Harnal Ocas 400mcg Tablet
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Prescription Required
Overview
Harnal Ocas 400mcg Tablet contains tamsulosin hydrochloride 400mcg in a modified-release (OCAS – Oral Controlled Absorption System) formulation, an alpha-1A selective adrenergic blocker used to relieve the urinary symptoms of benign prostatic hyperplasia (BPH), a non-cancerous enlargement of the prostate gland in men.
Tamsulosin works by selectively relaxing the smooth muscle in the prostate and bladder neck, which reduces resistance to urine flow and eases symptoms such as difficulty starting urination, weak stream, and the frequent urge to urinate.
How it Works
Tamsulosin selectively blocks alpha-1A adrenergic receptors, which are concentrated in the smooth muscle of the prostate gland and bladder neck. By blocking these receptors, the muscle relaxes, reducing resistance around the urethra and making it easier for urine to pass, without significantly affecting the smooth muscle of blood vessels elsewhere in the body.
Directions for Use
Take Harnal Ocas 400mcg Tablet once daily, after breakfast or the first meal of the day, at approximately the same time each day. Swallow the tablet whole with a glass of water – do not crush, chew, or break it, as this is a modified-release formulation designed to release the medicine slowly over the day.
Dosage
The usual dose of Harnal Ocas 400mcg Tablet is one tablet (400mcg) once daily, taken after the same meal each day. Your doctor will confirm the correct dose and duration of treatment based on your symptoms and response.
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
- Dizziness or lightheadedness
- Runny or stuffy nose
- Ejaculation problems
- Headache
- Weakness or fatigue
- Upset stomach
- Back pain
Contraindications
- Known hypersensitivity to tamsulosin or any ingredient in this product
- History of orthostatic (postural) hypotension
- Severe liver impairment
- Use is not applicable in women or children, as this medicine is indicated only for BPH in men
Drug / Food Interactions
- Other alpha-blockers may cause additive blood-pressure-lowering effects and should generally not be combined
- PDE5 inhibitors (e.g. sildenafil, tadalafil) taken together can increase the risk of low blood pressure and dizziness
- Strong CYP3A4 inhibitors (e.g. ketoconazole, ritonavir) may increase tamsulosin blood levels
- Warfarin’s effect may require closer monitoring if combined with tamsulosin
Quick Tips
- Tell your ophthalmologist that you take this medicine before any cataract or other eye surgery, as it can cause intraoperative floppy iris syndrome (IFIS)
- Rise slowly from sitting or lying down, especially with the first few doses, to reduce dizziness or fainting
- Take after the same meal each day for consistent absorption
- Do not crush or chew the tablet – swallow it whole
- Tell your doctor if you are also taking medicines for erectile dysfunction, as the combination can increase the risk of low blood pressure
Frequently Asked Questions
What is Harnal Ocas 400mcg Tablet used for?
Harnal Ocas 400mcg Tablet is used to relieve urinary symptoms caused by an enlarged prostate (benign prostatic hyperplasia), such as difficulty starting urination, weak urine stream, and frequent urination.
Why must I tell my eye doctor I am taking this medicine before cataract surgery?
Tamsulosin can cause a condition called intraoperative floppy iris syndrome (IFIS) during cataract surgery, which can make the surgery more complex. Always inform your ophthalmologist that you take this medicine before any eye surgery is scheduled.
Can this medicine cause dizziness?
Yes, tamsulosin can cause dizziness or light-headedness, particularly when standing up quickly, due to its blood-pressure-lowering effect on smooth muscle. Rising slowly can help reduce this risk.
Can I take this with medicines for erectile dysfunction?
PDE5 inhibitors such as sildenafil or tadalafil can have an additive blood-pressure-lowering effect when combined with tamsulosin. Discuss this combination with your doctor before use.
What should I do if I miss a dose of Harnal Ocas 400mcg Tablet?
Take the missed dose as soon as you remember with a meal, unless it is almost time for your next dose – in that case, skip the missed dose and continue your regular schedule. Do not double the dose.
Can I buy Harnal Ocas 400mcg Tablet from DoctorOnCall?
Yes, Harnal Ocas 400mcg Tablet is available through DoctorOnCall, a licensed online pharmacy serving our Malaysian and Singaporean customers. As this is a prescription medicine, you will need to complete an online consultation so a doctor can assess your suitability and issue a valid prescription before the order is processed. This ensures the medicine is appropriate for your condition and used under proper medical supervision, whether you are ordering from Malaysia or Singapore.
Is the medication provided by DoctorOnCall genuine and safe to use?
DoctorOnCall sources its medicines through appropriate licensed pharmacy supply channels for our Malaysian and Singaporean customers. All orders are dispensed and checked by a registered pharmacist before delivery. Always use Harnal Ocas 400mcg Tablet according to your doctor’s instructions and the information provided with the product.
What payment methods does DoctorOnCall accept?
We accept payment via Online Banking, Credit Card, and e-Wallets (Boost, GrabPay) for our Malaysian and Singaporean customers, so you can choose whichever method is most convenient for you at checkout.
Does DoctorOnCall provide an installment payment plan for Harnal Ocas 400mcg Tablet?
DoctorOnCall provides an installment payment plan for eligible Malaysian and Singaporean customers, where applicable. Available plans, eligibility, and terms can vary by market, so please contact DoctorOnCall Customer Service for the latest information on installment options for your order.
Is delivery free, and how much does shipping for Harnal Ocas 400mcg Tablet cost?
Delivery charges may vary for our Malaysian and Singaporean customers depending on your delivery location and the applicable order terms at the time of purchase. For the most accurate and up-to-date delivery fee information, please contact DoctorOnCall Customer Service before placing your order.
How long does delivery take for Harnal Ocas 400mcg Tablet?
Our Malaysian customers can generally expect delivery within 3-5 working days, while our Singaporean customers generally receive their orders within 5-7 working days. These are expected timeframes rather than guarantees, and actual delivery time may vary depending on your delivery location, order processing time, courier operations, and whether the order falls on a weekend or public holiday.
What is DoctorOnCall’s shipping, return, or cancellation policy for Harnal Ocas 400mcg Tablet?
Shipping, return, and cancellation terms may vary for our Malaysian and Singaporean customers depending on the product and your order details. Please refer to DoctorOnCall’s Shipping & Delivery Policy and Return, Refund & Exchange Policy, or contact Customer Service, for the specific terms that apply to your order.
Ingredients / Active Ingredients
- Tamsulosin hydrochloride 400mcg (modified-release)
Safety Advice
Pregnancy
Limited information is available regarding use during pregnancy. Use only if clearly needed.
Breastfeeding
Limited data on excretion in breast milk. Consult a doctor before use.
Kidney
Use cautiously. Dose adjustment or monitoring may be required.
Liver
Limited data available in liver disease patients.
Alcohol
Caution is advised when consuming alcohol with this medicine.
Driving
It is not advisable to drive if you experience side effects from this medicine.
Medical Review
