Prescription requiredAntihypertensive

Tenoric 25 Tablet — Side Effects & Warnings

Known side effects of Tenoric 25 Tablet include Dizziness, fatigue, slow heart rate (bradycardia), low blood pressure, headache, cold extremities, nausea, increased urination, electrolyte imbalance (low potassium/low sodium), increased uric acid, i.... Not everyone experiences these side effects.

Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated July 2026

Common Side Effects

Dizziness
fatigue
slow heart rate (bradycardia)
low blood pressure
headache
cold extremities
nausea
increased urination
electrolyte imbalance (low potassium/low sodium)
increased uric acid
increased blood sugar

This is not an exhaustive list. Consult your doctor if you notice any unusual symptoms.

Important Warnings

Use with caution in asthma/COPD (may worsen bronchospasm), diabetes (may mask hypoglycaemia symptoms), thyroid disease (may mask thyrotoxicosis), peripheral vascular disease, and in the elderly. Avoid abrupt discontinuation (risk of angina/arrhythmias). Monitor BP, pulse, kidney function, and electrolytes (especially potassium and sodium). Use caution in kidney impairment and in patients with gout/hyperuricaemia. Not recommended in severe bradycardia, 2nd/3rd degree heart block, cardiogenic shock, severe uncontrolled heart failure, or severe hypotension unless directed by a physician.

Drug Interactions

Tenoric 25 Tablet may interact with the following:

Other antihypertensives (additive hypotension)
verapamil/diltiazem/amiodarone/digoxin (increased risk of bradycardia/heart block)
clonidine (rebound hypertension on withdrawal)
NSAIDs (reduced antihypertensive/diuretic effect)
lithium (increased lithium levels/toxicity)
insulin/oral antidiabetics (masked hypoglycaemia)
corticosteroids and amphotericin B (increased risk of hypokalaemia)
alcohol (increased dizziness)
ACE inhibitors/ARBs (additive BP lowering
monitor potassium/renal function)

Always tell your doctor about all medicines you are taking, including over-the-counter drugs and supplements.

Pregnancy Safety

Not recommended; use only if clearly needed and prescribed (may affect foetal growth and neonatal heart rate/blood sugar).

Alcohol Interaction

Use with caution; alcohol may increase dizziness and risk of low blood pressure.

Habit Forming

Storage

Store below 25°C in a dry place, protected from light and moisture. Keep out of reach of children.

Tenoric 25 Tablet — Safety Summary

Composition: Atenolol (25mg) + Chlorthalidone (12.5mg)
Prescription: Required (Rx)
Pregnancy: Not recommended; use only if clearly needed and prescribed (may affect foetal growth and neonatal heart rate/blood sugar).
Alcohol: Use with caution; alcohol may increase dizziness and risk of low blood pressure.
Habit forming: No

Tenoric 25 Tablet — Safety FAQs

What should I do if I experience side effects?

Mild side effects often resolve on their own. If side effects are severe or persistent, stop the medicine and consult your doctor immediately.

Are all listed side effects common?

No. Some side effects are common while others are rare. Not everyone experiences side effects. Consult your doctor if you are concerned.

Can I take this medicine with other drugs?

Some medicines interact with each other. Always inform your doctor about all medicines you are currently taking.

When should I seek emergency help?

Seek immediate medical attention if you experience severe allergic reactions (difficulty breathing, swelling of face/throat), chest pain, or any life-threatening symptoms.

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Safety disclaimer

This information is for educational purposes only and is not a substitute for professional medical advice. If you experience severe side effects, seek medical attention immediately.

Tenoric 25 Tablet — Side Effects & Warnings

Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated July 2026