Before taking Viagra, discuss your health with a provider, especially if you have heart problems or take nitrates for chest pain, as the combination can cause a dangerous drop in blood pressure . Common side effects may include headaches, flushing, or an upset stomach.
To legally and safely obtain Viagra, you must follow a process that involves a healthcare professional:
: Viagra is a prescription-only medication . You must consult with a licensed doctor—either in person or through a reputable telehealth service—who can evaluate if the medication is safe for you based on your medical history and other medications you may be taking .
: Sildenafil is the active ingredient in Viagra and is available as a generic medication . Generic sildenafil is medically equivalent to Pfizer's brand-name Viagra but is usually significantly more affordable . Safety and Side Effects
: Only purchase from pharmacies that require a valid prescription. Look for the Digital Pharmacy Accreditation (formerly VIPPS) or check the FDA's BeSafeRx for guidance on identifying safe websites.
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: It typically starts working within 30 to 60 minutes , though it can work as early as 12 minutes for some . It is most effective when taken on an empty stomach about an hour before sexual activity .
: The standard starting dose is 50 mg , but a doctor may adjust this to 25 mg or a maximum of 100 mg per day . You should never take more than one dose in a 24-hour period .