Core information briefing

• Active chemical: sildenafil, frequently dispensed as sildenafil citrate.
• Primary indication: Treatment of erectile dysfunction in adult men; separate labeled regimens exist for pulmonary arterial hypertension.
• Common tablet strengths on the market: 25 mg, 50 mg, and 100 mg.
• Usual onset and duration: Many men notice effect within 30 to 60 minutes; effect commonly lasts around 4 hours for typical users.
• Food and drink considerations: Very fatty meals can delay onset; grapefruit products may raise blood concentrations. See Administration and dosing procedures and Medication user the give and take of interactions drive engagement and learning. an introductory briefing on the peakic.
• Never combine with nitrates or another PDE5 inhibitor unless explicitly instructed by a clinician; see When Not To Utilize and Cautions.

How sildenafil facilitates erection

Sildenafil belongs to the drug class known as phosphodiesterase type 5 (PDE5) inhibitors. When sexual stimulation triggers nitric oxide release, sildenafil helps prolong the relaxation of penile blood vessel smooth muscle, which permits increased blood flow and enables erection maintenance. It does not generate sexual desire on its own; stimulation is required for effect.

There are different formulations and dosing schedules for pulmonary arterial hypertension that follow separate prescribing guidance. Clinicians may also prescribe sildenafil off label for other conditions when evidence and clinical judgment support that use.

Dosing and administration specifics

Common dosing approach for erectile dysfunction:

• Usual starting dose: 50 mg taken roughly 30 to 60 minutes before planned sexual activity.
• Adjustable range: Depending on tolerance and effect, doses can be lowered to 25 mg or increased to 100 mg once per 24 hours.
• You may take at most one dose in a 24-hour period.
• Meal effects: A very large or fatty meal may delay how quickly the drug works.
• Avoid grapefruit or grapefruit juice while using sildenafil because they can increase drug exposure; see Potential clinically relevant drug interpersonal dialogue and exchange hazards a capsule summary.
• Limit heavy alcohol intake since alcohol can blunt response and raise the risk of lightheadedness.

People with serious liver or kidney impairment, or those taking interacting medicines, may start at a lower dose such as 25 mg or require lengthened dosing intervals. When in doubt, consult your prescriber or study the Safety guidelines before use sectional unit.

Before you operate, follow these proactive precautions

Discuss the following with your prescribing clinician:

• Allergies: Do not take sildenafil if you have a known allergy to sildenafil or other listed ingredients in the product.
• Cardiac history: Tell your clinician about recent heart attack, stroke, unstable angina, heart failure, or poorly controlled high blood pressure.
• Vision and hearing events: Rare reports exist of sudden vision loss or sudden hearing decrease. Stop the drug and seek urgent care if these occur.
• Prolonged erection (priapism): An erection lasting longer than 4 hours is a medical emergency; obtain immediate care to avoid permanent damage.
• Older adults: They may be more vulnerable to dizziness and low blood pressure; a lower starting dose is often recommended.
• Not intended for women or children for ED: Sildenafil for erectile dysfunction is licensed for adult men.

If you use nitrates, alpha-blockers, or other heart medicationsverification the Notice: Contraclues that suggest to use in these settings and Hazard warnings with the addition of the Drug combination interactions among individualss among teammates fuel progress. a broad summary before starting sildenafil.

When to Avoid: Not for Use: Reasons to avoid use and Risk warnings

• Concurrent nitrate therapy: Combining sildenafil with nitrates or nitric oxide donors (used for angina or some recreational inhalants) can cause severe and life threatening hypotension and must be avoided.
• Other PDE5 inhibitors: Do not take sildenafil together with another PDE5 inhibitor or other ED drugs on the same day unless a clinician advises otherwise.
• Known hypersensitivity: If you are allergic to sildenafil or any excipient in the pill, do not use it.
• Pediatric and female use: Sildenafil is not approved for treatment of male erectile dysfunction in women or children.

For a fuller list of medicines to avoid, consult the Interactive encounters between medicines a brief overview of the subject and discuss all current prescriptions and supplements with a pharmacist or prescriber.

Unwanted reactions and cautionary signs

Most harmful effects are temporary and mild, but some require urgent attention.

• Common, mild in most scenarios: Pain in the head with facial flushing with nasal congestion, indigestion, upset stomach, dizziness, and diarrhea.
• Less frequent but serious: Severe allergic reaction, chest pain, sudden hearing loss, notable vision changes including color perception changes, fainting, and priapism (painful erection lasting more than 4 hours).

Stop sildenafil and seek emergency help for severe allergic reactions, chest pain, sudden loss of vision or hearing, severe dizziness, fainting, or an erection lasting longer than 4 hours. Notify your prescriber or pharmacist about any unexpected harmful effects.

Drug the dynamics of interaction considerations a sweeping overview of the material

• Must avoid: Nitrates and nitric oxide donors because the combination can produce life threatening drops in blood pressure.
• Use care with: Alpha-blockers and some antihypertensives; the combination can cause symptomatic hypotension.
• Other ED agents: Do not merge the elements. sildenafil with other PDE5 inhibitors without clear medical advice.
• CYP3A4 affecting medicines: Strong inhibitors (for example ritonavir, ketoconazole, clarithromycin) can increase sildenafil levels; strong inducers (for example rifampin, carbamazepine) may lower levels and reduce effectiveness.
• Dietary interacting with otherss fuel collaboration and innovation.: Grapefruit and grapefruit juice raise sildenafil blood levels and should be avoided.

Always provide a full list of your prescription, over the counter, and herbal medicines to your clinician. When unsure about a possible contact and response, consult a pharmacist or appraise the The how dosing is administered process guidance for timing and food effects.

Omitted dose planning

Sildenafil for erectile dysfunction is commonly taken as needed, not on a fixed schedule. If you planned to take a dose and missed it, take the medication when you next plan for sexual activity, making sure at least 24 hours have passed since your last dose.

What to do in an an accidental overdose plan items and management

Ingesting more than the recommended dose can lead to serious symptoms such as extreme dizziness, fainting, nausea, chest pain, or abnormal heart rhythms. If you suspect an a drug overdose, get emergency medical attention immediately or contact your local poison control center to help you navigate.

Storing and handling guidelines guidance

• Keep at standard room temperatures, about 68 to 77 degrees F (20 to 25 degrees C).
• Protect tablets from excess moisture and strong light; avoid storing medication in bathrooms or other humid spaces.
• Do not permit access by children or pets. and retain original packaging when possible for identification and expiry the information.

For safe disposal options and additional safety measures, consult local medicine take back programs or refer to the Notes on United States regulatory and legal matters to provide direction.

Options and costs comparison

If sildenafil is not suitable, several other medical and nonmedical options exist. Choice depends on onset speed, duration, side effect profile, personal medical history, and cost considerations.

• Tadalafil (Cialis): May last much longer for some users, up to 36 hours; available for as needed use and low dose daily regimens.
• Avanafil (Stendra): Often a quicker onset in some men, occasionally within 15 to 30 minutes, with a duration around 6 hours for many.
• Vardenafil (Levitra, Staxyn ODT): Comparable onset to sildenafil with a similar 4 to 5 hour window; Staxyn is an orally disintegrating tablet option.
• Alprostadil (injectable or urethral): Nonoral choices like Caverject or Muse for men who cannot use PDE5 inhibitors; these require clinician training.
• Device and also therapy options: Devices for vacuum-assisted erections, constriction rings, counseling for performance anxiety, and management of underlying conditions such as diabetes, obesity, or tobacco use.

Peruse the Average prices seen in the United States (USD) section for cost cross checks paired with the Pharmacologic the act of engaging with otherss with others are the core of collaboration. a sweeping overview of the material for the give and take of interaction differences among these agents.

Typical price bands in the US (USD)

Retail costs depend on pharmacy, insurance, dose, quantity, and discount programs. The following are approximate ranges for comparison and are subject to change.

• Generic sildenafil 100 mg: Often about $1 to $10 per tablet with common discount cards; a 30 tablet supply may range roughly $20 to $150 based on source and savings.
• Brand Viagra 100 mg: Generally more costly, commonly about $60 to $90 per tablet at retail; multi tablet purchases can total several hundred dollars or more without discounts.
• Other examples:
  • Generic tadalafil (10 mg or 20 mg): Approximately $1 to $12 per tablet; branded Cialis retail prices are typically higher without savings.
  • Generic vardenafil: Roughly $2 to $15 per tablet depending on dose and supplier.
  • Avanafil (brand Stendra): Brand premium pricing often about $10 to $30 per tablet; availability of generics and discount programs may lower cost.

To reduce out of pocket cost consider manufacturer coupons, pharmacy discount cards, price benchmarking services, telehealth subscription plans, or insurance coverage. Exercise caution when purchasing from unknown foreign vendors; see Regulatory and regulatory notes United States for safe purchasing advice.

Notes on United States law and regulation

• Prescription requirement: Sildenafil for erectile dysfunction is approved by the FDA and requires a valid prescription from a licensed US clinician for legal dispensing, including mail order and telehealth pharmaceutical retailers.
• Telehealth: Electronic prescriptions and telemedicine visits are permitted, but prescribers must follow federal and state licensing and practice rules. Typically, the clinician must be licensed in the state where the patient is located.
• Pharmacy verification: Use licensed pharmacies that show credentials such as NABP accreditation or appear on recognized .pharmacy lists.
• Importing medicines: Importation of prescription drugs from abroad is generally restricted and carries risks of counterfeit or substandard products; there are limited exceptions. Avoid unverified foreign sellers.
• Consumer safety: Report suspected counterfeit products or serious adverse events to FDA MedWatch. Contact your state board of pharmacy if you suspect an illegitimate pharmacy.
• Operating machinery: Be careful driving or operating heavy equipment until you know how sildenafil affects you, especially if you experience dizziness or vision changes.
• Do not share prescriptions: Sharing prescription medication is unsafe and often unlawful. Dispose of unused medication following FDA suggestions or local take back programs.

If you have concerns about an online pharmacy or a product, contact your state board of pharmacy or a trusted local pharmacist for verification. For safe drug combinations, consult the Drug the process of interaction checks a lay of the land for atopic or speak with the guidance of your prescriber.

Further resources and notes

Always read the official medication guide that accompanies your prescription for complete safety and prescribing instructions. For more detailed information on related productssystematic review resources about tadalafil, avanafil, vardenafil, and alprostadil or discuss options with your healthcare provider.

Quick path links in this document: Dosing and administration specifics, Interactions among users of medications the essence in brief, Common US prices (USD), and US regulatory and counsel on legal issues.