Sildoo 4 Capsule

Reviewed By Dr. Mekhala Chandra, MD, MBBS

Last updated on 09 Mar 2026 | 10:46 AM (IST)

Sildoo 4 Capsule is an alpha-adrenergic antagonist that is used in the treatment of benign prostatic hyperplasia. It helps to relieve symptoms like difficulty in passing urine. However, it does not decrease the size of the prostate.

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General Information

Contains

Silodosin (4mg)

Marketer

Dr Reddy's Laboratories Ltd

Storage

Store below 30°C

The content is shown in English

Product introduction

Sildoo 4 Capsule is advised to take it in a dose and duration as per prescription. It should be taken with food, but take at the same time regularly. Swallow the medicine as a whole without crushing or chewing it. You should not stop taking the medicine without consulting the doctor as it may lead to the worsening of your symptoms. The course of the treatment should be completed for better efficacy of the medicine.

Some common side effects of this medicine are retrograde ejaculation, dizziness, diarrhea, orthostatic hypotension, headache, and nasal congestion. If any of the side effects persist or bother you, you must consult the doctor without delay.

Simple lifestyle changes can help you manage your symptoms better. Try to urinate as soon as you feel the urge, however, never strain or push to empty your bladder. You should avoid drinking caffeinated or alcoholic drinks at night and a few hours before going to bed or going out.

Before receiving the treatment, inform your doctor if you are on any medication for any other health condition. If you have to undergo eye surgery due to cataracts or glaucoma then inform your eye doctor about the usage of this medicine. Patients with liver or kidney disease must be cautious while receiving the prescription, and they must receive regular follow-ups as per the doctor’s advice.

Uses of Sildoo Capsule

Treatment of Benign prostatic hyperplasia

Benefits of Sildoo Capsule

Treatment of Benign prostatic hyperplasia
When your prostate gland becomes enlarged it can cause urinary problems such as difficulty passing urine and the need to go to the toilet frequently or urgently. It can also cause urine flow to be slower. If not treated, there is a risk that your urine flow will be completely blocked. Sildoo 4 Capsule works by relaxing muscles in the bladder and prostate. So, it can rapidly relieve the symptoms and make it easier for you to urinate. Take this medicine exactly as prescribed for maximum benefits.

Side effects of Sildoo Capsule

Most side effects do not require any medical attention and disappear as your body adjusts to the medicine. Consult your doctor if they persist or if you’re worried about them

Common side effects of Sildoo

Dizziness
Hypotension (low blood pressure)
Nasal congestion (stuffy nose)
Diarrhea

How to use Sildoo Capsule

Take this medicine in the dose and duration as advised by your doctor. Sildoo 4 Capsule should be taken with or after food.

How Sildoo Capsule works

Sildoo 4 Capsule is an alpha blocker. It works by relaxing muscle around the bladder exit and prostate gland so urine is passed more easily.

All substitutes for Sildoo 4 Capsule

For information purposes only. Consult a doctor before taking any medicine.

Quick tips

Sildoo 4 Capsule helps in relieving the symptoms of enlarged prostate. It does not decrease the size of the prostate.
Sildoo 4 Capsule must be taken with food.
You will feel better within hours or days of starting the treatment. Full effect is usually seen within 2 weeks.
Sildoo 4 Capsule may cause dizziness or sleepiness. Do not drive or do anything requiring concentration until you know how it affects you.
If you are scheduled to undergo an eye surgery due to cataract or glaucoma, inform your eye doctor about the usage of Sildoo 4 Capsule.
Inform your doctor if you have ever been diagnosed with kidney or liver problems.

Safety advice

Alcohol

CONSULT YOUR DOCTOR

It is not known whether it is safe to consume alcohol with Sildoo 4 Capsule. Please consult your doctor.

Pregnancy

CONSULT YOUR DOCTOR

Information regarding the use of Sildoo 4 Capsule during pregnancy is not available. Please consult your doctor.
Sildoo 4 Capsule is not indicated for use in women.

Breast feeding

CONSULT YOUR DOCTOR

Information regarding the use of Sildoo 4 Capsule during breastfeeding is not available. Please consult your doctor.
Sildoo 4 Capsule is not indicated for use in women.

Driving

CAUTION

Sildoo 4 Capsule may cause dizziness or weakness due to changes in blood pressure. Do not drive if these symptoms occur.

Kidney

CAUTION

Sildoo 4 Capsule should be used with caution in patients with severe kidney disease. Dose adjustment may be needed.
Use of Sildoo 4 Capsule is not recommended in patients with severe kidney disease.

Liver

CAUTION

Sildoo 4 Capsule should be used with caution in patients with liver disease. Dose adjustment may be needed.
Limited information is available on the use of Sildoo 4 Capsule in these patients.

Interaction with drugs

Taking Sildoo with any of the following medicines can modify the effect of either of them and cause some undesirable side effects

Moderate

Sildenafil (Oral Route)

If concurrent use is essential, your doctor may monitor your treatment and adjust the doses as per the observations. It is recommended to lie down if you experience symptoms such as headache, fatigue, sweating or dizziness until they fade away and consult your doctor.

Moderate

Dapoxetine (Oral Route)

Monitor your blood pressure regularly and talk to your doctor if you notice any unusual symptoms. Your doctor may adjust the dose if required.

Moderate

Tadalafil (Oral Route)

Moderate

Bortezomib (Injection Route)

Your doctor may monitor blood pressure and adjust the dose, if required.

Moderate

Thalidomide (Oral Route)

watch out for symptoms such as breathlessness, fatigue, drowsiness, sedation or faintness or vomiting and consult your doctor if you experience them. They may monitor and adjust the doses as per the observations.

Frequently asked questions

What is Sildoo 4 Capsule used for?

Sildoo 4 Capsule is a medicine given for the treatment of difficulty in urination, urinary dribbling, a strong urge to urination, and frequent urination during the night. It is also used to relieve other symptoms associated with benign enlargement of the prostate gland. It works by reducing the tension in the muscles of the urinary tract like the prostate gland and urethra. It facilitates an easier flow of urine through the urethra, and hence, is very useful in men with difficulty of urination.

When should I take Sildoo 4 Capsule?

It is usually advised to take the dose of Sildoo 4 Capsule daily with a meal. Prefer taking it at the same time of the day. In patients with any kidney impairment, the dose is reduced by the doctor. Patients who are unable to swallow the capsules can open the capsule and sprinkle the powder on a tablespoon of apple sauce. Consume this mixture immediately within 5 minutes without chewing and drink a glass of cool water immediately afterwards.

Can I undergo cataract surgery while taking Sildoo 4 Capsule?

In some cases, Sildoo 4 Capsule has shown specific side effect on the eyes. It has been observed that during an eye surgery the iris tends to get floppy and pupil size becomes small in patients taking Sildoo 4 Capsule. This makes the operation difficult and tedious. Hence, you should always inform your eye specialist about any history related to the use of Sildoo 4 Capsule. Also, the doctor should be informed about all the medication that you are on before starting the treatment.

Can Sildoo 4 Capsule cause erectile dysfunction?

Sildoo 4 Capsule usually does not affect erectile function. However, Sildoo 4 Capsule may cause other sexual problems like ejaculatory dysfunction and failure to ejaculate. If you experience any side effects or uneasiness while taking this medication, contact your doctor immediately.

Does Sildoo 4 Capsule lower blood pressure?

Yes, Sildoo 4 Capsule may cause a drop in blood pressure. This most commonly occurs while taking the first dose of this medicine. Hence, you should be cautious while driving, operating any machinery, or doing any important work during the initial days of treatment. Consult your doctor before you start taking this medication.

Can I take sildenafil while taking Sildoo 4 Capsule?

You must consult your doctor before you start taking these medications. Sildoo 4 Capsule can sometimes cause low blood pressure and fainting. Taking sildenafil along with Sildoo 4 Capsule can further deteriorate the condition. It could also lead to increased chances of drop in blood pressure in a few sensitive patients. As a result, there could be increase in chances of fainting which could be dangerous.

Fact Box

Chemical Class

Indolecarboxamide derivative

Habit Forming

Therapeutic Class

UROLOGY

Action Class

Uroselective Adrenergic Receptor(α1a) Antagonists

References

Westfall TC, WestfallIn DP. Adrenergic Agonists and Antagonists. In: Brunton LL, Chabner BA, Knollmann BC, editors. Goodman & Gilman’s: The Pharmacological Basis of Therapeutics. 12th ed. New York, New York: McGraw-Hill Medical; 2011. p. 307.
Sildosin. Milan, Italy: Recordati Industria Chimica e Farmaceutica. [Accessed 04 Apr. 2019] (online) Available from:
Silodosin. Corona, California: Watson Laboratories, Inc; 2008 [revised Jan. 2013]. [Accessed 04 Apr. 2019] (online) Available from:
Central Drugs Standard Control Organisation (CDSCO). [Accessed 04 Apr. 2019] (online) Available from:
Silodosin. Summary of Prodyct Characteristics. Recordati Ireland Ltd., Ireland; 2024. [Accessed 11 Sep. 2025] (online) Available from:
Silodosin. Saint Victor, France: Laboratoires Bouchara-Recordati; [Accessed 08 Nov. 2025]. (online). Available from:

User feedback

Patients taking Sildoo 4 Capsule

Once A Day

90%

Twice A Day

10%

What are you using Sildoo Capsule for?

Benign prostatic hyperplasia

78%

Others

22%

How much was the improvement?

Average

78%

Excellent

22%

What were the side-effects while using Sildoo 4 Capsule?

Ejaculation disorder

100%

How do you take Sildoo Capsule?

With or without food

50%

With food

50%

Please rate Sildoo 4 Capsule on price

Average

100%

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Disclaimer

Tata 1mg's sole intention is to ensure that its consumers get information that is expert-reviewed, accurate and trustworthy. However, the information contained herein should NOT be used as a substitute for the advice of a qualified physician. The information provided here is for informational purposes only. This may not cover everything about particular health conditions, lab tests, medicines, all possible side effects, drug interactions, warnings, alerts, etc. Please consult your doctor and discuss all your queries related to any disease or medicine. We intend to support, not replace, the doctor-patient relationship.

Marketer details

Name: Dr Reddy's Laboratories Ltd
Address: Dr. Reddy's Laboratories Ltd., Village Malpur, P.O.Bhud, Baddi, Dist. Solan, H.P.

Vendor Details

Country of origin: India
A licensed vendor partner from your nearest location will deliver Sildoo 4 Capsule. Once the pharmacy accepts your order, the details of the pharmacy will be shared with you. Acceptance of your order is based on the validity of your doctor's ℞ and the availability of this medicine.

In case of any issues, contact us

Email ID: [email protected]
Phone Number: 0124-4166666
Address: 5th Floor Tower - B of the Presidency Building, 46/4 Mehrauli Gurgaon Road, Sector 14, Gurugram, Haryana-122001, India

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Why we need a prescription?

Provide right medicines

Prescriptions are complex documents. We proof read and recheck at various steps to provide you the right medication in the correct form and dose

In accordance with the law

Most medicines cannot be sold without a valid prescription, as per the Drugs and Cosmetics Act, 1940 and Rules, 1945

Sildoo 4 Capsule

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General Information

Contains

Marketer

Storage

Product introduction

Uses of Sildoo Capsule

Benefits of Sildoo Capsule

Side effects of Sildoo Capsule

How to use Sildoo Capsule

How Sildoo Capsule works

All substitutes for Sildoo 4 Capsule

Sildoease 4 Capsule

Siloright 4mg Capsule

Silodal 4 Capsule

Silofast 4 Capsule

Prostagard 4 Capsule

Quick tips

Safety advice

Alcohol

Pregnancy

Breast feeding

Driving

Kidney

Liver

Interaction with drugs

Sildenafil (Oral Route)

Dapoxetine (Oral Route)

Tadalafil (Oral Route)

Bortezomib (Injection Route)

Thalidomide (Oral Route)

Frequently asked questions

What is Sildoo 4 Capsule used for?

When should I take Sildoo 4 Capsule?

Can I undergo cataract surgery while taking Sildoo 4 Capsule?

Can Sildoo 4 Capsule cause erectile dysfunction?

Does Sildoo 4 Capsule lower blood pressure?

Can I take sildenafil while taking Sildoo 4 Capsule?

Fact Box

Chemical Class

Habit Forming

Therapeutic Class

Action Class

References

User feedback

Patients taking Sildoo 4 Capsule

What are you using Sildoo Capsule for?

How much was the improvement?

What were the side-effects while using Sildoo 4 Capsule?

How do you take Sildoo Capsule?

Please rate Sildoo 4 Capsule on price

Want to know more

Have issue with the content

Disclaimer

Marketer details

Vendor Details

In case of any issues, contact us

Lab tests offered by us

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