Apo-Atenidone 100/25mg Tablet
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Overview
Apo-Atenidone 100/25mg Tablet is a prescription-only medicine (POM) presented as a tablet, with Atenolol 100mg and Chlortalidone (chlorthalidone) 25mg as its active ingredient content.
This page is limited to product, safety and handling information, in line with Malaysian rules on prescription medicine information for the public. Your prescriber or pharmacist is the right source for anything beyond that, together with the leaflet inside the pack.
Through DoctorOnCall, this product is supplied after an online consultation with a licensed doctor and a valid prescription, and it is checked by a registered pharmacist before dispensing. Take it exactly as prescribed, and speak to your doctor before stopping, changing the dose, or starting any other medicine alongside it.
Directions for Use
Take Apo-Atenidone 100/25mg Tablet once daily in the morning, with or without food. Taking it in the morning helps avoid the need to urinate frequently during the night. Swallow the tablet whole with a glass of water, and do not stop taking it suddenly without consulting your doctor.
Dosage
The usual dose of Apo-Atenidone 100/25mg Tablet is one tablet once daily, taken in the morning. Your doctor will determine whether this combination is appropriate for you and will monitor your blood pressure, kidney function, and blood electrolytes (particularly potassium) periodically during treatment.
Shelf Life
Use this product before the expiry date stated on the packaging. Do not use the medicine if the expiry date has passed.
Storage Instructions
Store below 30°C in a dry place, away from direct sunlight and out of reach of children.
Side Effects
Atenolol
- Dizziness or lightheadedness
- Tiredness or fatigue
- Cold hands and feet
- Slower heart rate
- Nausea
- Shortness of breath in some cases
Chlortalidone
- Increased urination
- Dizziness or light-headedness, especially when standing up
- Low potassium levels (hypokalemia)
- Muscle cramps or weakness
- Increased sensitivity to sunlight
- Gastrointestinal discomfort (nausea or upset stomach)
Contraindications
- Known hypersensitivity to atenolol, chlortalidone, sulfonamide-derived medicines, or any ingredient in this product
- Severe bradycardia (very slow heart rate), sick sinus syndrome, or second/third-degree heart block without a pacemaker
- Uncontrolled heart failure or cardiogenic shock
- Severe asthma or bronchospasm
- Severe kidney impairment or anuria (inability to produce urine)
Drug / Food Interactions
- Other blood-pressure-lowering medicines or calcium channel blockers (e.g. verapamil, diltiazem) may cause an excessive drop in blood pressure or heart rate
- NSAIDs (e.g. ibuprofen) may reduce the blood-pressure-lowering effect and affect kidney function
- Lithium levels may increase due to reduced clearance caused by the diuretic component
- Digoxin combined with low potassium from the diuretic may increase the risk of irregular heart rhythm
Quick Tips
- Take in the morning to reduce nighttime urination
- Do not stop this medicine suddenly – abrupt withdrawal of a beta-blocker can worsen chest pain or raise blood pressure
- Monitor your blood pressure regularly as advised by your doctor
- Attend scheduled blood tests to check your potassium and kidney function
Frequently Asked Questions
Is Apo-Atenidone 100/25mg Tablet a prescription medicine?
Yes. Apo-Atenidone 100/25mg Tablet is a prescription-only medicine (POM). It can only be supplied against a valid prescription written by a registered doctor, and it should be used only by the person named on the prescription label.
What does Apo-Atenidone 100/25mg Tablet contain?
Apo-Atenidone 100/25mg Tablet is supplied as a tablet and contains Atenolol 100mg and Chlortalidone (chlorthalidone) 25mg. The full composition is listed in the Composition section on this page and on the product packaging.
Why is there no information here about what Apo-Atenidone 100/25mg Tablet is for?
Malaysian rules for prescription medicines limit public product pages to product, safety and handling information. Your doctor decides whether this medicine is appropriate for you and will explain it during your consultation, and your pharmacist can answer further questions when the medicine is dispensed.
How should I take Apo-Atenidone 100/25mg Tablet?
Follow your doctor’s instructions and the directions on the dispensing label without changing them. If anything on the label is unclear, check with your pharmacist before taking the first dose, and read the Directions for Use section on this page.
What should I do if I miss a dose?
Take it as soon as you remember, unless your next dose is nearly due. In that case skip the missed dose and carry on with your usual schedule. Never take two doses together to make up for a missed one. If you miss doses often, tell your doctor or pharmacist.
How should I store Apo-Atenidone 100/25mg Tablet?
Store below 30°C in a dry place, away from direct sunlight and out of reach of children. Keep it in the original pack until use, and do not use it after the expiry date printed on the packaging.
What should I do if I notice side effects?
Tell your doctor or pharmacist about any reaction that concerns you, and seek medical care immediately for signs of a severe reaction such as difficulty breathing, swelling of the face, lips or throat, or a widespread rash. Reported reactions are listed in the Side Effects section on this page.
Can I stop taking Apo-Atenidone 100/25mg Tablet on my own?
No. Speak to your doctor before stopping, pausing or changing the dose, even if you feel well or think you no longer need the medicine.
How do I get a prescription for Apo-Atenidone 100/25mg Tablet?
Customers in Malaysia can complete an online consultation with a DoctorOnCall doctor, who decides whether a prescription is appropriate, or upload a valid prescription already issued by their own doctor.
Orders going to Singapore are dispatched from Malaysia as an international delivery, so you need to hold a valid prescription or doctor’s letter for the medicine. Check the consultation and prescription upload options shown at checkout for your delivery address before placing the order.
How long will delivery take?
Within Malaysia, standard delivery takes 3 to 5 working days. Same-day delivery is available in the Klang Valley for orders placed before 12pm; orders placed after 12pm arrive by the end of the next day.
Orders to Singapore are sent as international deliveries and take 5 to 9 working days. A lump-sum shipping and handling fee applies to every overseas delivery and is shown at checkout.
What payment methods can I use?
Customers in Malaysia can pay by FPX online banking, credit or debit card (Visa and Mastercard), and supported e-wallets including Touch ‘n Go eWallet, GrabPay and ShopeePay.
FPX and local e-wallets are tied to Malaysian bank and wallet accounts, so if your delivery address is in Singapore, use the payment options displayed at checkout for that address rather than assuming the same list applies.
Can Apo-Atenidone 100/25mg Tablet be delivered to Singapore?
Yes. DoctorOnCall ships to Singapore as an international order dispatched from Malaysia, arriving in 5 to 9 working days with a lump-sum shipping and handling fee.
Singapore’s Health Sciences Authority (HSA) allows personal imports of up to three months’ supply of a medicine for your own use or an immediate family member’s, as long as it contains no controlled drugs, psychotropic substances or prohibited items. Keep the product in its original labelled packaging and keep a copy of your prescription or doctor’s letter with it. Quantities above three months’ supply, and medicines containing controlled substances, require prior HSA approval.
Is Apo-Atenidone 100/25mg Tablet registered with the authorities?
Products listed on DoctorOnCall are registered with Malaysia’s Ministry of Health for supply in Malaysia, and each pack carries its MAL registration number.
An order delivered to Singapore arrives as a personal import of a Malaysia-registered product; HSA product registration is not required for personal-use quantities, but it is also not the same as a product registered for sale in Singapore. If you need a locally registered Singapore product, buy it from a pharmacy in Singapore.
Who do I contact if there is a problem with my order?
DoctorOnCall’s customer care team handles order, delivery and product queries through the contact channels on the site, including WhatsApp and the online help centre.
For deliveries to Singapore, allow more time before chasing an order than you would for a local Malaysian delivery, as the parcel passes through customs clearance and tracking updates can appear later in the journey.
Ingredients / Active Ingredients
- Atenolol 100mg
- Chlortalidone (chlorthalidone) 25mg
Safety Advice
Atenolol
Pregnancy
This medicine should be used cautiously during pregnancy. Monitoring may be required.
Breastfeeding
Use with caution. Monitor infant for potential adverse reactions.
Kidney
Use cautiously. Dose adjustment or monitoring may be required.
Liver
Use cautiously. Liver function monitoring may be required.
Alcohol
Caution is advised when consuming alcohol with this medicine.
Driving
Use caution while driving until you know how this medicine affects you.
Chlortalidone
Pregnancy
This medicine should only be used during pregnancy if prescribed by a doctor after careful evaluation.
Breastfeeding
Use with caution. Monitor infant for potential adverse reactions.
Kidney
Use cautiously. Dose adjustment or monitoring may be required.
Liver
Use cautiously. Liver function monitoring may be required.
Alcohol
Caution is advised when consuming alcohol with this medicine.
Driving
Use caution while driving until you know how this medicine affects you.
