Standard sildenafil dosage for erectile dysfunction: 25–100 mg tablet taken only once daily at least one hour before sexual activity Standard sildenafil dosage for erectile dysfunction: 25–100 mg tablet taken only once daily at least one hour before sexual activity Maximum sildenafil dosage for erectile dysfunction: 100 mg daily Maximum sildenafil dosage for erectile dysfunction: 100 mg daily Pulmonary hypertension is when the blood pressure in the arteries of the lungs is higher than normal.
In case of emergency/overdose
Avoid taking sildenafil with nitrates (medications for chest pain) such as isosorbide dinitrate, isosorbide mononitrate, nitroglycerin, and alpha-blockers or other blood pressure medications like riociguat. If you have a condition that puts you at higher risk of priapism—like sickle cell anemia, leukemia, Peyronie’s disease, or multiple myeloma—you should avoid sildenafil. There isn’t enough data to say whether sildenafil is safe for people with this eye condition. Sildenafil can interact with the nitrites found in certain recreational drugs popularly known as “poppers,” causing a dangerous drop in blood pressure. Don’t mix sildenafil with other ED drugs, like Cialis®, Levitra®, Revatio® (another brand name for sildenafil) or Stendra®.
Less common
This can put you at risk for sildenafil 100 mg tab low blood pressure. More of something isn’t always better! Aside from heart medications and other PDE5 inhibitors, taking sildenafil with ritonavir, ketoconazole, itraconazole, or clarithromycin (an antibiotic) can increase the concentration of sildenafil in your body and make you more likely to experience side effects. Talk with a healthcare professional before mixing sildenafil with over-the-counter supplements, which aren’t regulated in the same way as prescription drugs. Learn more about health and drug interactions in our sildenafil interactions guide.
If you take more than the recommended amount of Viagra
If you’re living with ED symptoms, you’re not alone. Sildenafil can make it easier to get and keep an erection so you can enjoy a fulfilling sex life. Here’s what to remember when taking sildenafil for ED: Take it at least 30 to 60 minutes and no more than four hours before sexual stimulation. Also, avoid high-fat foods or meals that can slow absorption. Take it at least 30 to 60 minutes and no more than four hours before sexual stimulation. This makes the heart work harder to pump blood through the lungs.
- The drug belongs to the phosphodiesterase inhibitor class.
- It can cause nasal congestion and dyspepsia.
- It is not intended for recreational use.
- Effectiveness may vary among individuals.
This can lead to heart damage and cause symptoms such as shortness of breath, chest pain, and lightheadedness.
| Condition | Recommendation | Rationale |
|---|---|---|
| Temperature | Store at room temperature (20-25°C) | Prevents degradation |
| Light exposure | Keep in original container, away from light | Maintains drug stability |
| Humidity | Keep dry, avoid bathroom storage | Prevents moisture damage |
Pulmonary hypertension affects about 1% of the population.
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Kamagra Oral Jelly | 100mg | 30 + 5 Sachets | 136.20€ 129.71€ | |
| Viagra Generic | 200mg | 270 + 10 Pills | 379.76€ 361.68€ | |
| Kamagra Soft Tabs | 100mg | 180 + 8 Pills | 425.45€ 405.19€ | |
| Viagra Generic | 50mg | 120 + 6 Pills | 129.64€ 123.47€ | |
| Viagra Generic | 100mg | 360 + 10 Pills | 330.21€ 314.49€ | |
| Viagra Generic | 25mg | 90 + 6 Pills | 105.03€ 100.03€ | |
| Viagra Generic | 100mg | 60 + 4 Pills | 96.36€ 91.77€ | |
| Kamagra Polo | 100mg | 60 + 4 Pills | 189.39€ 180.37€ | |
| Viagra Generic | 150mg | 270 + 10 Pills | 326.61€ 311.06€ | |
| Viagra Generic | 100mg | 270 + 10 Pills | 270.47€ 257.59€ | |
| Viagra Generic | 100mg | 30 + 4 Pills | 60.91€ 58.01€ | |
| Viagra Generic | 25mg | 10 Pills | 25.19€ 23.99€ | |
| Viagra Generic | 150mg | 60 + 4 Pills | 111.25€ 105.95€ |
Pulmonary hypertension has many potential causes, including heart disease, lung disease, medications, and other health conditions.
How Much Sildenafil is Too Much?
Read our guide on how to use Viagra for best results. It doesn’t really matter if you forget to take sildenafil because it’s designed for you to take it as you need it. But be careful about accidentally doubling up on doses. Missing a dose before sex is no big deal, though doing so may impact the quality of your erection. However, forgetting you already took sildenafil and taking a subsequent dose within 24 hours can lead to complications, particularly if you go over 100 milligrams total.
Drug Interactions
You should be aware of the potential side effects when taking any new drug. The most common side effects of sildenafil include: Most of these mild side effects will go away on their own as your body adapts to taking sildenafil. But sildenafil also comes with some more rare but potentially serious side effects like: Sudden loss of vision (potentially a sign of non-arteritic anterior ischemic optic neuropathy or NAION) Sudden loss of vision (potentially a sign of non-arteritic anterior ischemic optic neuropathy or NAION) Priapism (a painful erection lasting longer than four hours) Priapism (a painful erection lasting longer than four hours) If you experience any of these symptoms after taking sildenafil, seek immediate medical attention. And FYI: Even mild side effects can impact your life. If you get an upset stomach every time you take sildenafil, talk with a healthcare professional.
What’s the dosage of Cialis vs. Viagra?
They may recommend changing your dose or switching medications altogether. Read more about potential sildenafil reactions in our sildenafil side effects guide. It might be dangerous to use sildenafil if you have certain medical conditions or take specific drugs. If your healthcare provider told you not to engage in sexual activity because of a heart condition (like a history of heart attack; heart disease; heart failure; angina; or arrhythmia, also known as an irregular heartbeat), it’s probably best to abstain from having sex and taking sildenafil. Using sildenafil when you take medicines for high blood pressure or pulmonary arterial hypertension could cause a dangerous, potentially life-threatening dip in blood pressure. Physicians will focus on treating those problems, but they will also use drugs like sildenafil to lower blood pressure.
See also:
Don’t mix sildenafil with medications that can cause dangerous interactions. Unsure whether your meds are safe to combine with sildenafil? Regular exercise, a balanced diet, and quality sleep can maximize your overall health and sexual well-being. Consider alternative treatments if sildenafil doesn’t work for you. Other oral erectile dysfunction medications include tadalafil (generic for Cialis), avanafil (Stendra), vardenafil, and chewable Hard Mints.
Some side effects can be serious. If you experience any of the following symptoms, call your doctor immediately:
Your healthcare provider might also recommend adjusting your sildenafil dosage. Ready to find an erectile dysfunction treatment that works for you? Get advice from one of our healthcare providers to learn more about your options. Don’t be tempted to use expired medicines. Gianmarco Troiano & Giacomo Lazzeri (2021) The potential toxic combination of grapefruit juice and sildenafil, Toxin Reviews, 40:3, 334-337.
Typical dosages
Sildenafil citrate induced retinal toxicity-electroretinogram, optical coherence tomography, and adaptive optics findings. Do food and dose sildenafil citrate drug timing affect the efficacy of sildenafil? Sildenafil treats erectile dysfunction or pulmonary hypertension (high blood pressure in the arteries that send blood to the lungs for oxygen). Dosage strengths and dosage schedules are very different for these two medical conditions. Men using sildenafil for erectile dysfunction should take a sildenafil dose only as needed one hour before anticipated sexual activity. Sildenafil is taken orally three times daily and can range from 60 mg to 240 mg.
- Sildenafil is not a cure but a treatment option.
- Lifestyle changes can improve erectile health.
- Regular exercise and balanced diet are beneficial.
- Communicate openly with your healthcare provider.
Sildenafil injections are limited to 30 mg per day.
| Country/Region | Legal Status | Available Over-the-Counter | Prescribed Required |
|---|---|---|---|
| USA | Prescription only | No | Yes |
| UK | Prescription required | No | Yes |
| Canada | Prescription only | No | Yes |
| Australia | Prescription required | No | Yes |
For pulmonary hypertension, people may be prescribed generic sildenafil or a brand-name version called Revatio. Standard sildenafil dosage for pulmonary hypertension: 20–80 mg taken orally three times daily OR 10 mg intravenous injection three times daily Standard sildenafil dosage for pulmonary hypertension: 20–80 mg taken orally three times daily OR 10 mg intravenous injection three times daily Maximum sildenafil dosage for pulmonary hypertension: 240 mg taken orally OR 30 mg daily administered as intravenous injections Maximum sildenafil dosage for pulmonary hypertension: 240 mg taken orally OR 30 mg daily administered as intravenous injections Healthcare professionals use sildenafil to treat pulmonary hypertension in children as young as 1 year old.
- Take sildenafil on an empty stomach for faster effect.
- It typically takes about 30-60 minutes to work.
- Its effects can last for up to 4-6 hours.
- Proper hydration can enhance its effectiveness.
Children can take tablets or an oral suspension.
Drug Interactions for Revatio
For erectile dysfunction, men take a pill when needed, but no more than one dose per day. No one who has had an allergic reaction to sildenafil will be prescribed this medicine. Popularly known as brand-name Viagra, sildenafil is widely used to treat erectile dysfunction (ED). Defined as an inability to achieve or maintain an erection, clinical erectile dysfunction affects more than thirty million men in the United States. This enzyme cGMP is needed because it causes smooth muscle relaxation and increased blood flow to the penis. Healthcare professionals do not use sildenafil injections in pediatric patients.
The Takeaway
Do not take another dose for 24 hours. People with pulmonary hypertension will take lower doses three times daily for the full duration of treatment. Sildenafil is a generic prescription drug that widens arteries. People know it far better as brand-name Viagra, a treatment for erectile dysfunction. This is what it’s popularly known for.
Missed Dose
However, sildenafil is also used to treat high blood pressure in the lung’s arteries, a condition called pulmonary hypertension. For erectile dysfunction, men should only take doses as needed before sexual activity. For pulmonary hypertension, doses are taken three times daily for as long as necessary. Sildenafil tablets are the most commonly used. Low-dose tablets (20 mg) are for pulmonary hypertension.
Usual Geriatric Dose for:
Higher-dose tablets are appropriate for erectile dysfunction. Patients with pulmonary hypertension can also take a liquid sildenafil or be given an intravenous injection. Tablets: 20 mg (pulmonary hypertension), 25 mg, 50 mg, 100 mg Tablets: 20 mg (pulmonary hypertension), 25 mg, 50 mg, 100 mg Oral suspension: 10 mg/mL (pulmonary hypertension) Oral suspension: 10 mg/mL (pulmonary hypertension) Injection: 10 mg/12.5 mL (pulmonary hypertension) Injection: 10 mg/12.5 mL (pulmonary hypertension) Sildenafil is FDA-approved for erectile dysfunction and pulmonary hypertension. Healthcare professionals may use the drug off-label for other conditions, such as Raynaud’s syndrome or altitude sickness, but these are not approved uses. For pulmonary hypertension, low-dose sildenafil is administered daily for as long as necessary. When sildenafil is used for pulmonary hypertension, no dosage reductions are required for people with kidney disease or liver problems.
Uses for Revatio
By blocking PDE-5, cGMP increases, and erections can occur. Tablets are taken at sildenafil generic least one hour before anticipated sexual activity, but men could take their dose a half hour to four hours before sexual activity. However, a dose starts to lose its potency about two hours after a dose is taken. Sexual stimulation is required for the drug to work. Men will start on a 50 mg dose which can rise to 100 mg if necessary.
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