Nonsurgical Treatment of Erectile Dysfunction (cont.)
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How Do Venous Constriction Devices Treat Erectile Dysfunction?
The venous constriction device is a device designed to compress the veins that drain blood flow out of the penis to keep blood in the penis. These devices may help individuals who have a "venous leak." In these individuals, although blood flow is coming into the penis, it is draining out at the same time and this persistent drainage prevents a fully rigid erection. These devices may be used with other forms of medical therapy, such as medications, injection therapy, or the vacuum device.
What Medications Treat Erectile Dysfunction?
Medications can be used to treat impotence, some of which are discussed below. For a more complete discussion, see Erectile Dysfunction Medications. Currently, oral medical therapy is considered the first line therapy in men with erectile dysfunction who have no contraindications to its use.
Phosphodiesterase type V inhibitors (PDE-5 inhibitors) are the most commonly used therapy for erectile dysfunction. These medications work by preventing the breakdown of chemicals that stimulate increased blood flow into the penis. Several different PDE-5 inhibitors are available, which differ slightly in how to use them and their side effects. They appear to be equally effective in the treatment of erectile dysfunction in general, but some individuals may respond to one of these medications more effectively than another.
Although these medications are the most commonly used for erectile dysfunction treatment, there are some individuals in whom these medications should not be used:
PDE-5 inhibitors are contraindicated in men taking any form of nitrates, such as nitroglycerin and in men taking guanylate cyclase inhibitors.
These medications should not be used in individuals with a condition called retinitis pigmentosa.
Caution is recommended regarding the use of PDE-5 inhibitors and alpha-blockers (for example, Hytrin, Cardura, Uroxatral, Flomax, Rapaflo), medications commonly used to treat benign prostate enlargement (BPH). The combination of these medications can cause lowering of the blood pressure. Stable use of one therapy should occur prior to the addition of the other therapy, which should start at a low dose.
Currently, there are four different PDE-5 inhibitors available, sildenafil (Viagra), vardenafil (Levitra), tadalafil (Cialis), and avanafil (Stendra). All of these medications require sexual stimulation to achieve an erection. None of these medications will improve sexual desire, nor will they improve normal erections.
Viagra is available in three strengths: 25 mg, 50 mg, and 100 mg. Viagra works best if taken on an empty stomach about 30-45 minutes before sexual activity. Optimal results may not be realized until the medication has been tried six to eight times. Viagra may be used cautiously with alpha-blocker medications as long as sufficient time has passed between their dosing.
Levitra is available in two strengths: 10 mg and 20 mg. It is not necessary to take it on an empty stomach. Levitra should be started at low dose in men taking certain medications called CYP3A4 inhibitors (ketoconazole, medications for HIV, and clarithromycin) and should be not be used in individuals with a known heart problem called prolonged QT interval or with medications that prolong the QT interval.
Cialis is available in three strengths: 5mg, 10 mg, and 20 mg. Cialis can work in 30 minutes, but peak results usually take longer. Cialis has the advantage of a much longer period (24-36 hours) during which sexual ability is increased. The newest formulation of Cialis is the 5 mg dosage for daily use. The major advantage of daily dosing is that it allows for spontaneous sexual activity.
Stendra is available in three strengths: 50mg, 100 mg, and 200 mg. Stendra can work as rapidly as 15-30 minutes and can be taken with food or alcohol.
Side effects of Viagra, Levitra, Stendra, and Cialis include the following:
Your physician will determine which of these medications is most appropriate for you and the optimal dosage, which may vary with other health problems that you may have. Never give any of these medications to anyone else as they can cause serious problems due to drug interactions if not monitored by a physician.
Certain street drugs (for example, ecstasy) can also cause serious problems if taken with Viagra, Levitra, Stendra, or Cialis.
Medically Reviewed by a Doctor on 9/11/2017
Pamela I. Ellsworth, MD
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