In a patient with uncontrolled hypertension and nighttime headache, which of the following medications—ceftriaxone, paracetamol, topiramate, polyethylene glycol (Picolax), gabapentin, atorvastatin, and dexamethasone—could increase blood pressure?

Medications That Could Increase Blood Pressure

Dexamethasone (dexa) is the primary medication on this list that can significantly increase blood pressure and should be reviewed immediately in a patient with uncontrolled hypertension. 1

High-Risk Medication

Dexamethasone (Corticosteroid)

• Corticosteroids are well-established BP-elevating agents that should be avoided or minimized in patients with uncontrolled hypertension 1
• Mechanism: sodium retention, fluid retention, and activation of mineralocorticoid receptors
• Action required: Consider dose reduction, discontinuation if clinically feasible, or switching to alternative therapy depending on the indication
• If continuation is necessary (e.g., for malignant disease), intensify antihypertensive therapy accordingly 2

Moderate-Risk Medications

Paracetamol (Acetaminophen)

• Recent evidence suggests paracetamol may cause small but measurable BP elevations, particularly with chronic use 3, 4
• Effect appears dose-dependent: higher doses (>2-3 g/day) and prolonged use (>30 days) show greater BP increases 4
• Systolic BP increases range from +0.2 to +4.0 mmHg in clinical trials 4
• However, the clinical significance remains debated: one large UK study found no sustained BP rise in treated hypertensive patients 5
• Practical approach: In a patient with uncontrolled hypertension and nighttime headache, consider limiting paracetamol to lowest effective dose and shortest duration, or explore alternative analgesics 6

Topiramate

• Topiramate typically does NOT raise blood pressure—in fact, it may have neutral or slightly beneficial effects on BP
• The AGA guidelines note that phentermine-topiramate should be avoided in patients with uncontrolled hypertension, but this warning relates to the phentermine component, not topiramate 7
• Topiramate alone is not a BP-elevating medication
• No action needed regarding BP concerns for topiramate monotherapy

Low-Risk/No Concern Medications

Ceftriaxone

• No significant BP-elevating effects documented
• No action needed

Picolax (Polyethylene Glycol-based Bowel Prep)

• No direct BP-elevating effects
• Transient electrolyte shifts possible but not clinically significant for BP in most patients
• No action needed

Gabapentin

• Does not increase blood pressure
• May cause peripheral edema but not hypertension
• No action needed

Atorvastatin

• Statins do not elevate blood pressure 8
• Should be continued for cardiovascular risk reduction in hypertensive patients
• No action needed—in fact, continuation is beneficial

Clinical Algorithm for This Patient

For a patient with uncontrolled hypertension and nighttime headache:

1. Immediately address dexamethasone: Determine indication, consider tapering/discontinuation, or intensify antihypertensive therapy if steroid continuation is essential

2. Optimize paracetamol use: Limit to <2 g/day if possible, use shortest duration, monitor BP response 4, 6

3. Continue topiramate, gabapentin, atorvastatin: These are not contributing to BP elevation

4. Investigate the nighttime headache: The headache itself warrants evaluation for secondary causes of hypertension (e.g., pheochromocytoma, sleep apnea) rather than assuming it's medication-related 9

5. Intensify antihypertensive regimen per current guidelines: Target BP <130/80 mmHg using combination therapy (ACE-I/ARB + CCB + thiazide-like diuretic) 10, 2

Common Pitfall to Avoid

Do not assume all analgesics equally affect BP. While NSAIDs are well-established BP elevators, paracetamol's effects are more modest and controversial 11, 12. The corticosteroid (dexamethasone) is the clear priority for intervention in this medication list.