Sildenafil Citrate for Female Sexual Arousal Disorder

Sildenafil first gained FDA approval on March 27, 1998. Do not take sildenafil if you are also using a nitrate drug for chest pain or heart problems, including nitroglycerin, isosorbide dinitrate, isosorbide mononitrate, and some recreational drugs such as "poppers".

Other Treatments for Low Libido

Sildenafil tablets (25 mg, 50 mg, 100 mg; Viagra, generic) and sildenafil oral film (25 mg, 50 mg, 75 mg, 100 mg; Vybrique) are used for ED. Sildenafil tablets (20 mg; Revatio, generic), sildenafil oral suspension (Revatio, generic), and sildenafil injection (Revatio, generic) are used for PAH. Sildenafil is a phosphodiesterase type 5 (PDE5) sildenafil premature ejaculation inhibitor, which breaks down cyclic GMP and enhances nitric oxide (NO) -mediated smooth muscle relaxation. In erectile dysfunction (ED), this increases blood flow to penile tissue, facilitating an erection. In pulmonary arterial hypertension (PAH), it dilates pulmonary vessels by the same mechanism, reducing pulmonary blood pressure and improving exercise capacity. Taking sildenafil with a nitrate medicine can cause a sudden and serious decrease in blood pressure.

Some medicines can cause unwanted or dangerous effects when used with sildenafil.

Two Medicines

Doppler studies revealed a decreased pulsatility index with sildenafil use, and in 3 of the 4 women, a significantly thicker endometrium was achieved with the addition of sildenafil. In a recent comparative prospective study,[23] they compared the effect of vaginal sildenafil citrate and estradiol valerate on EM, blood flow, and pregnancy rates in primary or secondary infertility women undergoing intrauterine insemination (IUI). Patients were evaluated by transvaginal sonography on day 13th of cycle for EM and pattern with number and size of Graafian follicle. Sildenafil significantly increased the endometrial blood flow in comparison to estradiol valerate. The EM and trilaminar pattern of endometrium were comparable in both groups.

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Sildenafil marginally increased pregnancy outcome in patients undergoing IUI. Sildenafil acts as a specific PDE-5 inhibitor, hence augments the vasodilatory effects of nitric oxide by preventing the degradation of cGMP, which leads to increase uterine blood flow and thicker endometrium. [7] Alternatively, another study suggested that sildenafil may have an effect on vasoactive cytokines that regulate endometrial development or implantation. They found that sildenafil increases uterine receptivity by the development of spiral arteries and increasing uterine arterial blood flow. [21] They recommended the routine use of oral sildenafil citrate in patients with a previous failure of assisted reproduction technology cycles due to poor EM. Tell your doctor about all your current medicines, especially riociguat (Adempas).

MeSH terms

[19] Sildenafil being a selective PDE5 isoenzyme inhibitor enhances the effect of nitric oxide by inhibiting PDE5, which is responsible for degradation of cGMP [Figure 1]. [20] Nitric oxide synthase isoforms have been identified in the vascular muscles of both human endometrium and myometrium. [21] With the use of sildenafil, cGMP remains elevated, which leads to vascular relaxation and increased blood flow to the endometrium. Clinical trials have shown that sildenafil is not useful in angina pectoris because of its many adverse drug reactions. Adverse effects of sildenafil are mainly related to the vasodilation caused by PDE-5 enzyme inhibition.

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[22] It causes headache, nasal congestion, dizziness, facial flushing, hypotension, and loose motions. Few cases of sudden loss of vision due to nonarteritic ischemic optic neuropathy are recorded. Sildenafil potentiates the vasodilation effect of nitrates, results in fall in BP and myocardial infarction. Therefore, it is contraindicated in patients of coronary heart disease, and caution is advised in the presence of liver or kidney disease, peptic ulcer, and bleeding disorders. It can predispose to priapism in patients with leukemia, sickle cell anemia, and myeloma. The most common side effects of sildenafil tablets for ED are: Abnormal vision, such as changes in color vision (such as having a blue color tinge) andblurred vision The most common side effects of sildenafil oral

• Sildenafil may improve blood flow to the clitoris, aiding arousal.
• Use caution with grapefruit or grapefruit juice, which can affect drug levels.
• Document any pre-existing medical conditions before starting sildenafil.
• Sildenafil may cause dizziness; avoid activities requiring alertness.
• Women with liver or kidney impairment should consult a physician first.
• The drug is not a hormone; it works on blood vessels.
• Patients should report any sustained erections or discomfort.
• Combining sildenafil with certain antidepressants may alter effectiveness.
• Keep track of any changes in sexual satisfaction or function.
• Sildenafil should be used as part of a comprehensive treatment plan.
• Avoid using sildenafil with recreational drugs that affect the cardiovascular system.
• Always follow up with your healthcare provider for ongoing assessment.

film for ED are: Abnormal vision, such as changes in color and blurred vision The most common side effects of sildenafil tablets/ oral suspension, and injection for PAH are: Sildenafil can cause the following serious side effects.

Patients and Methods

Two sildenafil generic small cohort studies denoted that the use of vaginal sildenafil improved uterine artery blood flow and sonographic endometrial appearance. [2629] Sildenafil was reported to augment baseline and estrogen-induced uterine blood flow in surgically menopausal ovine model. [30] Another effect of sildenafil has been described in women with recurrent miscarriages; it has shown to reduce natural killer cell activity in addition to the endometrial growth facilitating effect. [27] VEGF, produced by the epithelial cells, contributes to angiogenesis and increased vascular permeability in the mid-secretory phase, which is necessary for successful implantation, VEGF expression is highest in the mid-secretory phase. A study showed the VEGF protein expression analyzed by Western blotting was significantly lower in the thin endometrium group than that in the normal-thickness endometrium group.

Missed Dose

[2] Therefore, low VEGF levels in the thin endometrium due to impaired epithelial layer leads to implantation failure and poor endometrial receptivity. Sildenafil citrate stimulated the angiogenic responses of VEGF. A study failed to demonstrate the beneficial effect of sildenafil on thin endometrium, has been reported in women treated with estrogen and sildenafil citrate. Neither vaginal estrogen nor sildenafil significantly improved EM or blood flow in the subsequent frozen embryo transfer (ET) cycle. [33] Thus, the use of sildenafil cannot be expected to help all patients with a thin endometrial lining. Sildenafil can decrease blood flow to the optic nerve of the eye, causing sudden vision loss.

This has occurred in a small number of people taking sildenafil, most of whom also had heart disease, diabetes, high blood pressure, high cholesterol, or certain pre-existing eye problems, and in those who smoked or were over 50 years old.

• Sildenafil citrate tablets should be taken with water, not with food.
• Always follow the healthcare provider’s dosage instructions precisely.
• Use sildenafil only under medical supervision if you have health issues.
• Patients should start with lowest effective doses to assess response.
• Report any signs of allergic reactions like rash or swelling immediately.
• Regular check-ups can monitor for any cardiovascular changes.
• Always verify the legitimacy of the medication source.
• Sildenafil may cause hypotension in susceptible women.
• Consider lifestyle modifications to enhance sexual health benefits.
• The drug's effects typically last 4-6 hours.
• Be cautious of counterfeit sildenafil products available online.
• Educate yourself on potential drug interactions before use.

Stop taking sildenafil and call your healthcare provider right away if you havesudden vision loss in one or both eyes.

Efficacy of Sildenafil Citrate on Female Sexual Dysfunction in A Sample of Egyptian Females, A Prospective Placebo Controlled Study

A search was conducted using PUBMED, SCOPUS, and COCHRANE database and focused on peer-reviewed, randomized controlled trials, and observational studies using the keywords: "Sildenafil," "endometrium," "endometrial thickness," "implantation," and "In vitro fertilization" [represented in [Figure 2]. We mainly focused on the effect of sildenafil on EM. All references were scanned from identified articles for additional relevant information. After all the data had been extracted, a table was constructed with respect to first author, study design, patient settings, study groups, outcomes, and conclusion [Table 1]. In one observational study, administration of vaginal sildenafil for 5 weeks improved EM in women with a history of recurrent miscarriage.

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[27] Many observational groups also found that administration of vaginal sildenafil up to 10 days improved EM in 70% of the women with at least two consecutive prior in vitro fertilization (IVF) failures attributed to inadequate endometrial development. Among them, implantation sildenafil oral jelly 100 mg and ongoing pregnancy rates were 29% and 45%, respectively. In another study, vaginal sildenafil as well as oral estrogen was administered only in a luteal phase up to 11 days. Sildenafil was administered vaginally at a dosage of 25 mg, once a day, showed beneficial impact on the uterine receptivity. [25] Sher and Fisch evaluated the effect of sildenafil vaginal suppository, on endometrial development in 4 women who had a history of failed 3 artificial reproductive techniques cycles with good ovarian stimulation and thin endometrium (<8 mm). If you have these symptoms, stop taking sildenafil and contact a doctor right away.

In addition, heart attack, stroke, irregular heartbeats, and death have happened rarely in people taking sildenafil.

Mechanism of Action of Sildenafil on Endometrium

Women with intractable damage to the basal endometrium may be less likely to respond to increased uterine blood flow. Response to sildenafil is also predicated on an adequate serum estrogen level. The adverse effects of oral sildenafil citrate reported in a trial were, mild to moderate in nature and dose related, included headache, flushing, blurring of vision, nausea, and dyspepsia. [25] Another study showed that vaginal sildenafil suppositories are free from side effects related to oral sildenafil. [26] It has been claimed that on their ongoing 3-year experience, the administration of vaginal sildenafil has been totally free of clinical side effects.

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Luteal supplementation of sildenafil citrate (oral or vaginal) and oral estradiol valerate can be used for improving the EM, therefore can be used as an adjuvant therapy in patients with thin endometrium. Sildenafil when compared to estradiol valerate has a better outcome in terms of uterine receptivity, endometrial vascularity, and marginally increased pregnancy outcome in patients undergoing IUI or IVF-ET. Furthermore, participants tolerated well vaginal sildenafil with minimal adverse effects. Future studies to evaluate the sildenafil effect on fetal outcome in pregnant women and large sample size clinical trials are needed. Implantation; sildenafil citrate; thin endometrium; uterine receptivity Pronunciation: sil-DEN-a-fil Generic name: sildenafil Brand names: Revatio, Viagra, Vybrique Dosage form: tablets (20 mg; 25 mg, 50 mg, 100 mg), injection (10 mg/12.5 mL), oral suspension (10 mg/mL), oral film (25 mg, 50 mg, 75 mg, 100 mg) Drug classes: Agents for pulmonary hypertension, Impotence medications Sildenafil is used to treat erectile dysfunction (ED) in adult men or pulmonary arterial hypertension (PAH) in adults and children, depending on the brand or formulation.