Follow the directions on the prescription label.

The dose is usually taken 1 hour before sexual activity. You should not take the dose more than once per day. Do not take your medication more often than directed. Talk to your care team about the use of this medication in children. This medication is not used in children for this condition. Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once. NOTE: This medicine is only for you. Do not share this medicine with others.

• Sildenafil citrate 100mg tablets are used globally for erectile treatment.
• The medication’s onset of action is typically within 30-60 minutes.
• Patients should avoid heavy or greasy foods before taking sildenafil.
• Do not consume alcohol as it can impair the effectiveness.
• Sildenafil does not cure erectile dysfunction but helps manage symptoms.
• Always take medication exactly as your doctor directs.
• Side effects can include dizziness, flushing, and nasal congestion.
• Check with your doctor if you are on other medications for safety.
• The medication is not suitable for patients with eye conditions like retinitis pigmentosa.
• Use sildenafil responsibly to prevent misuse or adverse health effects.
• Be aware of and report any persistent pain or changes in vision.
• Keep all medical appointments to monitor treatment progress.

Do not take this medication with any of the following: Nitrates, such as amyl nitrite, isosorbide dinitrate, isosorbide mononitrate, nitroglycerin This medication may also interact with the following: Other medications may affect the way this medication works.

5.8 Effects on Bleeding

Talk to your doctor if you are using marijuana (cannabis). Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). During pregnancy, sildenafil should be used only when clearly needed. Since high blood pressure in the lungs is a serious condition that can harm both a pregnant woman and her unborn baby, do not stop taking this medication unless directed by your doctor. If you are planning pregnancy, become pregnant, or think you may be pregnant, discuss with your doctor right away the benefits and risks of using this medication during pregnancy.

Dosage Forms & Strengths

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval. Some products that may interact with this drug are: Sildenafil can cause a serious drop in your blood pressure when used with nitrates.

Common Side Effects

A serious drop in blood pressure can lead to dizziness, fainting, and rarely heart attack or stroke. Do not use sildenafil with any of the following: certain drugs used to treat chest pain/angina (nitrates such as nitroglycerin, isosorbide) recreational drugs called "poppers" containing amyl or butyl nitrite If you are also taking an alpha blocker medication (such as doxazosin, tamsulosin) to treat an enlarged prostate/BPH or high blood pressure, your blood pressure may get too low which can lead to dizziness or fainting. Your doctor may start treatment with a lower dose of sildenafil to minimize your risk of low blood pressure. Other medications can affect the removal of sildenafil from your body, which may affect how sildenafil works. Examples include azole antifungals (such as itraconazole, ketoconazole), macrolide antibiotics (such as clarithromycin, erythromycin), mifepristone, rifampin, ritonavir, among others. Talk with your care team about all of the medications you take. They may suggest changes to your treatment plan to lower the risk of side effects and to make sure your medications work as intended. This list may not describe all possible interactions.

Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine. Visit your care team for regular checks on your progress. Tell your care team if your symptoms do not start to get better or if they get worse.

What happens if I overdose?

Do not take this medication with any other product that contains sildenafil or other similar medications for erectile dysfunction-ED or pulmonary hypertension (such as tadalafil, vardenafil). If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call 1-800-222-1222. Canada residents can call 1-844-764-7669.

How does sildenafil work (mechanism of action)?

Symptoms of overdose may include: severe dizziness, fainting, painful/prolonged erection. Do not share this medication with others. Store at room temperature away from light and moisture. Keep all medications away from children and pets. Do not flush medications down the toilet or pour them into a drain unless instructed to do so.

Pregnancy Categories

Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company. HOW TO USE THIS INFORMATION: This is a summary and does NOT have all possible information about this product. This information does not assure that this product is safe, effective, or appropriate for you. This information is not individual medical advice and does not substitute for the advice of your health care professional. Tell your care team right away if you have any change in your eyesight or hearing. This medication may affect your coordination, reaction time, or judgment.

ED treatment options

Always ask your health care professional for complete information about this product and your specific health needs. Selected from NATIONAL DRUG DATA FILE (NDDF) data included with permission and copyrighted by First Databank, Inc., 2019. This copyrighted material sildenafil citrate sublingual tablets 100mg has been downloaded from a licensed data provider. The above information is intended to supplement, not substitute for, the expertise and judgment of your health care professional. You should consult your health care professional before taking any drug, changing your diet, or commencing or discontinuing any course of treatment.

How can I tell if Viagra’s not working?

Sildenafil is a treatment for erectile dysfunction. It works by increasing blood flow to your penis. The brand name for this medication is Viagra®. Cleveland Clinic is a non-profit academic medical center. Advertising on our site helps support our mission.

Effective treatments, trusted by over 500,000 men

We do not endorse non-Cleveland Clinic products or services. SILDENAFIL (sil DEN a fil) treats erectile dysfunction (ED). It works by increasing blood flow to the penis, which helps to maintain an erection. This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions. They need to know if you have any of these conditions: History of blood diseases, such as sickle cell anemia or leukemia Stomach ulcers, other stomach or intestine problems An unusual or allergic reaction to sildenafil, other medications, foods, dyes, or preservatives Take this medication by mouth with a glass of water. Do not drive or operate machinery until you know how this medication affects you.

• Sildenafil citrate 100mg tablets can be part of erectile dysfunction treatment plans.
• The medication should be taken approximately 30 minutes to 1 hour before sexual activity.
• Sildenafil does not increase sexual desire but facilitates erection during arousal.
• Patients with heart conditions should seek medical advice before use.
• The medication can cause low blood pressure in some users.
• S sildenafil is not intended for recreational use.
• Do not use sildenafil if you are taking medications for high blood pressure without consulting a doctor.
• The effects depend on individual health and other medications taken concurrently.
• Sildenafil is contraindicated in patients taking certain alpha-blockers.
• Regular follow-up with a healthcare provider is recommended during treatment.
• Alcohol consumption may reduce the effectiveness of sildenafil.
• Read all warnings and instructions provided with the medication.

Sit up or stand slowly to reduce the risk of dizzy or fainting spells. Drinking alcohol with this medication can increase the risk of these side effects.

Contact your care team right away if you have an erection that lasts longer than 4 hours or if it becomes painful. This may be a sign of a serious problem and must be treated right away to prevent permanent damage. If you experience symptoms of nausea, dizziness, chest pain or arm pain upon initiation of sexual activity after taking this medication, you should refrain from further activity and call your care team as soon as possible. Using this medication does not protect you or your partner against HIV or other sexually transmitted infections (STIs).

Side effects that you should report to your care team as soon as possible: Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat Heart attack—pain or tightness in the chest, shoulders, arms, or jaw, nausea, shortness of breath, cold or clammy skin, feeling faint or lightheaded Heart rhythm changes—fast or irregular heartbeat, dizziness, feeling faint or lightheaded, chest pain, trouble breathing Low blood pressure—dizziness, feeling faint or lightheaded, blurry vision Stroke—sudden numbness or weakness of the face, arm, or leg, trouble speaking, confusion, trouble walking, loss of balance or coordination, dizziness, severe headache, change in vision Sudden vision loss in one or both eyes Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome): This list may not describe all possible side effects.

Why is this medication prescribed?

Rarely, a sudden decrease or loss of hearing, sometimes with ringing in the ears and dizziness, may occur. Stop taking sildenafil and get medical help right away if these effects occur. Rarely, males may have a painful or prolonged erection lasting 4 or more hours. If this occurs, stop using this drug and get medical help right away, or permanent problems could occur. A very serious allergic reaction to this drug is rare.

Addyi (filbanserin)

However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: itching/swelling (especially of the face/tongue/throat) This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. You may report side effects to FDA at 1-800-FDA-1088 or at In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345. Before taking sildenafil, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies.

Erectile Dysfunction

This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Before using this medication, tell your doctor or pharmacist your medical history, especially of: heart problems (such as heart attack or life-threatening irregular heartbeat in the past 6 months, chest pain/angina, heart failure) penis conditions (such as angulation, fibrosis/scarring, Peyronie's disease) conditions that may increase the risk of priapism (such as sickle cell anemia, leukemia, multiple myeloma) eye problems (such as retinitis pigmentosa, sudden decreased vision, NAION) This drug may make you dizzy or cause vision problems. Alcohol or marijuana (cannabis) can make you more dizzy. Do not drive, use machinery, or do anything that needs alertness or clear vision until you can do it safely.