

Cholesterol medications (statins)

What they are: Atorvastatin (Lipitor), rosuvastatin (Crestor), simvastatin (Zocor), pravastatin (Pravachol).

Why your parent takes them: Statins lower LDL cholesterol and reduce cardiovascular risk. They are among the most widely prescribed medications in the world.

Side effects to watch for:

• Muscle pain or weakness (myalgia) — the most commonly reported side effect. It ranges from mild aching to severe weakness. If your parent complains of new muscle pain after starting a statin, report it.
• Memory complaints — some patients report "brain fog." The evidence on statins and cognition is mixed, but it's worth mentioning to the doctor if your parent notices changes.

Key interactions: Grapefruit juice increases blood levels of simvastatin and atorvastatin (but not rosuvastatin or pravastatin). Certain antibiotics (clarithromycin, erythromycin) can dangerously increase statin levels. If your parent is prescribed an antibiotic, remind the prescriber about the statin.

Diabetes medications

What they are: Metformin, glipizide, glimepiride, sitagliptin (Januvia), empagliflozin (Jardiance), insulin.

Why your parent takes them: Type 2 diabetes affects roughly 25-30% of adults over 65. Management involves controlling blood sugar to prevent complications — kidney disease, nerve damage, vision loss, cardiovascular disease.

Side effects to watch for:

• Low blood sugar (hypoglycemia) — the biggest acute risk with insulin and sulfonylureas (glipizide, glimepiride). Symptoms: shakiness, confusion, sweating, irritability. In a senior with cognitive decline, hypoglycemia can look like worsening dementia. Keep glucose tablets or juice boxes accessible.
• GI upset with metformin — nausea, diarrhea, stomach cramps. Usually improves with time. Taking it with food helps. The extended-release formulation causes less GI distress.
• Urinary tract infections with SGLT2 inhibitors (empagliflozin, dapagliflozin) — increased sugar in the urine feeds bacteria. Watch for increased urination, burning, or confusion (which can be the only sign of a UTI in an elderly person).

Key interactions: Alcohol increases the risk of hypoglycemia with insulin and sulfonylureas. Steroid medications (prednisone) raise blood sugar significantly — temporary dose adjustments may be needed.

Blood thinners (anticoagulants)

What they are: Warfarin (Coumadin), apixaban (Eliquis), rivaroxaban (Xarelto), dabigatran (Pradaxa), low-dose aspirin.

Why your parent takes them: To prevent blood clots, stroke, and pulmonary embolism. Common after atrial fibrillation diagnosis, deep vein thrombosis, or heart valve replacement.

Side effects to watch for:

• Bleeding — the major risk. Watch for: unusual bruising, blood in urine or stool (can appear black and tarry), nosebleeds that won't stop, bleeding gums, unexplained weakness or dizziness. Any head injury while on blood thinners needs immediate medical attention.
• With warfarin specifically: frequent blood tests (INR monitoring) are required. The therapeutic range is narrow, and many foods and drugs affect levels.

Key interactions: This is the drug class with the most dangerous interaction potential.

• NSAIDs (ibuprofen, naproxen, aspirin) dramatically increase bleeding risk when combined with any blood thinner.
• Vitamin K-rich foods (kale, spinach, broccoli) affect warfarin levels. The issue isn't eating these foods — it's inconsistency. Eating a salad every day is fine. Eating no greens for a week and then having a large kale salad is not.
• Many antibiotics interact with warfarin. Any time a new medication is prescribed, remind the doctor about the blood thinner.

Acid reflux medications (PPIs)

What they are: Omeprazole (Prilosec), esomeprazole (Nexium), lansoprazole (Prevacid), pantoprazole (Protonix).

Why your parent takes them: Gastroesophageal reflux disease (GERD), stomach ulcers, or protection against stomach irritation from other medications (like NSAIDs or aspirin).

Side effects to watch for (with long-term use):

• Increased fracture risk — long-term PPI use is associated with reduced calcium absorption and higher rates of hip, wrist, and spine fractures.
• Magnesium deficiency — can cause muscle cramps, irregular heartbeat, and seizures.
• Kidney problems — chronic interstitial nephritis.
• C. difficile infection — PPIs alter gut bacteria balance.

Important note: PPIs are often started in the hospital and continued indefinitely without reassessment. If your parent has been on a PPI for more than 8 weeks, ask the doctor whether it's still necessary. Many patients can step down to an H2 blocker (famotidine/Pepcid) or stop entirely. This should be done gradually, not abruptly, as rebound acid production occurs.

Thyroid medication

What it is: Levothyroxine (Synthroid, Levoxyl, Euthyrox).

Why your parent takes it: Hypothyroidism (underactive thyroid). Extremely common in older adults, especially women.

Side effects to watch for:

• At the correct dose, side effects are rare because you're replacing a natural hormone. Problems come from incorrect dosing: too high a dose causes palpitations, anxiety, weight loss, and bone thinning. Too low a dose causes fatigue, weight gain, constipation, and cold intolerance.
• Symptoms of incorrect dosing can be subtle and mistaken for "just getting older."

Key interactions:

• Calcium and iron supplements block absorption. Take levothyroxine on an empty stomach, at least 30-60 minutes before eating and at least 4 hours away from calcium or iron.
• Coffee can reduce absorption if taken at the same time. Take the pill first, then wait before coffee.
• Some PPIs reduce absorption — another reason to review long-term PPI use.

Pain medications

What they are: Paracetamol/acetaminophen (Tylenol), tramadol, opioids (codeine, oxycodone, hydrocodone, morphine), gabapentin, pregabalin.

Why your parent takes them: Arthritis, neuropathy, chronic back pain, post-surgical pain.

Side effects to watch for:

• Constipation with opioids — nearly universal. A bowel regimen (stool softener, laxative) should be started alongside any opioid prescription, not after the problem develops.
• Sedation and fall risk with opioids, tramadol, and gabapentin — especially in the first few days of a new prescription or dose increase.
• Paracetamol toxicity — the maximum safe dose is 3,000 mg per day for older adults (some sources say 2,000 mg). The danger is that paracetamol is hidden in many combination products (Tylenol PM, cold and flu remedies, some prescription painkillers). Your parent may be taking more than they realize.

Osteoporosis medications

What they are: Alendronate (Fosamax), risedronate (Actonel), denosumab (Prolia), calcium and vitamin D supplements.

Why your parent takes them: To prevent fractures from osteoporosis, which affects roughly 1 in 3 women and 1 in 5 men over 50.

Side effects to watch for:

• Esophageal irritation with oral bisphosphonates — must be taken first thing in the morning, with a full glass of water, then remain upright (no lying down) for at least 30 minutes. Failure to follow these instructions can cause severe esophageal ulcers.
• Jaw problems (osteonecrosis of the jaw) — rare but serious with long-term use. Dental work should be completed before starting these medications if possible.

The tracking problem

The real danger isn't any single medication. It's the combination — and the fact that no single doctor sees the complete picture. The cardiologist prescribed the blood thinner. The rheumatologist prescribed the NSAID. The GP prescribed the PPI to protect the stomach from the NSAID. The endocrinologist adjusted the diabetes medication. Nobody checked whether the antibiotic from the urgent care visit interacts with the blood thinner.

You are the only person who sees all of it. That makes you the most important safety check in your parent's healthcare system — even though you never asked for the job.

If you don't have a current, complete medication list that tracks every prescription, supplement, and OTC drug your parent takes, start there. The tracking worksheets in the Medication Management Kit are designed for exactly this — a master list that you bring to every doctor visit, share with every sibling, and hand to every paramedic. Because the information matters most precisely when you're too stressed to remember it.