If you experience any side effects, contact your healthcare provider immediately.
Our telemedicine providers are available to help you manage any side effects or concerns.
| Use Case | Description | Typical Dosage | Onset of Action |
|---|---|---|---|
| Treatment of Erectile Dysfunction | Helps improve blood flow to the penis for achieving and maintaining an erection. | 12.5 mg | 30-60 minutes |
| Pulmonary Hypertension | Used to lower blood pressure in the lungs to improve exercise capacity. | As prescribed | 15-30 minutes |
| Off-label uses | Sometimes used for other circulatory issues under medical supervision. | Varies | Varies |
Headache: Mild to moderate headaches are a common side effect. Flushing: A sensation of warmth or redness in the face, neck, or chest. Indigestion: Stomach discomfort or heartburn may occur.
25 mg to 50 mg taken orally once daily. 20 mg taken orally three times a day. Off-label use: 50 mg taken orally 1 hour before sexual activity. Tablets: 25 mg, 50 mg, 100 mg Injection: 10 mg/12.5 mL (1.12 mg/mL) Sildenafil should be taken exactly as directed by your healthcare provider. For erectile dysfunction, take it about 30 minutes to 1 hour before sexual activity. Nasal Congestion: A stuffy or runny nose is a frequent side effect. Vision sildenafil from canada Changes: Blurred vision or changes in color perception.
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Kamagra Oral Jelly | 100mg | 90 + 8 Sachets | 303.56€ 289.10€ | |
| Viagra Generic | 50mg | 10 Pills | 26.87€ 25.59€ | |
| Viagra Generic | 25mg | 120 + 6 Pills | 125.56€ 119.58€ | |
| Viagra Generic | 100mg | 90 + 6 Pills | 129.02€ 122.88€ | |
| Kamagra Oral Jelly | 100mg | 110 + 9 Sachets | 334.87€ 318.92€ | |
| Kamagra | 100mg | 20 Pills | 86.09€ 81.99€ | |
| Viagra Generic | 200mg | 30 + 2 Pills | 83.07€ 79.11€ | |
| Viagra Generic | 50mg | 270 + 8 Pills | 198.48€ 189.03€ | |
| Kamagra Oral Jelly | 100mg | 220 + 18 Sachets | 662.24€ 630.70€ | |
| Viagra Generic | 50mg | 20 Pills | 40.52€ 38.59€ |
Hearing Loss: Sudden decrease or loss of hearing. Priapism: An erection lasting more than 4 hours.
Always follow your healthcare provider’s instructions and consult them before making any changes to your dose. Our telemedicine providers can guide you through this process. Initial dose: 50 mg taken orally as needed, approximately 1 hour before sexual activity. Maintenance dose: 25 mg to 100 mg as needed, based on effectiveness and tolerance. Revatio: 5 mg or 20 mg taken orally three times a day, 4-6 hours apart.
Maximum dose: 20 mg three times a day. Consult your healthcare provider for the appropriate dose. 50 mg taken orally every 8 hours. Consult your healthcare sildenafil citrate tablets 200mg provider for the appropriate dose and duration. 25 mg to 50 mg taken orally three times a day. This is a medical emergency and requires immediate attention. Chest Pain: If you experience chest pain, stop taking Sildenafil and seek medical help right away. A contraindication is a specific situation or condition where a particular medication should not be used because it may cause harm. If you have any of the following conditions, taking Sildenafil may not be safe for you.
Always consult with one of our telemedicine providers before starting or stopping any medication.
| Parameter | Values | Notes |
|---|---|---|
| Absorption | Rapid | Peak plasma levels in approximately 30-60 min |
| Bioavailability | Approximately 40% | Due to first-pass metabolism |
| Half-life | About 4-5 hours | Duration of action may vary |
| Metabolism | Liver via CYP3A4 and CYP2C9 | Major pathways |
Severe heart or liver problems: Sildenafil can affect blood flow and may put additional strain on your heart or liver.
It can be taken with or without food, but high-fat meals may delay its effect. For pulmonary arterial hypertension, take it at evenly spaced intervals throughout the day. If you miss a dose, take it as soon as you remember, but do not double up on doses. Like all medications, Sildenafil can cause side effects. Some are common and mild, while others are less common but more serious. If you have severe heart conditions (such as a recent heart attack or stroke) or liver disease, this medication could worsen your condition.
Ueda P, Mercer CH, Ghaznavi C, Herbenick D. Trends in frequency of sexual activity and number of sexual partners among adults aged 18 to 44 years in the US, 2000–2018. Sexual life of Japanese patients with erectile dysfunction taking phosphodiesterase type 5 inhibitors: an internet survey using the psychological and interpersonal relationship scales-short form questionnaire. Treatment preferences of patients with erectile dysfunction: a systematic review of randomized controlled trials. A randomized open-label trial with a crossover comparison of sexual self-confidence and other treatment outcomes following tadalafil once a day vs.
tadalafil or sildenafil on-demand in men with erectile dysfunction. Rochira V, Balestrieri A, Madeo B, Granata AR, Carani C. Sildenafil improves sleep-related erections in hypogonadal men: evidence from a randomized, placebo-controlled, crossover study of a synergic role for both testosterone and sildenafil on penile erections. Daily use of sildenafil 50 mg at night effectively ameliorates nocturia in patients with lower urinary tract symptoms associated with benign prostatic hyperplasia: an exploratory multicenter, double-blind, randomized, placebo-controlled study. Greenstein A, Chen J, Salonia A, Sofer M, Matzkin H, Montorsi F.
Does sildenafil enhance quality of nocturnal erections in healthy young men? LB wrote the paper, FP, TC, CM, CC, MB, DDT, EI, GP, CP, AP supervised the paper, approved the final version of the manuscript. All methods were performed in accordance with the relevant guidelines and regulations. A consent statement was placed at the beginning of the survey. Each respondent indicated their agreement to participate by completing and submitting the questionnaire. Low blood pressure (hypotension): Sildenafil can lower your blood pressure further, which could lead to dizziness, fainting, or even a dangerous drop in blood pressure. Recent stroke or heart attack: If you’ve had a stroke or heart attack within the last 6 months, Sildenafil may increase your risk of another cardiovascular event due to its effects on blood flow and blood pressure. Use of nitrates: Nitrates (often used for chest pain) and Sildenafil both lower blood pressure.
Ethics approval was not needed for several reasons: the survey was conducted anonymously, the survey was completed by physicians and it does not contain patient’s data. Publisher’s note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. Sildenafil oral suspension formulation for erectile dysfunction: pfizer sildenafil 50 is it love at first sight?. Efficacy of topical sildenafil formulations in enhancing wound healing outcomes: a narrative review Archives of Dermatological Research (2025) For those of you taking Sildenafil (Viagra) to help with ED, I am asking this dosing question. I just got my first script from the online pharmacy my doctor sent it to, and the bottle says "Take two pills daily and 3 more 1 hour before sexual activity." And then on the "appointed day" take 5?
Go to the Prostate Cancer Support Group. It seems to be common to do this to try and resolve ED issues. I'm not a medical professional, but here's a document on UCSF that someone on this blog mentioned in another thread. It has a section on Penile Rehabilitation that includes some information related to your question: Best wishes. I would think your doctor would’ve checked up before prescribing it for you though, but you never know.
You should at least mention to your doctor, the side effects you have felt from taking the drug. See what he has to say about it. Yes, and I have spoken to her. The sildenafil is for "lung blood pressure", whatever that means. It has not impacted my pulse rate or my BP. Taking them together can cause a significant and dangerous drop in blood pressure. Severe vision loss: If you have a condition called non-arteritic anterior ischemic optic neuropathy (NAION), taking Sildenafil could increase the risk of further vision loss. Allergy to Sildenafil: If you have had an allergic reaction to Sildenafil or any of its ingredients, you should not take this medication. Certain medications can interact with Sildenafil, either reducing its effectiveness or increasing the risk of side effects. It’s important to inform your healthcare provider about all the medications you are currently taking, including over-the-counter drugs and supplements. Below are some common medications that may interact with Sildenafil: Nitrates (e.g., nitroglycerin, isosorbide dinitrate): These are used to treat chest pain (angina). When combined with Sildenafil, they can cause a dangerous drop in blood pressure.
I think I'm just sensitive to it. It can cause problems if you normally have low blood pressure. Revatio, Viagra, and generics Phosphodiesterase type-5 (PDE5) inhibitor Tabs:Revatio and generics: 20 mgViagra and generics: 25, 50, 100 mg Viagra and generics: 25, 50, 100 mg Oral suspension: 2.5 mg/mLRevatio and generics: 10 mg/mL (112 mL); may contain sodium benzoate Revatio and generics: 10 mg/mL (112 mL); may contain sodium benzoate Injection:Revatio and generics: 0.8 mg/mL (12.5 mL) Revatio and generics: 0.8 mg/mL (12.5 mL) There's more to see -- the rest of this topic is available only to subscribers. * Article titles in AMA citation format should be in sentence-case TY - ELEC T1 - Sildenafil ID - 309687 ED - Hughes,Helen K, ED - Kahl,Lauren K, BT - Harriet Lane Handbook UR - PB - Elsevier ET - 23 DB - Harriet Lane DP - Unbound Medicine ER - 1Advanced Heart Failure and Heart Transplant Unit, Universitary Hospital of A Coruna, A Coruna, Spain 2Hemodynamic Unit, Universitary Hospital of A Coruna, A Coruna, Spain 3Cardiac Surgery Service, Universitary Hospital of A Coruna, A Coruna, Spain 4Pharmacy Service, Universitary Hospital of A Coruna, A Coruna, Spain DOI: 10.1016/j.healun.2012.01.498 External LinkAlso available on ScienceDirect External Link Copyright: © 2012 International Society for Heart and Lung Transplantation. Among heart transplantation (HT) patients, pre-HT pulmonary hypertension (PH), is an independent predictor of mortality.
Perioperative administration of sildenafil may prevent right ventricular failure in HT recipients with persistent PH after HT. Aim: To evaluate the effects of chronic sildenafil use on right ventricle systolic pressure (RVSP) and the safety of this therapy. Sildenafil is a prescription medication commonly used to treat erectile dysfunction (ED), pulmonary arterial hypertension (PAH), and other conditions. It works by relaxing blood vessels, which improves blood flow to specific areas of the body. Sildenafil is available in various forms and strengths.
Always consult a healthcare provider before starting or adjusting your dose. Our telemedicine providers are available to assist with any questions or concerns you may have. The generic name refers to the chemical composition of the drug, while the brand name is assigned by the manufacturer. In this article, the generic name is listed in parentheses. Sildenafil is prescribed for various conditions, with the dosage depending on the specific condition being treated. Alpha-blockers (e.g., doxazosin, tamsulosin): These medications are used to treat high blood pressure or prostate conditions.