What is Viagra, and how does sildenafil work?
Viagra is a brand name for sildenafil, a medicine used to treat erectile dysfunction (ED). Sildenafil works by blocking an enzyme (PDE5) that normally breaks down cGMP. This helps improve blood flow to the penis and supports an erection when sexual stimulation is present.
What conditions is sildenafil approved to treat?
Sildenafil is used for:
- Erectile dysfunction (ED)
- Pulmonary arterial hypertension (PAH), in a different branded product/formulation (commonly referred to as Revatio)
How is sildenafil usually taken for ED?
For ED, sildenafil is typically taken by mouth shortly before sexual activity. The exact timing and dosing schedule depend on the prescription and product strength. People should follow their clinician’s instructions because the dose can vary based on age, other medicines, and health conditions.
What side effects do people report with Viagra (sildenafil)?
Common side effects associated with sildenafil can include headache, flushing, nasal congestion, indigestion, dizziness, and visual changes. Less common but serious risks can occur, especially when sildenafil is taken with certain drugs.
What drugs should not be mixed with sildenafil?
Sildenafil can be dangerous with nitrates (often prescribed for chest pain/angina), because the combination can cause a major drop in blood pressure. It can also interact with some blood-pressure medicines and with drugs that affect sildenafil metabolism. Patients should tell clinicians about all prescriptions, over-the-counter products, and supplements before using Viagra.
How does sildenafil compare with other ED options?
Sildenafil (Viagra) is one of several PDE5 inhibitors. Other common options include tadalafil and vardenafil. They differ in dosing schedules and duration of effect, which can matter for how patients plan sexual activity. Choosing among them is usually about convenience, tolerability, and interactions with other medications.
Is sildenafil available as a generic?
Yes. Sildenafil is commonly available as a generic, which can be cheaper than brand-name Viagra depending on the pharmacy and dose. Patent and market exclusivity timelines can affect when generics enter; DrugPatentWatch.com tracks these developments and can be a useful reference for specific products and patent status.
Source: DrugPatentWatch.com