Sildenafil citrate, tadalafil and vardenafil hydrochloride are contraindicated in patients with a known hypersensitivity to any organic nitrates (oral, sublingual, transdermal or by inhalation) due to the risk of developing potentially life-threatening hypotension. Concomitant use of PDE-5 inhibitors is contraindicated with HIV protease inhihibitors (indinavir, ritinovir, saquinavir) as well as ketoconazole, itraconazole, cimetidine and erythromycin, because these drugs are potent inhibitors of cytochrome P450 3A4 and can raise the plasma levels of PDE-5 inhibitors. Coadministration of PDE-5 inhibitors to patients taking alpha-adrenergic blockers such as alfluzocin or tamsulosin may lead to symptomatic postural hypotension, including dizziness and lighheadedness in some individuals.
There have been some studies to suggest that a placebo effect that improves ED may work for some men. One study found that men taking an oral placebo pill showed as much improvement in ED symptoms as men who took actual medication to improve ED. Conversely, men who were given therapeutic suggestions to improve ED did not see signs of symptom improvement.
The field visits and excursions were arranged with the healers for places far from their homesteads or took place concurrently with the interviews and discussions. When going to the forests, game reserves or other areas where herbalists collect plant specimens, prior arrangements were made with the community leaders and park staff. This was done with individuals or groups depending on where the herbs are collected. In the shared areas such as the fishing villages, or the multiple use areas, group and individual excursions were conducted. Some of the medicinal plants that are harvested from distant places such as the Democratic Republic of Congo, other districts and unsafe areas within the reserve were not collected but their local names were recorded. The data collected were to supplement the information on plant names, plant parts used, collection of the herbarium voucher specimens and conservation status of these medicinal plants. The medicinal plants collected were given the voucher numbers and then later identified in Botany Department herbarium of Makerere University.
Deer antlers (Cervi pantotrichum): the most popular of sexual tonics. In the Chinese medical teaching, kidneys control sexual function; hence foods and herbs such as this can invigorate impotency and infertility increasing semen production as well (5). Best quality are from young bucks with new horn still in velvet with blood visible in the cartilage.
Phytolacca dodecandra leaves and roots are pounded and smeared on ripe banana and then the ripe banana roasted before being eaten for treating erectile dysfunction. However, care has to be taken Phytolacca dodecandra is poisonous. Cola acuminata fruits are mixed with other plants in Benin to treat primary and secondary sterility24. Cola acuminata is also said to be diuretic and laxative when administered orally24. Some Acacia species are regarded as aphrodisiacs in Niger2. Cassia species have high repute as drugs and poisons. For instance, Cassia sieberiana is used urinary problems, impotence and kidney diseases in Mali24. In Burkina Faso, Cassia occidentalis is used as a stimulant24. Flueggea virosa is famous medicine in African cultures. Flueggea virosa used in sterility, aphrodisiacs, stimulant, rheumatism, arthritis, spermatorrhoea, kidney and liver problems among many other diseases treated17,24.
Currently, there are four orally active drugs are available to treat ED. These include: sildenafil citrate (Viagra [Pfizer, USA]), vardenafil hydrochloride (Levitra [Bayer, Germany]), tadalafil (Cialis [Eli Lilly, USA]) and avanafil (Stendra, Spedra [Vivus Inc, USA]). These drugs inhibit the enzyme phosphodiesterase type 5 (PDE-5), which is responsible for the hydrolysis of cGMP. PDE-5 inhibitors and cGMP act as effectors of dilation of smooth muscle of cavernosal bodies. PDE-5 inhibitors are contraindicated in patients taking any kind of nitrate therapy for angina, and may not be appropriate for men with certain health conditions, such as severe heart disease, heart failure, history of stroke or heart attack, uncontrolled high blood pressure or diabetes, and patients with pigmental retinopathy. PDE-5 inhibitors are less effective in men with diabetes and men who have been treated for prostate cancer. PDE-5 inhibitors are also not effective in men with retinitis pigmentosa, a genetic disease involving PDE-5 deficiency. The common side effects of PDE-5 inhibitors include gastrointestinal upset, headache, nasal congestion, back pain and dizziness. The PDE-5 inhibitors may interact with other medications including antihypertension drugs. Nonetheless, the PDE-5 inhibitors are generally safe and effective for most men. The primary mechanism of action of these drugs is through the mediation of NO. NO is one of the key molecules involved in ED. It is a short-lived, highly permeable, pleiotropic, gaseous molecule, secreted from the postganglionic cavernosal parasympathetic nerves, endothelium of the cavernosal blood vessels, platelets in the cavernosal sinuses and phagocytic cells (monocytes, macrophages and neutrophils). NO acts on platelets to inhibit platelets adhesion and aggregation. NO causes relaxation of the smooth muscle of the cavernosal blood vessels of the penis, leading to vasodilation, tumescence and stimulation. Release of NO in the corpus cavernosum of the penis during stimulation activates the enzyme guanylate cyclase, which results in increased levels of cGMP, producing smooth muscle relaxation in the corpus cavernosum and resulting in increased blood flow (5). NO is mainly produced from cavernosal nerves, which are nonadrenergic, noncholinergic nerves within the penis, and acting via its second messenger cGMP. It has been suggested that maintaining normal body weight and mild exercise, as well as dietary supplementation of folic acid, zinc, calcium, vitamin C, vitamin E and L-arginine, a precursor of NO, can support the biochemical pathway leading to NO release . NO is an effector molecule that is involved in a number of intracellular functions such as vasorelaxation, endothelial regeneration, inhibition of leukocyte chemotaxis and platelet adhesion . A small proportion of autonomic nerves do not release either Ach or norepinephrine . For example, the cavernous nerves predominantly release NO in the penis. The exact mechanism is not known, but it is believed to be through increased intracellular calcium. Another gaseous molecule produced in the corpora cavernosa is hydrogen sulphide (H2S), which is also known to be involved in erectile function . H2S activates ATP-sensitive potassium channels in smooth muscle cells. Some reports indicate that NO acts in large vessels and H2S in small vessels. A high level of tumour necrosis factor-alpha has been shown in ED patients . Although current ED therapies using PDE-5 inhibitors are safe and effective, approximately 40% of ED patients do not respond to currently available treatment [11,12]. For these patients, herbal therapy may be useful.
The key respondents were mainly old men, male traditional healers, traditional birth attendants and young women and all in total about 160 traditional healers were interviewed. To document male related ailments men are particularly more knowledgeable and most men share their problems with men. In addition, the old men and healers are the ones in charge of administering these herbal remedies. Young women through the informal discussions, interviews and market surveys are particularly more dynamic in the use of herbs for themselves, husbands and children besides being the most active reproductive age group. The medical ethnobotanical data collected has been analysed, medicinal plants from the study areas have been listed and methods of administering the herbal drugs were also documented. In checking for the proper updated naming, spellings and authors of the medicinal plants, besides using voucher specimens in Makerere University Herbarium, several reference books were used1,3,9,15,16,20,22,27.
3. Testosterone replacement. Before oral medications like Viagra, testosterone was routinely used to treat erectile dysfunction as it is central in the male sexual response, including the desire for sex and the process of getting an erection. Testosterone can be administered in a number of ways, for example orally, by means of an injection, skin patch, or subcutaneous (under the skin) pellet.
This calls for serious conservation strategies of plant targets in drug development borrowing from the indigenous knowledge of the local people. For instance, medicinal plants documented in this study like Warburgia ugandensis and Cirtopsis articulata used in erectile dysfunction and sexual impotence and ED need to be conserved based on their demand and medicinal value to the people. In the event of increased biotechnology and the use of modified living organisms in agriculture, health and environment, most people will go for natural products18,26. Furthermore, research in natural products is on the increase in both developed and developing nations to show that there is renewed interest in medicines of natural origin.
If you have symptoms of ED, it’s important to check with your doctor before trying any treatments on your own. This is because ED can be a sign of other health problems. For instance, heart disease or high cholesterol could cause ED symptoms. With a diagnosis, your doctor could recommend a number of steps that would likely improve both your heart health and your ED. These steps include lowering your cholesterol, reducing your weight, or taking medications to unclog your blood vessels.