Practolol and Acarbose: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 11, 2026 · Source data updated Jul 10, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Acarbose
Practolol
No brand names on record
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
You take acarbose to help control your blood sugar, and practolol is a beta-blocker used for the heart. When these two are used together, your blood sugar can shift, sometimes running low and sometimes high.
The bigger thing to know is that beta-blockers can hide some warning signs of low blood sugar. Normally a racing heartbeat is an early clue, and practolol can blunt that. The good news is that other signs, like sweating and dizziness, usually still show up. Your care team can manage this easily by checking your sugar a bit more often and adjusting your dose if needed. Let them know if anything feels off.
Effect: Combined use of an antidiabetic (acarbose) with a beta-blocker (practolol) may alter glycemic control (hypo- or hyperglycemia) and can mask adrenergic warning signs of hypoglycemia.
- Mechanism: Altered glucose metabolism plus beta blockade; blunted tachycardia response. Sweating and dizziness are generally preserved.
- Direction/magnitude: Bidirectional; nonselective beta-blockade can potentiate hypoglycemia and delay glucose recovery. Neither agent is a prodrug here; this is a PD interaction.
- Onset: Delayed. Evidence: Probable. Severity: Moderate.
- Management: Increase glucose monitoring frequency; individualize antidiabetic dosing. On beta-blocker withdrawal, watch for loss of glycemic control.
What happens
Hypoglycemia or hyperglycemia; decreased symptoms of hypoglycemia
Interaction Deep Dive
When antidiabetic medications are taken together with beta-blockers, the result can be either hypoglycemia or hyperglycemia, and the combination may also mask the warning signs of hypoglycemia12. Tachycardia can be influenced, whereas other hypoglycemic indicators like dizziness and sweating are not 6. Insulin-induced hypoglycemia can be intensified by nonselective beta blockers, which may also impair the return of serum glucose to normal levels. In patients who have both heart failure and diabetes, hyperglycemia may deteriorate 7. It may be necessary to monitor glucose more often or to modify the dose of the antidiabetic drug 12. During combined use, watch carefully for hypoglycemia-related signs and symptoms, and should the beta-blocker be discontinued, monitor for a loss of glycemic control 3.
Why it happens (mechanism)
Altered glucose metabolism and beta blockade
How to manage this interaction
Keep taking both medications as prescribed unless your prescriber tells you otherwise. This combination is manageable with a few sensible steps.
- Your care team may check your blood sugar more often to catch highs or lows early.
- Your acarbose dose may be adjusted and individualized by your team based on your readings.
- Remember that a racing heartbeat may be muted, so pay attention to other low-sugar clues like sweating, dizziness, shakiness, or confusion.
- If your practolol is ever stopped, tell your team so they can watch for your sugar climbing.
Raise any unusual symptoms with your pharmacist or prescriber.
Management is individual — confirm any change with your pharmacist or prescriber.
Literature reports
2 reports — tap to read
a) In elderly diabetic patients receiving either insulin or sulfonylureas, the specific antihypertensive agent chosen had minimal impact on the risk of hypoglycemia; however, once other risk factors were accounted for, the lowest risk was associated with cardioselective beta blockers and the highest with non-cardioselective beta blockers, while other antihypertensive drugs fell in between (N=13,559) 4.
b) In patients with hypertension and non-insulin dependent diabetes, beta blockers, though not alpha blockade or ACE inhibitors, produced a worsening of long-term glycemic control. Certain unfavorable effects on the lipid profile were also observed with beta blockade. These effects were particularly pronounced with propranolol. Using an alpha blocker together with the beta blocker prevented the worsening caused by the beta blockade 5.
Common questions
Can I take Practolol and Acarbose together?
Using acarbose with practolol can push your blood sugar up or down and may hide the fast-heartbeat warning of a low. Monitor your sugar more closely and keep your care team informed so they can adjust your dose. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Practolol and Acarbose interaction?
It is rated moderate. Can be significant — usually manageable with monitoring.
How quickly could this interaction happen?
The documented onset is "delayed". Effects tend to build up gradually over days to weeks.
How is the Practolol and Acarbose interaction managed?
Keep taking both medications as prescribed unless your prescriber tells you otherwise. This combination is manageable with a few sensible steps. Your care team may check your blood sugar more often to catch highs or lows early. Your acarbose dose may be adjusted and individualized by your team based on your readings. Remember that a racing heartbeat may be muted, so pay attention to other low-suga… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "probable". Good supporting evidence, though not definitively proven.
Questions for your pharmacist
- Does my dose of Practolol or Acarbose need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there anything you'd monitor while I'm on both?
References (7)
- Product Information: TOUJEO(R) subcutaneous injection, insulin glargine subcutaneous injection. sanofi-aventis (per manufacturer), Bridgewater, NJ, 2015. DailyMed
- Product Information: AMARYL(R) oral tablets, glimepiride oral tablets. Sanofi-Aventis U.S. LLC (per FDA), Bridgewater, NJ, 2013. DailyMed
- Product Information: Glynase(R) PresTab(R) oral micronized tablets, glyburide oral micronized tablets. Pharmacia & Upjohn Co (per FDA), New York, NY, 2013. DailyMed
- Shorr RI, Ray WA, Daugherty JR, et al: Antihypertensives and the risk of serious hypoglycemia in older persons using insulin or sulfonylureas. JAMA 1997; 278:40-43. DOI
- Whitcroft IA, Thomas JM, Rawsthorne A, et al: Effects of alpha and beta adrenoceptor blocking drugs and ACE inhibitors on long term glucose and lipid control in hypertensive non-insulin dependent diabetics. Horm Metab Res Suppl 1990; 22:42-46.
- Product Information: TENORMIN(R) oral tablets, atenolol oral tablets. AstraZeneca Pharmaceuticals LP (per FDA), Wilmington, DE, 2012. DailyMed
- Product Information: COREG CR(R) extended-release oral capsules, carvedilol phosphate extended-release oral capsules. GlaxoSmithKline, Research Triangle Park, NC, 2011. DailyMed
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