The doses of Viagra should be taken between 4 to 6 hours apart when used for pulmonary arterial hypertension.
| Dose (mg) | Frequency per Day | Effect Duration (hours) | Side Effects Possible |
|---|---|---|---|
| 25 | Once | 4–6 | Mild headache, flushing |
| 50 | Once | 4–6 | Dizziness, nasal congestion |
| 75 | Once | 4–6 | Heartburn, back pain |
| 100 | Once | 4–6 | Visual disturbances, nausea |
It takes a finely choreographed series of events to produce an erection. It begins with arousal signals from your brain, and it all hinges on good blood flow to the penis. Within the penis are two chambers called the corpora cavernosa. Nitric oxide is released viagra tablet sex in the chambers during sexual stimulation. Nitric oxide activates an enzyme called guanylate cyclase. This increases cyclic guanosine monophosphate (cGMP) levels, which causes muscles to relax.
The chambers also contain a network of blood vessels. When those blood vessels relax and widen, blood rushes in.
It’s effective, but it can also cause some side effects. PDE5 is an enzyme that regulates certain chemicals in your blood, but because of its effect on the body, it can make it harder for you to get and keep an erection. While it helps you temporarily maintain an erection so you can have sex, it does not cure ED. It does not affect sexual desire either. You still need mental or physical stimulation to get an erection.
This medication is only available with a doctor’s prescription. The appropriate dosage of Viagra may vary between people. Your doctor will be able to determine the proper dosage for you. The number of doses taken daily depends on why Viagra is being used. Adults aged up to 64 years old typically take 50 milligrams (mg) 1 hour before sexual intercourse, no more than once a day.
For adults ages 65 and older using Viagra for erectile dysfunction, or for those with cirrhosis or severe renal impairment, the average dose is 25 mg as a single dose, taken 1 hour before sexual intercourse, but no more than once a day. Viagra may also be taken between 30 minutes to 4 hours before sexual intercourse. Your doctor may adjust your dosage to meet your needs. Viagra may also be used for pulmonary arterial hypertension. When used for this purpose, the average dose is 5 to 20 mg of Viagra taken 3 times a day. The resulting pressure is what causes an erection. PDE5 can dampen the effect of cGMP.
| Condition | Risk Level | Recommended Action |
|---|---|---|
| Severe Heart Disease | High | Consult doctor before use |
| Nitrate medication use | Very High | Do not take Viagra without medical approval |
| Liver impairment | Moderate | Dose adjustment or avoid use |
| Vision loss (NAION) | High | Avoid or consult healthcare professional |
Viagra is rapidly absorbed into the bloodstream. Maximum concentrations are reached within about an hour. One of the more common side effects is flushing, redness or other color changes, or other discoloration. This medication can also cause a decrease in blood pressure, particularly 1 to 2 hours after taking it. If you already have low blood pressure, discuss the pros and cons of Viagra with your doctor. For most people, sexual activity is good for cardiovascular health. However, if you have cardiovascular disease, ask your doctor if it’s safe for you to take Viagra. You should also avoid Viagra if your doctor advises you not to have sex. You should not take Viagra if you’ve had a stroke or heart attack or if you have unstable angina. Certain drug interactions can harm your heart. Avoid taking PDE5 inhibitors if you also use long-lasting alpha-blockers or take medications that contain nitrates. Viagra can be quite effective, but it’s no magic pill. You still need some kind of stimulation to get an erection. The effects of Viagra usually last about 4 hours, though they may last longer for some men. A rare but serious side effect is priapism.
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Viagra Super Active | 100mg | 20 + 4 Pills | 48.05€ 45.76€ | |
| Viagra Original | 100mg | 92 + 4 Pills | 362.88€ 345.60€ | |
| Viagra Oral Jelly | 100mg | 63 + 7 Sachets | 190.54€ 181.47€ | |
| Viagra Professional | 100mg | 30 Pills | 88.92€ 84.69€ | |
| Viagra Professional | 100mg | 60 + 2 Pills | 146.74€ 139.75€ | |
| Viagra Professional | 100mg | 360 + 6 Pills | 527.09€ 501.99€ | |
| Viagra Oral Jelly | 100mg | 220 + 18 Sachets | 562.28€ 535.50€ | |
| Viagra Generic | 25mg | 180 + 6 Pills | 154.93€ 147.55€ | |
| Viagra Generic | 150mg | 20 Pills | 55.02€ 52.40€ | |
| Viagra Generic | 150mg | 270 + 10 Pills | 326.61€ 311.06€ | |
| Viagra Generic | 200mg | 60 + 4 Pills | 125.19€ 119.23€ | |
| Viagra Generic | 25mg | 10 Pills | 25.19€ 23.99€ | |
| Viagra Generic | 100mg | 60 + 4 Pills | 96.36€ 91.77€ | |
| Viagra Generic | 200mg | 360 + 10 Pills | 481.98€ 459.03€ | |
| Viagra Original | 100mg | 14 + 2 Pills | 89.03€ 84.79€ | |
| Viagra Generic | 50mg | 10 Pills | 26.87€ 25.59€ |
That’s when you get an erection that lasts for an extended period of time. If you have an erection that lasts for more than 4 hours, seek immediate medical attention.
You should also be wary of PDE5 inhibitors if you have an anatomical abnormality of the penis. If you have Peyronie’s disease, your doctor may advise against taking Viagra. Viagra is a temporary fix and does not cure ED.
| Side Effect | Severity Level | Onset Time | Management Tips |
|---|---|---|---|
| Headache | Mild to Moderate | Within 1 hour | Take pain relievers, hydrate |
| Flushing | Mild | Within 30 min | Cool compress, relax |
| Nasal congestion | Mild | Within 1 hour | Use decongestants |
| Dizziness | Moderate | Within 2 hours | Sit or lie down, hydrate |
It offers no protection from sexually transmitted infections (STIs). Viagra helps to improve blood flow to the penis, but your brain is still your most valuable sex organ. Viagra will not work if you’re not in the mood. Some potential side effects of Viagra are headache, runny or blocked nose, or a nosebleed. In rare cases, Viagra can cause fainting. Some men taking PDE5 inhibitors report back or muscle pain. It’s not common, but some men experience ringing in the ears, hearing loss, or vision loss after taking PDE5 inhibitors. Avoid PDE5 inhibitors if you have a history of non-arteritic anterior ischemic optic neuropathy (NAION), an eye condition characterized by the interruption of blood flow to the optic nerve. If you have hearing or vision loss while taking Viagra, seek immediate medical help. Viagra is dispensed in a film-coated tablet. You can take Viagra with or without food, and it’s best to take it about an hour before you plan to have sex. Do not take Viagra more than once per day. About 80 percent of Viagra leaves your body in your feces.
You can also take it anywhere from 30 minutes to 4 hours before sex. Your dose might be lower if you're an older adult or if you have liver or kidney problems. Your prescriber can also adjust the dose depending on how it works for you and if you have side effects. The maximum recommended dose is 100 mg. GoodRx has partnered with to provide reviews on the different aspects of Sildenafil (Viagra).
Learn more about the effectiveness of Sildenafil (Viagra) based on real life experiences. Based on 14 people taking this medication Based on 28 people taking this medication Based on 34 people who have taken this medication Based on 76 people who have taken this medication Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. Contraindications are specific health conditions or situations in which a person should not take a medication due to safety concerns. If you have any of the following conditions or if any of the cheap viagra with dapoxetine following apply to you, let your healthcare provider know because Sildenafil (Viagra) will not be safe for you to take. Taking a nitrate medication for chest pain (angina) Taking guanylate cyclase (GC) stimulators, such as Adempas (riociguat) History of allergic reaction to sildenafil (Revatio) Sildenafil (Viagra) increases blood flow to the penis so that you can get an erection.
But it may cause side effects, including light sensitivity and diarrhea. Certain side effects may need medical attention. Viagra may cause some unwanted side effects. tingling in the arms, feet, legs, or hands numbness in the arms, feet, legs, or hands trouble differentiating between colors like blue and green Viagra may also cause serious side effects that require immediate medical attention. sudden loss of or decrease in hearing an erection that lasts longer than 4 hours and may be painful Viagra is a powerful drug that increases blood flow to the penis so you can get and maintain an erection. The rest is washed out with your urine.
Your prescriber can decide if sildenafil (Viagra) is right for you based on the risks and benefits. Some people who took sildenafil (Viagra) had problems with hearing. Sometimes, this happened along with ringing in the ears (tinnitus) and dizziness. It's not clear if these problems are directly related to sildenafil (Viagra). If you notice any changes in your hearing in one or both of your ears, stop taking this medication and call your prescriber right away.
Risk factors: Taking nitrate medications Taking blood pressure medications Taking alpha blockers Taking certain antifungals or antivirals Taking other ED medications at the same time Sildenafil (Viagra) can interact with certain medications. These drug interactions can raise your risk of side effects, including dangerously low blood pressure. These include nitroglycerin (Nitrostat) and isosorbide dinitrate (Isordil). It can cause your blood pressure to drop too low. Sildenafil (Viagra) can also interact with blood pressure medications.
Other drug interactions are with certain antifungals and antivirals like ritonavir (Norvir). They can raise the risk of side effects like headaches and flushing. It's important to tell your prescriber and pharmacist about all the medications you take and plan to take. They can make sure all your medications are safe to take together and adjust them to keep you safe if needed. The typical dose is 50 mg taken by mouth about 1 hour before sex, as needed. One fairly common side effect of Viagra is indigestion or stomach upset. PDE5 inhibitors can sometimes cause nausea or vomiting.
Tell your prescriber about all your health problems and medications you take. Your prescriber can check that sildenafil (Viagra) is safe for you to take. If you take this medication, be very careful getting up after sitting or lying down. This can help prevent you from feeling dizzy from low blood pressure and possibly falling. Risk factors: Medical conditions that affect the penis Sickle cell anemia Multiple myeloma Leukemia It's not common, but some people who took sildenafil (Viagra) have had an erection that lasted more than 4 hours (priapism).
If it's not treated in time, it can lead to permanent damage to your penis. Tell your prescriber about your medical conditions. You're at higher risk of priapism if you have other conditions affecting your penis. The risk might also be higher if you have sickle cell anemia, multiple myeloma, or leukemia. If you have an erection that lasts longer than 4 hours or a painful erection, get medical help right away.
If you suddenly notice changes in your vision in one or both of your eyes, go to the emergency room or call your prescriber right away. Although this is rare, sildenafil (Viagra) might raise the risk of eye damage. This can potentially lead to permanent vision loss. Before starting sildenafil (Viagra), tell your prescriber about your full medical history. If your eye specialist has told you that you have a "crowded" optic disc, you might be at higher risk of vision changes with this medication. Viagra typically lasts between 2 and 5 hours before the effects start to wear off. It’s important to make sure to take this medication correctly and, ideally, take the tablet 30 to 60 minutes before you plan to engage in sexual activity.