Sildenafil is used to treat conditions involving male sexual function (impotence or erectile dysfunction-ED). When tandem with sexual stimulation sildenafil acts to help a man get and maintain an erection by increasing blood flow to the penis.

The medicine does not protect against infections that are sexually transmitted (such as Aids, hepatitis B, gonorrhea, syphilis). Practice "good sex" by using condoms made from latex. For more info please contact your doctor or pharmacist.

How to use Sildenafil Tablet

Before you start taking sildenafil citrate, read your pharmacist's patient details leaflet and each time you get a refill. Please ask your doctor or pharmacist if you have any questions.

Typically take this medication by mouth as advised by your doctor, as required, to treat erectile dysfunction-ED. Take sildenafil for at least 30 minutes, but no more than 4 hours, before sexual activity (the most powerful one hour before). Do not take them more than once a day.

A high fat meal can delay the pace with which the drug starts working.

Sildenafil side effects

The Sildenafil oral tablet does not cause drowsiness, but it does cause other side effects.

More common side effects

The more common side effects of sildenafil can include:

  • nosebleeds

  • headaches

  • upset stomach

  • vomiting

  • flushing (reddening and warming of the face)

  • trouble sleeping

  • fever

  • nausea

  • bronchitis

  • sore throat

  • runny nose

  • an erection that lasts longer than normal

  • respiratory infection

If these effects are mild, they may go away within a couple of days or weeks. Talk to the doctor or pharmacist if they are more serious or are not going anywhere.

Serious side effects

  • blurry vision

  • confusion

  • dizziness

  • lightheadedness

  • fainting

  • nausea or vomiting

  • weakness

  • sleepiness

  • Increased shortness of breath or trouble breathing

  • Priapism

  • Vision problems

  • Hearing problems

  • Heart problems,

  • chest pain

  • shortness of breath

  • dizziness

  • trouble speaking

  • confusion

  • nausea or vomiting

  • feeling lightheaded

Medicines affect each person differently, we can not guarantee that all potential side effects are included in these details. Such material does not constitute a replacement for professional advice. Please consult with a healthcare provider who knows your medical background about potential side effects.


Ask your doctor or pharmacist, before taking sildenafil, whether you are allergic to it; or if you have any other allergies. This drug can contain inactive ingredients which may result in allergic reactions or other problems. Call your pharmacist for information.

When taking this drug, notify your doctor or pharmacist about your medical history, in particular about: cardiac attacks (such as heart attack or life-threatening irregular heartbeat in the past 6 months, chest pain / angina, heart failure), stroke in the past 6 months, kidney disease, liver disease, high or low blood pressure, extreme body water loss (dehydration), prostate conditions (such as angulation).

The medication can make you dizzy, or cause problems with your vision. You can get more dizzy by alcohol or marijuana (cannabis). Should not drive, use machinery or do something that needs alertness or clear vision before it is safe to do so. Alcoholic drinks are restricted. If you are taking marijuana (cannabis), speak to your doctor.


Drug reactions can affect the way your drugs function or increase the risk of severe side effects. This paper includes not all potential reactions with the medications. Keep a list of all the medications you use (including prescription and herbal medicines) and share it with your doctor and pharmacist. Should not start, interrupt or adjust the dosage of any drugs without the permission of your doctor.

A drug that may interact with this medication is: riociguat.

Sildenafil, when used with nitrates, can cause a serious drop in your blood pressure. A significant drop in blood pressure can cause dizziness, fainting, and a heart attack or stroke rare. Should not use sildenafil with any of the following: other medicines used to treat chest pain / angina (nitrates such as nitroglycerin, isosorbid), recreational drugs or "poppers" containing amyl nitrate, amyl nitrite, or butyl nitrite.

When you are already taking a drug with an alpha blocker (such as doxazosin, tamsulosin) to treat an enlarged prostate / BPH or high blood pressure, the blood pressure may become too low to cause dizziness or fainting. Your doctor may start a lower dose of sildenafil medication to reduce your risk of low blood pressure.

Other drugs that affect your body 's removal of sildenafil which may affect how sildenafil works. Examples include azole antifungals (such as itraconazole, ketoconazole), macrolide antibiotics (such as clarithromycin, erythromycin), HIV protease inhibitors (such as ritonavir, saquinavir), protease inhibitors of the hepatitis C virus (such as boceprevir, telaprevir), mifepristone, rifampin, and others.

Do not take this drug with any other product that includes sildenafil or other related erectile dysfunction-ED or pulmonary hypertension drugs (such as tadalafil, vardenafil). Buy Sildenafil Citrate API at Avience Chemicals and pharmaceutical at an affordable price.

How to take sildenafil

This does not include all potential dosages and formulations of the drug. Your dose, your medication type, and how frequently you take this medicine will depend on:

  • your age

  • the condition being treated

  • how severe your condition is

  • other medical conditions you have

  • how you react to the first dose