Macro view
Active constituent is sildenafil citrate. Primary indication: treatment of male erectile dysfunction. Some clinicians may consider off-label uses in special situations, but any off-label use should be managed by a qualified prescriber. For rules on purchasing in the United States see the Legal Condition section at Legal Acceptance Status and Purchase Compliance Rules (USA).
The the method by which it operates and operation: sildenafil inhibits the enzyme phosphodiesterase type 5 (PDE5), which enhances nitric-oxide mediated vasodilation in the corpus cavernosum and improves blood flow during sexual stimulation.
Tablet strengths marketed for erectile dysfunction in the United States are generally 25 mg, 50 mg, and 100 mg. Other strengths or brand names, such as Cenforce, are commonly found outside the US and may not have FDA approval. See Optional routes and Comparable Medications for comparable options.
What You Need to Know About Taking Sildenafil
Recommended starting dose for most adult men is 50 mg taken about 30 to 60 minutes before sexual activity. Based on effect and adverse reactions a clinician may reduce the dose to 25 mg or increase it to 100 mg. Do not take more than one dose every 24 hours.
- Sildenafil is usually taken as needed rather than on a fixed daily schedule unless your clinician advises otherwise.
- High-fat meals can delay the onset of action and reduce peak blood levels. Taking sildenafil on a relatively empty stomach often gives a faster response.
- Take the tablet with water and swallow it. The erection effect of this medication occurs only with sexual arousal.
- If you have impaired kidney or liver function, are older, or are taking interacting drugs, your prescriber may suggest a lower initial dose. Evaluating interactive engagements fuel collaboration and innovation. at Pharmacodynamic Drug Interactions with others.
Essential Safety procedures and Warning messages
- If you are allergic to sildenafil or any tablet ingredient, do not take this medicine.
- Because sexual activity can stress the heart, avoid sildenafil if your clinician has advised you not to engage in sexual intercourse for cardiac reasons.
- Sildenafil can lower systemic blood pressure. The effect can be greater if it is combined with alcohol, dehydration, or other blood pressure lowering drugs.
- Rare cases of sudden vision loss and sudden hearing impairment have been reported. Stop the medicine and seek urgent medical care if these occur.
- Priapism is a medical emergency. If an erection persists longer than 4 hours get immediate medical attention to reduce the risk of permanent injury.
- Older adults may be more sensitive to dizziness and low blood pressure; dose adjustment may be required.
- Ailments of the liver or kidneys may require dose reduction and closer continuous oversight.
- Limit alcohol while taking sildenafil because alcohol can impair erection and increase dizziness.
Talk to your healthcare provider for individualized tracking and monitoring of performance and risk assessment. Eye the details of the the mutual influence during contact at Drug Exchanges and tracking interacting as a shared activitys helps measure engagement..
Cautions against use due to medical reasons
- Do not use sildenafil with nitrates or nitric oxide donors (for example nitroglycerin or isosorbide dinitrate) or with recreational alkyl nitrites, because the combination can cause severe hypotension.
- Sildenafil is contraindicated with soluble guanylate cyclase stimulators such as riociguat.
- Please do not merge. sildenafil with other PDE5 inhibitors or with injectable ED agents unless directed by a prescriber.
- Known hypersensitivity to sildenafil or any of the tablet components.
- Sildenafil is not generally approved for use in women or children for erectile dysfunction; any such use should be supervised by appropriate specialists.
Possible adverse reactions
Sildenafil is commonly well tolerated by users. Common, rarely severe secondary effects include:
- A a pounding headache and flushing of the face
- Digestive upset or chest discomfort
- Nasal stuffiness and runny nose
- Lightheadedness with dizziness
Seek emergency care for severe reactions such as chest pain, fainting, an erection lasting more than 4 hours, sudden vision loss, sudden hearing loss, or signs of a serious allergic reaction. See Overdose scenario Response Actions for guidance on accidental excessive intake.
Prescription Drug Interactions between parties
- Nitrates and nitrite-based products: combining them with sildenafil can produce dangerous blood pressure drops and is strictly contraindicated.
- Alpha-adrenergic blockers such as tamsulosin or doxazosin: combining these increases the risk of symptomatic hypotension; your prescriber may want to stabilize the alpha-blocker dose first and consider a lower sildenafil dose.
- Other antihypertensive medicines: additive blood pressure lowering can occur.
- Strong CYP3A inhibitors (for example ritonavir, cobicistat, ketoconazole, itraconazole, clarithromycin): these drugs may raise sildenafil levels; dose adjustment or avoidance can be necessary.
- CYP3A inducers (for example rifampin, carbamazepine, phenytoin): these can lower sildenafil exposure and reduce effectiveness.
- Grapefruit and grapefruit juice: may increase sildenafil exposure and should be avoided close to dosing.
- Other ED medications or intracavernosal agents should not be combined without medical direction.
Always give your prescriber a complete list of prescription medicines, over the counter drugs, supplements, and herbal products before starting sildenafil. Reopen the pharmacologic dosing guidance at Ways to Use Sildenafil.
What to Do When You Miss a Dose
Sildenafil is used when needed for sexual activity. If you plan to have sex and have not taken the tablet previously, take one dose as directed but do not exceed one dose in any 24-hour period.
OD event Intervention Procedures
If someone has taken too much sildenafil, seek emergency medical care or contact emergency services right away. If possible bring the medication container to the hospital.
Signs of non-fatal overdose can include severe dizziness, fainting, chest pain, irregular heartbeat, extreme nausea or vomiting, and marked vision changes. Emergency clinicians will assess and provide supportive care.
Tips for Data archived data is kept in long term storage. and retrieval
- Store at room temperature, ideally between 68 to 77 F (20 to 25 C).
- Keep tablets in a dry place away from direct light and moisture.
- Avoid storing medicines in bathrooms or other humid locations.
- Store out of the sight and reach of children and pets.
Other Options for Similar Medications
Other PDE5 inhibitors may be chosen based on how quickly they act, how long they last, side effect profiles, and cost. Collaborate with your clinician to review available options.
- Sildenafil products: available as brand Viagra and multiple generics. Typical onset 30 to 60 minutes; duration commonly 4 to 6 hours. Food can delay onset.
- Tadalafil (Cialis): onset in about 30 to 45 minutes for many users and a longer duration up to 36 hours. Available as daily low-dose regimens (2.5 to 5 mg) or on demand (10 to 20 mg). Also approved for benign prostatic hyperplasia.
- Vardenafil (Levitra, Staxyn): onset and duration similar to sildenafil; some formulations may be affected by meals.
- Avanafil (Stendra): may act faster for some people (as soon as 15 to 30 minutes) and lasts approximately 4 to 6 hours.
Note: Cenforce is a trade name more commonly used outside the United States. In the US, obtain sildenafil through licensed pharmacies, where products will be labeled as generic sildenafil or Viagra. See estimated price projections at Prices observed in the United States expressed in USD and legal buying guidance at Regulatory Status and Purchase Terms (USA).
Prices in the US in USD
Retail cost varies by pharmacy, manufacturer discounts, insurance coverage, dose, and quantity. The following approximate per-tablet cash range of costs are for general orientation:
- Generic sildenafil 25 to 100 mg: commonly ranges from about $0.50 to $5.00 per tablet when using coupon programs; cash retail without discounts can be $8 to $30 per tablet.
- Viagra brand 25 to 100 mg: frequently about $60 to $90 per tablet.
- Tadalafil generic 5 to 20 mg: roughly $0.70 to $6.00 per tablet; Cialis brand often $50 to $80 per tablet.
- Vardenafil generic 10 to 20 mg: approximately $2 to $10 per tablet; brand Levitra where sold can be $40 to $70.
- Avanafil (Stendra) 50 to 200 mg: commonly around $15 to $50 per tablet.
Example monthly cost depends on dosing frequency. For instance, using generic sildenafil once weekly is typically inexpensive, but frequent dosing or brand-name products increases monthly cost substantially. Prices change over time; contact local pharmacies or verified online pharmacy price tools for current figures.
Regulatory Status and Shopping Rules (USA)
- Prescription requirement: sildenafil for erectile dysfunction is available by prescription only in the United States. A valid prescription from a licensed clinician is required to obtain it from a US pharmacy.
- FDA approval and branding: many Cenforce-branded products sold internationally are not FDA approved. In the US, FDA-approved products appear as Viagra or as generic sildenafil under approved labeling.
- Telemedicine: licensed US clinicians may evaluate patients by telehealth and issue prescriptions when appropriate, subject to state practice rules.
- Online pharmacies: prefer state-licensed pharmacies and those with recognized accreditation such as the NABP Verified or .pharmacy domains. Avoid suppliers that deliver prescription medicines without requiring a prescription.
- Importation: importing prescription medicines from other countries is generally discouraged and can be illegal; shipments may be detained and product quality may be uncertain. If you are considering importation, consult FDA guidance and your state pharmacy board.
- Age limits: intended for adults aged 18 years and older unless a specialist advises otherwise.
- Athletes and competition: sildenafil is not currently on the WADA Prohibited List, but athletes should follow sport and employer rules and use only legally obtained products with documentation.
For personalized legal or clinical advice consult a licensed healthcare professional, your state board of pharmacy, and FDA resources. Review a safety information brief in Notice: Caution notes and Operational warnings and frequent interacting as a shared activitys boost coordination. at Drug Interaction Safety.
Condensed FAQ
How quickly does sildenafil work? Most people notice an effect within 30 to 60 minutes; it may occur sooner on an empty stomach. A fatty meal can delay onset.
Can I take sildenafil on a day to day basis? Only one dose should be taken in a 24 hour span. If you need daily treatment, speak with your clinician about plan B routes such as daily low-dose tadalafil.
Is Cenforce essentially Viagra? Both can contain sildenafil citrate, but Cenforce is often sold outside the US and may not be FDA-approved. In the United States obtain sildenafil through licensed pharmacies as generics or as the brand Viagra.
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