Sildenafil
Generic medicine reference
Not yet clinically reviewed
This entry was migrated from the earlier Pharmapedia app bundle and has not been reviewed by a named clinician on this site. It is provided for educational reference only — verify dosage and safety information against current, authoritative sources and a qualified healthcare professional before any clinical use.
Overview
Sildenafil is used to treat erectile dysfunction (ED) in adult men or pulmonary arterial hypertension (PAH) in adults and children, depending on the brand or formulation.
Sildenafil tablets (25 mg, 50 mg, 100 mg; Viagra, generic) and sildenafil oral film (25 mg, 50 mg, 75 mg, 100 mg; Vybrique) are used for ED . Sildenafil tablets (20 mg; Revatio, generic), sildenafil oral suspension (Revatio, generic), and sildenafil injection (Revatio, generic) are used for PAH .
Sildenafil is a phosphodiesterase type 5 ( PDE5 ) inhibitor, which breaks down cyclic GMP and enhances nitric oxide (NO) -mediated smooth muscle relaxation. In erectile dysfunction (ED), this increases blood flow to penile tissue, facilitating an erection. In pulmonary arterial hypertension (PAH), it dilates pulmonary vessels by the same mechanism, reducing pulmonary blood pressure and improving exercise capacity.
Sildenafil first gained FDA approval on March 27, 1998. It is available as a generic.
Indications
Sildenafil is used to treat erectile dysfunction (ED) in adult men or pulmonary arterial hypertension (PAH) in adults and children, depending on the brand or formulation.
Sildenafil tablets (25 mg, 50 mg, 100 mg; Viagra, generic) and sildenafil oral film (25 mg, 50 mg, 75 mg, 100 mg; Vybrique) are used for ED . Sildenafil tablets (20 mg; Revatio, generic), sildenafil oral suspension (Revatio, generic), and sildenafil injection (Revatio, generic) are used for PAH .
Sildenafil is a phosphodiesterase type 5 ( PDE5 ) inhibitor, which breaks down cyclic GMP and enhances nitric oxide (NO) -mediated smooth muscle relaxation. In erectile dysfunction (ED), this increases blood flow to penile tissue, facilitating an erection. In pulmonary arterial hypertension (PAH), it dilates pulmonary vessels by the same mechanism, reducing pulmonary blood pressure and improving exercise capacity.
Sildenafil first gained FDA approval on March 27, 1998. It is available as a generic.
Contraindications
Do not use sildenafil if you:
Have allergies to sildenafil, Viagra, Revatio, Vybrique, or any of the ingredients in the sildenafil formulation you are taking Take other medicines for pulmonary arterial hypertension, such as riociguat (Adempas) Take other medicines that lower your blood pressure, such as nitroglycerin , isosorbide dinitrate , isosorbide mononitrate , and some recreational drugs that also contain nitrates, such as "poppers". Taking sildenafil with a nitrate medicine can cause a sudden and serious decrease in blood pressure.
To make sure sildenafil is safe for you, tell your healthcare provider about all your medical conditions, including if you have:
Or have had heart problems such as a heart attack, irregular heartbeat, angina, chest pain, narrowing of the aortic valve, or heart failure Had heart surgery within the last 6 months Pulmonary hypertension Had a stroke Low blood pressure, or high blood pressure that is not controlled A physical deformity of the penis (such as Peyronie's disease ) Been told you should not have sexual intercourse for health reasons and you are a male Had an erection that lasted for more than 4 hours Problems with your blood cells, such as sickle cell anemia, multiple myeloma, or leukemia Retinitis pigmentosa, a rare genetic (runs in families) eye disease Ever had severe vision loss, including an eye problem called non-arteritic anterior ischemic optic neuropathy (NAION) Pulmonary veno-occlusive disease (PVOD) Bleeding problems Have had stomach ulcers Liver problems Kidney problems or are having kidney dialysis Are pregnant or intending to become pregnant (for patients with PAH) Are breastfeeding or intending to breastfeed (for patients with PAH).
Sildenafil for ED is not approved for males <18 years old.
Side Effects
The severe or irreversible adverse effects of Sildenafil, which give rise to further complications include Hypotension, Ventricular arrhythmia.Sildenafil produces potentially life-threatening effects which include Myocardial infarction, Sudden death, Stroke. which are responsible for the discontinuation of Sildenafil therapy.The signs and symptoms that are produced after the acute overdosage of Sildenafil include Diarrhea, Gastritis, Dyspepsia.The symptomatic adverse reactions produced by Sildenafil are more or less tolerable and if they become severe, they can be treated symptomatically, these include Dizziness, Headache, Vomiting, Diarrhea, Dyspepsia, Flushing, Sneezing, Nasal congestion, Photophobia, Vison disturbance, Pulse irregularities.
Warnings
Do not take sildenafil if you are also using a nitrate drug for chest pain or heart problems, including nitroglycerin , isosorbide dinitrate , isosorbide mononitrate , and some recreational drugs such as "poppers". Taking sildenafil with a nitrate medicine can cause a sudden and serious decrease in blood pressure.
Some medicines can cause unwanted or dangerous effects when used with sildenafil. Tell your doctor about all your current medicines, especially riociguat ( Adempas ). Do not take sildenafil with riociguat.
High Risk Groups
Do not take sildenafil if you are also using a nitrate drug for chest pain or heart problems, including nitroglycerin , isosorbide dinitrate , isosorbide mononitrate , and some recreational drugs such as "poppers". Taking sildenafil with a nitrate medicine can cause a sudden and serious decrease in blood pressure.
Some medicines can cause unwanted or dangerous effects when used with sildenafil. Tell your doctor about all your current medicines, especially riociguat ( Adempas ). Do not take sildenafil with riociguat.
Adult Dosage
50 to 100 mg (75 (75)) 24 hourly oral — The dose is reduced to 25 mg in elderly and in patients with hepatic or renal impairment or patients taking CYP450 inhibitors
Child Dosage
No child dosage information is recorded for this medicine yet.
Neonatal Dosage
No neonatal dosage information is recorded for this medicine yet.
Drug Interactions
Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements. Sildenafil may affect the way other medicines work, and other medicines may affect the way sildenafil works, causing side effects. Especially tell your healthcare provider if you take:
Nitrates for chest pain or heart problems. This includes nitroglycerin, isosorbide dinitrate, and isosorbide mononitrate. Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite ("poppers"). Taking sildenafil with a nitrate medicine can cause a sudden and serious decrease in blood pressure Guanylate cyclase stimulators, such as riociguat Alpha blockers such as doxazosin. Alpha-blockers are sometimes prescribed for prostate problems or high blood pressure. In some patients, the use of sildenafil with alpha-blockers can lead to a drop in blood pressure or fainting Other drugs to treat high blood pressure or a prostate disorder Medicines to treat HIV, such as protease inhibitors, such as ritonavir and saquinavir Some types of oral antifungal medicines, such as ketoconazole and itraconazole Some types of antibiotics, such as erythromycin Other medicines that treat high blood pressure Medicines or treatments for ED, such as avanafil (Stendra), tadalafil (Cialis), or vardenafil (Levitra). Tell your doctor about all other medications you use for erectile dysfunction.
Ask your healthcare provider or pharmacist for a list of these medicines if you are not sure. Know the medicines you take. Keep a list of them to show to your healthcare provider and pharmacist when you get a new medicine.
This list is not complete. Other drugs may interact with sildenafil, including prescription and over-the-counter medicines, vitamins , and herbal products . Not all possible drug interactions are listed here.
Storage
Store Between 15°C-30°C. Do not Freeze.
Available Brands in Pakistan
No brands are recorded for this generic.
