Dayfil Tablet

Sildenafil (20mg)

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Dayfil Tablet is a medicine used to treat high blood pressure in the blood vessels that supply the lungs (pulmonary arterial hypertension). It works by relaxing blood vessels, improving blood flow, reducing strain on the heart, and easing symptoms like breathlessness.

Written By Dr. Lipika Khurana, PGDHHM, BDS,
Reviewed By Dr. Rajeev Sharma, MBA, MBBS,
Last updated on 25 Nov 2025 | 03:05 PM (IST)

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General Information

Contains

Sildenafil (20mg)

Marketer

CIMS Pharmaceuticals LLP

Storage

Store below 25°C

The content is shown in English

Product introduction

Dayfil Tablet may be taken on an empty stomach or with a meal, but it should be taken at a fixed time each day. The dose and duration will be decided by your doctor so that you get the right amount to control your symptoms. Follow the advice of your doctor. It is important to take this medicine regularly and for as long as you are advised, even if you feel well. Missing doses may lead to the worsening of your condition.

The most common side effects of this medicine include flushing, headache, muscle pain, diarrhea, pain in limbs, back pain, and blurred vision. If they bother you or if you experience any other side effects, talk to your doctor. They may be able to help you reduce or prevent the side effects.

This medicine can be dangerous to take along with medicines called nitrates (often given for chest pain). Do not take this medicine if you have severe heart or liver problems, if you have recently had a stroke or heart attack, or if you have low blood pressure. Let your doctor know if you suffer from these or any other health problems. Pregnant or breastfeeding women should also consult their doctor before taking it. Avoid drinking alcohol while taking this medicine, as it increases the chances of side effects.

Uses of Dayfil Tablet

Treatment of Pulmonary arterial hypertension (PAH)

Benefits of Dayfil Tablet

Treatment of Pulmonary arterial hypertension (PAH)
Pulmonary arterial hypertension (PAH) can cause shortness of breath, tiredness, dizziness, chest pain and swelling in your ankles and legs. It is caused by thickening of walls of the arteries that supply your lungs making it hard for blood to get through. Dayfil Tablet relaxes and widens blood vessels in the lungs. This helps reduce the strain on the heart and improves blood flow, leading to lowered blood pressure in the pulmonary arteries. By easing the workload on the heart and enhancing circulation, Dayfil Tablet can improve exercise capacity, reduce symptoms like shortness of breath and fatigue, and enhance the overall quality of life for individuals with PAH.

Side effects of Dayfil Tablet

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 Dayfil

Flushing (sense of warmth in the face, ears, neck and trunk)
Headache
Blurred vision
Muscle pain
Diarrhea
Indigestion
Limb pain

How to use Dayfil Tablet

Take this medicine in the dose and duration as advised by your doctor. Swallow it as a whole. Do not chew, crush or break it. Dayfil Tablet may be taken with or without food.

How Dayfil Tablet works

Dayfil Tablet is a phosphodiesterase (PDE-5) inhibitor. It works by relaxing the blood vessels in your lungs, thereby reducing the high blood pressure in the lungs. This allows your heart to work less to pump blood into your lungs.

All substitutes for Dayfil Tablet

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

Quick tips

When taken regularly, Dayfil Tablet can help improve your quality of life and exercise ability.
Do not use other medicines (nitrates or nitroglycerin) when taking Dayfil Tablet, as it could drop your blood pressure to a dangerous level.
Do not consume alcohol while taking Dayfil Tablet, as that may increase the blood pressure-lowering effects of Dayfil Tablet.
Stop taking Dayfil Tablet and immediately inform your doctor if you notice a loss of vision in one or both eyes or sudden loss of hearing with a ringing sensation in your ear.
Do not stop taking the medication suddenly without talking to your doctor, as that may lead to a worsening of your symptoms.

Safety advice

Alcohol

UNSAFE

It is unsafe to consume alcohol with Dayfil Tablet

Pregnancy

CONSULT YOUR DOCTOR

The safety of Dayfil Tablet during pregnancy has not been established. There are no adequate and well-controlled studies in pregnant women, and animal data on reproductive toxicity are insufficient. Your doctor will weigh the benefits and any potential risks before prescribing.
Use of Dayfil Tablet is not indicated in women.

Breast feeding

CAUTION

Dayfil Tablet should be used with caution during breastfeeding. Breastfeeding should be held until the treatment of the mother is completed and the drug is eliminated from the body.
Use of Dayfil Tablet is not indicated in women.

Driving

UNSAFE

Dayfil Tablet may decrease alertness, affect your vision, or make you feel sleepy and dizzy. Do not drive if these symptoms occur.

Kidney

SAFE IF PRESCRIBED

Dayfil Tablet is safe to use in patients with kidney disease. No dose adjustment is recommended.
However, inform your doctor if you have any underlying kidney disease. A lowering of dose may be considered if it is not well-tolerated.

Liver

CAUTION

Dayfil Tablet should be used with caution in patients with severe liver disease. Dose adjustment may be needed.

Interaction with drugs

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

Life-threatening

Ranolazine (Oral Route)

Do not consume Ranolazine with Sildenafil.

Life-threatening

Chlorpromazine (Oral Route)

Do not consume Chlorpromazine with Sildenafil. Concomitant use may affect heart rhythm and can be fatal.

Life-threatening

Amiodarone (Oral Route)

Do not consume Amiodarone with Sildenafil.

Life-threatening

Escitalopram Oxalate (Oral Route)

Do not consume Escitalopram Oxalate with Sildenafil.

Life-threatening

Pimozide (Oral Route)

Do not consume Pimozide with Sildenafil.

Frequently asked questions

Can I take Dayfil Tablet for the rest of my life?

Dayfil Tablet is a prescription medicine and should only be taken for the duration that is advised by your doctor.

Why is the use of Dayfil Tablet contraindicated with nitrates?

Use of Dayfil Tablet is harmful for patients taking nitrates or blood pressure-lowering medicines, as their combined use can cause a severe fall in blood pressure, which can also result in death.

Why does Dayfil Tablet cause a fall in blood pressure (hypotension)?

Dayfil Tablet has the property of relaxing the smooth muscle of the blood vessels and widening them, which can cause a fall in blood pressure (hypotension). So, when used with blood pressure-lowering medicines or nitrates, it can cause a severe fall in blood pressure, which could be fatal. Dayfil Tablet should not be taken if you are taking nitrates for chest pain or you have a history of heart attack or stroke in the past 6 months.

Is Dayfil Tablet safe to use in patients with diabetes?

Yes, if prescribed by your doctor, then Dayfil Tablet is safe to use in patients with diabetes.

Fact Box

Chemical Class

Benzenesulfonamide Derivative

Habit Forming

Therapeutic Class

CARDIAC

Action Class

Phosphodiesterase-V (PDE-5) Inhibitors

References

Michel T, Hoffman BB. Treatment of Myocardial Ischemia and Hypertension. 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. pp. 752-53.
Katzung BG, Chatterjee K. Vasodilator & the Treatment of Angina Pectoris. In: Katzung BG, Masters SB, Trevor AJ, editors. Basic and Clinical Pharmacology. 11th ed. New Delhi, India: Tata McGraw Hill Education Private Limited; 2009. p. 197.
Briggs GG, Freeman RK, editors. A Reference Guide to Fetal and Neonatal Risk: Drugs in Pregnancy and Lactation. 10th ed. Philadelphia, PA: Wolters Kluwer Health; 2015. pp. 1261-62.
Sildenafil [Prescribing Information]. New York, New York: Pfizer; 2014]. [Accessed 02 May 2025] (online) Available from:
Sildenafil [Prescribing Information]. Piscataway, NJ: Hetero Labs Limited; 2024. [Accessed 17 Mar. 2025] (online) Available from:

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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: CIMS Pharmaceuticals LLP
Address: DOOR NO:70/619,NIVYA NAGAR,LFC ROAD KALOOR PO,COCHIN COCHIN Ernakulam KL 682017 IN

Vendor Details

Country of origin: India

Lab tests offered by us

Why we need a prescription?

Dayfil Tablet

Save more with additional offers

General Information

Contains

Marketer

Storage

Product introduction

Uses of Dayfil Tablet

Benefits of Dayfil Tablet

Side effects of Dayfil Tablet

How to use Dayfil Tablet

How Dayfil Tablet works

All substitutes for Dayfil Tablet

PAH 20 Tablet

Vasosure Tablet

Assurans Tablet

Pulmoday 20mg Tablet

Quick tips

Safety advice

Alcohol

Pregnancy

Breast feeding

Driving

Kidney

Liver

Interaction with drugs

Ranolazine (Oral Route)

Chlorpromazine (Oral Route)

Amiodarone (Oral Route)

Escitalopram Oxalate (Oral Route)

Pimozide (Oral Route)

Frequently asked questions

Can I take Dayfil Tablet for the rest of my life?

Why is the use of Dayfil Tablet contraindicated with nitrates?

Why does Dayfil Tablet cause a fall in blood pressure (hypotension)?

Is Dayfil Tablet safe to use in patients with diabetes?

Fact Box

Chemical Class

Habit Forming

Therapeutic Class

Action Class

References

Want to know more

Have issue with the content

Disclaimer

Marketer details

Vendor Details

Lab tests offered by us

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