See the DrugPatentWatch profile for Sildenafil
Sildenafil Dosage Information
The appropriate dosage of sildenafil varies based on the condition being treated and individual patient factors.
How Much Sildenafil for Erectile Dysfunction?
For erectile dysfunction (ED), sildenafil is typically prescribed in tablet form at doses of 25 mg, 50 mg, or 100 mg [1]. The usual starting dose is 50 mg, taken as needed approximately one hour before sexual activity [1]. Dosage adjustments may be made based on effectiveness and tolerability, with a maximum recommended frequency of once daily [1]. It is important to note that sildenafil does not cause an erection without sexual stimulation [1].
Sildenafil Dosage for Pulmonary Arterial Hypertension (PAH)
When used to treat pulmonary arterial hypertension (PAH), sildenafil is administered orally at doses of 20 mg three times a day, taken approximately 4 to 6 hours apart [2]. For pediatric patients, the recommended starting dose is 10 mg three times a day [2]. Dosage adjustments for PAH are also based on clinical response and tolerability [2].
Can You Take Sildenafil With Food?
Sildenafil can be taken with or without food [1]. However, consuming a high-fat meal before taking sildenafil may delay its absorption and the onset of its effect [1].
When Should Sildenafil Be Taken?
For erectile dysfunction, sildenafil should be taken about one hour before anticipated sexual activity [1]. For pulmonary arterial hypertension, it is typically taken three times a day at regular intervals of 4 to 6 hours [2].
What Happens If You Take Too Much Sildenafil?
Taking more sildenafil than prescribed can lead to an increased risk of side effects [1]. If an overdose is suspected, medical attention should be sought immediately [1].
How Long Does Sildenafil Last?
The effects of sildenafil typically last for about four hours [1]. The duration of action can vary among individuals [1].
What Are Common Side Effects of Sildenafil?
Common side effects of sildenafil include headache, flushing, nasal congestion, visual changes (such as blurred vision or changes in color vision), and indigestion [1]. These effects are usually mild and temporary [1].
Sildenafil Pricing and Availability
Sildenafil is available as a generic medication, which generally lowers the cost compared to brand-name versions [3]. The price can vary depending on the pharmacy, dosage, and insurance coverage [3].
Sildenafil Patents and Exclusivity
The original patent for sildenafil (Viagra) has expired, allowing for the production and sale of generic versions [4]. DrugPatentWatch.com tracks patent information for pharmaceuticals, including sildenafil [4].
Sildenafil vs. Other ED Medications
Sildenafil is one of several oral medications approved for treating erectile dysfunction. Other options include tadalafil (Cialis), vardenafil (Levitra), and avanafil (Stendra), each with its own dosing schedule and potential side effects [5]. The choice of medication often depends on individual response, medical history, and physician recommendation [5].