Description	Doxazosin Mesylate
SKU	350
Generic For	Cardura
Strength	4mg
Manufacturer	TEVA, UK
Active Ingredient	Doxazosin Mesylate

Product Description

Doxazosin Tab 4mg (Doxazosin Mesylate) – Affordable Cardura Alternative

Doxazosin 4mg tablet comprises of an active pharmaceutical ingredient Doxazosin mesylate, which is a selective antagonist of alpha adrenergic receptor. It is clinically proven for the treatment of hypertension and symptoms of benign prostatic hyperplasia. As an alpha blocker, Doxazosin mesylate acts by calming bladder muscles in men, which helps to improve urinary symptoms. In hypertensive patients, the medicine acts by relaxing blood vessels which is helpful in lowering blood pressure.

What is Doxazosin used for?

Doxazosin is supplied in the form of tablets. These tablets are made for patients with high blood pressure and BPH. Your doctor may also prescribe these 4 mg tablets for another purposes not mentioned in the document.

How does Doxazosin work?

The medicine directly acts on smooth muscles surrounding blood vessels and in the prostate and bladder. Its regular intake dilates arteries and veins, which helps control blood pressure levels. In BPH patients, the medicine enhance the urinary flow by reducing BPH symptoms.

What does Doxazosin contain?

Doxazosin contains Doxazosin mesylate as an active therapeutic component, which falls into the category of drugs known as antihypertensive.

What are the side effects of Doxazosin?

Common side efefcts are as follows:

Palpitations
First dose orthostatic hypotension
Edema
Arrhythmias
Dyspnea
Chest pain
Headache
Fatigue
Weakness
Drowsiness
Depression
Nervousness
Sexual dysfunction
Decreased libido
Priapism, sexual dysfunction
Blurred vision
Epistaxis
Abnormal vision
Intraoperative floppy syndrome
Blurred vision, conjunctivitis
Dermatological issues urticaria
Rash
Flushing
Gout
Arthralgia
Myalgia
Gout

What medications interact with Doxazosin?

Common drug interactions are give below:

Sildenafil
Antihypertensives
Tadalafil
Nitrates
Vardenafil
Sympathomimetics
Estrogens

When should Doxazosin not be used?

Do not use it if you are allergic to antihypertensive agents.

Precautions should be taken while using Doxazosin 4 mg tablets.

Pediatrics
Gastrointestinal narrowing
Liver disorders
Lactation
Geriatric patients

How should Doxazosin be used?

To treat Hypertension, 1 mg daily is the recommended dose for one to two weeks. Additionally, your doctor may increase your daily dose to 2 mg for two more weeks. If tolerated, your doctor may further increase your dose to 4, 8, and 16 mg. The normal dosage range is 2-4 mg.

To treat BPH- 1 mg daily is the suggested dose. Your doctor may may increase to 2 mg and after 4 mg, 8 mg as a single dose daily. 8 mg is the maximum suggested dose. The normal dosage range is 2-4 mg once a day.

How long should you take Doxazosin

Continue taking Doxazosin 4 mg tablets for as long as your doctor prescribes it. Continued use is recommended for maximum benefit.

Missed dose of Doxazosin

Note that do not double the dose to compensate the forgotten one. In case you missed a dose, take it when you remember and go back to your usual dosing schedule. If the time to take the next dose is near, leave the missed dose and take the next dose.

How should Doxazosin be stored?

Keep it where children cannot reach
Store it at room temperature
Do not leave it on a windowsill or in the car. Heat and dampness can destroy some drugs
Avoid placing them in moist places

Precautions

Dosage Instructions

Side Effects

How to Use

Infographics

FAQ

What is doxazosin 4 mg used for and who takes it?

Doxazosin 4 mg is a mid-range therapeutic dose of this alpha-1 receptor blocker, prescribed for patients with hypertension or benign prostatic hyperplasia (H) whose symptoms are insufficiently managed on lower doses. Doxazosin Tab 4mg — generic for Cardura 4mg — is particularly effective for men with moderate to severe H urinary symptoms alongside blood pressure management needs. It is taken once daily and is considered the most commonly used maintenance dose in clinical practice.

How does doxazosin 4 mg control both hypertension and H?

Doxazosin 4 mg offers dual action through alpha-1 receptor blockade in two distinct tissue types. In blood vessels, it reduces vascular smooth muscle tone, lowering peripheral resistance and blood pressure. In the lower urinary tract, it relaxes the prostate, urethra, and bladder neck smooth muscle, reducing urinary obstruction. The 4 mg dose provides more complete receptor blockade than 1–2 mg, delivering stronger blood pressure reduction and greater H symptom relief.

What is the correct way to take doxazosin Tab 4mg?

Doxazosin Tab 4mg is taken once daily at a consistent time. Many patients prefer evening dosing to minimise daytime dizziness; others take it in the morning with breakfast. If you're transitioning from 2 mg, your doctor will have gradually increased the dose to allow your body to adjust. Take the tablet whole with water. Do not skip doses — consistent daily use is essential for sustained blood pressure and H symptom control.

How long does doxazosin 4 mg take to provide full H symptom relief?

At the 4 mg dose, many patients notice improvements in urinary flow and reduced frequency within 2–3 weeks. Full H symptom stabilisation, as measured by validated symptom scores, typically occurs within 4–8 weeks of reaching the 4 mg maintenance dose. Blood pressure reductions are generally evident sooner — within 1–2 weeks. Regular follow-up with your urologist or GP helps confirm whether the 4 mg dose is providing adequate relief or whether further dose adjustment is needed.

Is doxazosin 4 mg safe for men with both H and heart disease?

Doxazosin 4 mg can be used in men with H and concurrent heart disease, but careful selection is required. It is generally considered safe in stable hypertension with cardiovascular disease, but is not recommended for heart failure in current guidelines (the ALLHAT trial showed increased cardiovascular events with alpha-blockers in heart failure). In patients with significant cardiac conditions, the prescribing cardiologist should be consulted before initiating or continuing doxazosin.

Can doxazosin 4 mg cause or worsen low blood pressure?

Yes. Doxazosin 4 mg can cause orthostatic hypotension — a significant drop in blood pressure upon standing — in susceptible patients. This is more pronounced at the 4 mg dose than at lower strengths, particularly after dose escalation from 2 mg. Patients with volume depletion (from diuretic use or inadequate fluid intake), concurrent antihypertensive treatment, or those in hot climates face an elevated risk. Symptoms include dizziness, light-headedness, or fainting on standing.

How does doxazosin 4mg compare to finasteride for H treatment?

Doxazosin 4mg and finasteride treat H via completely different mechanisms. Doxazosin relaxes prostate smooth muscle for rapid symptom relief — typically within weeks. Finasteride reduces prostate size by blocking DHT production, which takes 6–12 months to show full effect. For quick symptom relief, doxazosin is preferred. For long-term prostate size reduction and prevention of H progression, finasteride is used. Many urologists prescribe both drugs together for optimal H management.

Is doxazosin Tab 4mg equivalent to Cardura 4mg?

Yes. Doxazosin Tab 4mg is a generic equivalent of Cardura 4mg, containing doxazosin mesylate 4 mg — the same active ingredient at the same dose. Both are manufactured to regulatory bioequivalence standards, ensuring the same blood pressure and H outcomes. The practical advantage of generic doxazosin Tab 4mg is substantially lower cost, which is meaningful for patients who may need ongoing once-daily treatment for years and are not covered by insurance for brand-name Cardura.

Can I buy doxazosin 4 mg online from a trusted pharmacy?

PremiumRxDrugs.com is a licensed pharmacy supplying doxazosin Tab 4mg at competitive prices to customers in the USA, UK, Australia, and worldwide. We stock authentic manufacturer-sourced medicines with worldwide discreet shipping, free shipping on eligible orders, and a convenient online prescription upload system. For patients needing long-term once-daily doxazosin therapy, PremiumRxDrugs.com offers a cost-effective, reliable alternative to local pharmacy pricing.

Is PremiumRxDrugs.com a safe place to order doxazosin?

Yes. PremiumRxDrugs.com has earned patient trust over more than a decade by supplying authentic, manufacturer-sourced medicines to customers in the USA, UK, Australia, and beyond. We operate as a licensed pharmacy with competitive pricing on both generic and branded cardiovascular medications. Worldwide shipping with discreet packaging, free shipping on qualifying orders, and an easy reorder system ensure long-term H and hypertension management remains both accessible and affordable.

What side effects are specific to the doxazosin 4 mg dose?

At the 4 mg dose, doxazosin's side effects are more pronounced than at lower strengths. Orthostatic dizziness, fatigue, headache, and peripheral edema are the most common complaints at this dose. Retrograde ejaculation (semen entering the bladder during orgasm) is an underreported but notable side effect in men. Intraoperative floppy iris syndrome (IFIS) remains a concern during eye surgery. If any of these side effects significantly affect your daily life, discuss dose adjustment with your doctor.

Are there any medications that should not be combined with doxazosin 4 mg?

Doxazosin 4 mg should not be combined with other alpha-blockers, as this significantly increases hypotension risk. PDE5 inhibitors (sildenafil, tadalafil, vardenafil) used for erectile dysfunction can cause severe blood pressure drops when combined with doxazosin. Cimetidine may slightly increase doxazosin blood levels. Always disclose all medications — including OTC drugs and herbal supplements — to your prescriber before starting or continuing doxazosin at the 4 mg dose.