Sildenafil 25mg
Generic For: Viagra
Sildenafil 25mg is the generic form of Viagra, a prescription tablet used to treat erectile dysfunction (ED) in adult men. It works by increasing blood flow to help achieve and maintain an erection during sexual activity. After a licensed provider reviews your health information and prescription, your order ships from a licensed U.S. pharmacy.
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Sildenafil is a PDE5 inhibitor used to treat erectile dysfunction (ED) and pulmonary arterial hypertension
Sildenafil 25mg Quick Facts
| Drug class | PDE5 inhibitor |
|---|---|
| Treats | Erectile dysfunction (ED), pulmonary arterial hypertension (PAH) |
| Form | Tablet |
| Typical dosing | Take 1 tablet by mouth 1-4 hours before sexual activity (take on empty stomach). Never take more than 1 tablet in a 24 hour period. |
| Prescription required | Yes — prescription only |
What Is Sildenafil 25mg?
Sildenafil is a prescription medication best known under the brand name Viagra. It belongs to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors, which relax blood vessels and improve blood flow. For erectile dysfunction, sildenafil helps men achieve and maintain an erection when combined with sexual stimulation. A different formulation of sildenafil (Revatio) is also FDA-approved to treat pulmonary arterial hypertension.
What Does Sildenafil 25mg Treat?
Erectile dysfunction (ED) in adult men
Difficulty achieving an erection
Difficulty maintaining an erection during sexual activity
Pulmonary arterial hypertension (as a separate formulation, Revatio)
Sildenafil 25mg Dosage
ED: 50 mg by mouth once daily as needed, about 1 hour before sexual activity.
Dose may be adjusted to 25 mg or increased to 100 mg based on response and tolerability.
Maximum: one dose per day.
Your prescriber will determine the dose and duration that are right for you. Always follow the directions on your prescription label.
Sildenafil 25mg Side Effects
Common side effects
- Headache
- Flushing
- Indigestion (dyspepsia)
- Nasal congestion
- Dizziness
- Back pain
- Visual disturbances (blue-tinged vision, blurred vision)
Serious side effects
Stop taking this medication and seek medical attention right away if you experience:
- Erection lasting more than 4 hours (priapism)
- Sudden vision loss in one or both eyes
- Sudden hearing loss or ringing in the ears
- Chest pain or symptoms of a heart attack
- Severe allergic reaction (rash, swelling, trouble breathing)
Warnings & Interactions
Do not use with nitrates (e.g., nitroglycerin) — can cause a dangerous drop in blood pressure
Do not use with guanylate cyclase stimulators such as riociguat
Use caution with alpha-blockers and other blood pressure medications
Not recommended for men advised against sexual activity due to heart problems
Seek immediate care for an erection lasting more than 4 hours
Tell your provider about liver, kidney, or eye conditions (including retinitis pigmentosa)
CYP3A4 inhibitors (e.g., ketoconazole, ritonavir) may increase sildenafil levels
Tell your prescriber about all medications, supplements, and health conditions before starting sildenafil 25mg.
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