Drugs: Viagra Details - Composition, Strengths, Usage Guidelines, and More
Viagra, a medication used to treat erectile dysfunction (ED) in adults, comes in three strengths: 25 milligrams (mg), 50 mg, and 100 mg[1][3][5]. The typical starting dosage is 50 mg[1][5].
The dosage your doctor prescribes will depend on several factors, including age, other medications, and medical conditions[1][5]. Older adults, for instance, may start at a lower dose (25 mg) due to their bodies clearing Viagra from their system more slowly[1][4].
Viagra should be taken about 1 hour before sexual activity, but may be taken between 30 minutes and 4 hours before sexual activity[2]. It is important to note that neither Viagra nor Cialis (tadalafil) should be taken more than once per day[6].
Viagra tablets may be taken with or without food, but meals high in fat may cause Viagra to take longer than usual to start working[1]. The medication is meant to be used as a long-term treatment[7].
In cases where side effects such as headache, flushing, visual changes, or prolonged erections (priapism) are experienced, healthcare providers may lower the dose to achieve a balance of efficacy and tolerability[1][4].
Viagra is classified as a phosphodiesterase type 5 (PDE5) inhibitor[8]. Sildenafil, the active drug in Viagra, is also available in generic form[1].
Remember, it's crucial to consult with your doctor before starting or adjusting your dosage of Viagra. If you believe you've taken too much Viagra, call your doctor right away or contact America's Poison Control Centers[1][5].
In summary, doctors usually start patients on 50 mg Viagra and adjust the dose between 25 mg to 100 mg based on factors such as severity of ED, age, other health issues, medication interactions, and side effect profile to optimize safety and treatment efficacy[1][3][5].
[1] Mayo Clinic. (2021). Sildenafil (oral route) - Oral. Retrieved from https://www.mayoclinic.org/drugs-supplements/sildenafil-oral-route/description/drg-20074903 [2] Healthline. (2021). How long does it take for Viagra to work? Retrieved from https://www.healthline.com/health/how-long-does-it-take-for-viagra-to-work [3] Drugs.com. (2021). Viagra (sildenafil). Retrieved from https://www.drugs.com/viagra.html [4] NHS. (2021). Sildenafil (Viagra) for erectile dysfunction. Retrieved from https://www.nhs.uk/conditions/erectile-dysfunction-and-impotence/treatment/ [5] WebMD. (2021). Viagra (Sildenafil). Retrieved from https://www.webmd.com/drugs/2/drug-10856-7867/viagra-oral/details [6] Drugs.com. (2021). Cialis (tadalafil). Retrieved from https://www.drugs.com/cialis.html [7] Healthline. (2021). How long does Viagra last? Retrieved from https://www.healthline.com/health/how-long-does-viagra-last [8] Healthline. (2021). What is Viagra (sildenafil)? Retrieved from https://www.healthline.com/health/what-is-viagra-sildenafil
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- A lower dose of Viagra, such as 25 mg, may be prescribed for older adults due to their bodies clearing the medication from their system more slowly.
- Sildenafil, the active drug in Viagra, is not only used for treating ED, but its type 5 phosphodiesterase inhibitor properties have shown potential in treating pulmonary arterial hypertension.
