Sildenafil Citrate and Endometrial Receptivity

Chronic endometritis reduced endometrial receptivity and altered uterine contractility leading to infertility.

• Sildenafil citrate can be prescribed off-label for female sexual dysfunction.
• Consult a doctor before using sildenafil citrate tablets for women.
• Side effects in women may include headache, flushing, or nasal congestion.
• Sildenafil works by increasing blood flow to enhance female arousal.
• Dosage for women varies; always follow medical advice.
• Sildenafil tablets may interact with other medications, like nitrates.
• Not approved by FDA specifically for female sexual dysfunction.
• Use with caution in women with heart conditions or high blood pressure.
• Possible benefits include improved libido and vaginal blood flow.
• Sildenafil should be taken on an empty stomach for best results.
• Long-term safety of sildenafil in women is not well established.
• Store sildenafil citrate tablets in a cool, dry place out of children’s reach.

[10] It can be due to various reasons such as infections due to tuberculosis or chlamydia or intrauterine devices.

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Therefore physicians are trying to use what they have.I will be the first one to discourage medication use unless it is something that can't be dealt with via other mechanisms. Seeing a sex therapist can be very helpful for many people because sexual dysfunction often has non-organic causes that cannot be solved by medication. That is not to say that pharmaceuticals do not have a place in the management of sexual dysfunction. That is why it is important to talk to a physician (better a sexual health physician) to discuss these matters.BTW, off-label use of medication is not uncommon at all. Every physician does it all the time.

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Just pointing out that its not something that is a rarity. Only a fraction of men using viagra actually have ED. Many men have other issues like low arousal, PE, etc. But most doctors give them viagra.Freedom is just another word for nothing left to lose - Kris Kristofferson and Fred Foster (sung by Janis Joplin)Comment Reply to Aging women, sex and hormonesAcesup I’m really happy to read this update. But because for the first time in a while I’m hearing something...05-20-2026, 07:41 PM By JonnyR Acesup I’m really happy to read this update. Clomiphene citrate used for ovulation induction can lead to thin endometrium because of its luteal phase defect (antiestrogenic effect on endometrium), which reduces the chances of implantation. A previous study has reported that a thin endometrium is characterized by high blood flow impedance of uterine radial artery, poor epithelial growth, decreased expression of VEGF, and poor vascular development. Hence, adjuvant sildenafil citrate tablet medications causing vasodilation have been suggested to be beneficial in women with thin endometrium. Several agents such as antithrombotic agents, aspirin,[11] and heparin have been evaluated by several groups. Heparin was found to improve pregnancy rates among women with thrombophilia and recurrent abortions.

[1314] Sildenafil, a phosphodiesterase 5 (PDE-5) inhibitor is now one of the standard treatments for erectile dysfunction (ED) since decades. [15] Beyond its urological scope, new therapeutic applications are being explored because of its vasodilatory property. Hence, here is an attempt to review the effect of sildenafil on the EM, which increases the pregnancy outcome, i.e. its utility in the management of female infertility.

Frequently asked questions

But my wife tells me I have an anxiety problem and make too big deal a deal out of things like...04-09-2026, 10:30 AM By Acesup This sounds like a stupid question from a guy like me. But my wife tells me I have an anxiety problem and make too big deal a deal out of things like.. Endometrial thickness (EM) is one of the strongest predictors of implantation rate and ongoing pregnancy success rate. The endometrial growth is dependent on the uterine blood flow and angiogenesis. Recently, some reports discussed the possible beneficial effects of sildenafil citrate on EM.

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Sildenafil citrate leads to smooth muscle relaxation and vasodilation. Because of these biological properties, it is a potential candidate for female infertility, especially in the management of thin endometrium, which leads to low implantation and pregnancy rates. An updated electronic search was performed through PUBMED, MEDLINE, and COCHRANE and focused on peer-reviewed, randomized controlled trials, and observational cohort or case-control studies for the role of sildenafil in thin endometrium. Systematic search through all the clinical studies showed favorable results. They documented the beneficial role of sildenafil citrate in the treatment of thin endometrium in failed in vitro fertilization-embryo transfer cycles, assisted intrauterine insemination cycles, or resistant endometrium, where it increased the uterine receptivity. Sildenafil (compound UK-92,480) was synthesized by Pfizer scientists Andrew Bell, David Brown, and Nicholas Terrett.

What side effects can this medication cause?

[4] Angiogenesis is essential to support endometrial growth after menstruation and to provide a canada sildenafil vascularized receptive endometrium for implantation. Endometrial growth is regulated by the hormones (estrogen and progesterone) and growth factors such as vascular endothelial growth factor (VEGF). [6] Some of these factors are produced locally and act via paracrine mechanisms; others have to be transferred to the endometrium. Sufficient uterine blood supply is required for these factors to reach the endometrium, especially to its functional layer. [7] Estrogen-induced endometrial proliferation after menstruation is mainly dependent on blood flow to the basal endometrium.

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[8] Estrogen regulates the proliferative phase and estrogen-primed endometrium produces progesterone receptors, which are necessary for the secretory phase endometrial growth regulated by progesterone. Thin endometrium can be due to various reasons, mainly surgical procedures such as cervical dilation and curettage (D and C), radiotherapy, recurrent infections, congenital Müllerian anomalies, and use of clomiphene citrate. [9] The D and C leads to intrauterine adhesions (IUAs), and the Asherman syndrome is a severe degree of IUA. Patients who receive radiotherapy below the diaphragm are more vulnerable. Radiotherapy can lead to disruption of uterine blood vasculature and reduced uterine size. It was initially studied for use in hypertension and angina pectoris.

The Phase I clinical trials conducted in Morriston Hospital in Swansea suggested the drug had little effect on angina, but it could induce marked penile erections. [16] Following this, Pfizer therefore decided to market it for ED, rather than for angina. The drug was patented in 1996; On March 27, 1998, the Food and Drug Administration approved sildenafil citrate for the treatment of ED. Sildenafil citrate (marketed as Viagra) is manufactured by Pfizer Pharmaceuticals, New York, became the first oral drug available for ED.

• 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.

Nitric oxide causes smooth muscle relaxation by generating intracellular cyclic guanosine monophosphate (cGMP) by stimulating the enzyme guanylate cyclase. cGMP promotes dephosphorylation of myosin light chain kinase, thereby interfering with myosin interaction with actin, leading to smooth muscle relaxation and increase in blood flow. [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].

Pharmacology of Sildenafil

Successful pregnancy requires adequate growth of the endometrium to support the ovum implantation during menstrual cycle. Endometrial thickness (EM) is one of the strongest predictors of implantation. The pregnancy rates are higher when the endometrium thickness is >9 mm[1] and endometrial lining <7 mm had low pregnancy rates because of poor support for implantation. The endometrium is the special epithelial lining of the uterine cavity above the level of internal os. It has two layers: A superficial functional layer and a deeper basal layer.

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The endometrial growth is reliant on the uterine blood flow and angiogenesis. [2] Uterine blood flow is closely related with the vascular development of endometrium. Basal one-third layer is supplied by small, straight, and short arteries and superficial two-third of endometrium is supplied by coiled arteries, branch of uterine artery. [3] The average EM is about 8-10 mm in the secretory phase. Angiogenesis plays a significant role in the development of a dominant follicle, formation of a corpus luteum, and growth of endometrium. [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.

Proper Use

But because for the first time in a while I’m hearing something.. Reply to Aging women, sex and hormonesHeard it again over the weekend. This negative messaging from other women reinforcing this idea that my wife has subscribed to, just giving up at perimenopause,...05-18-2026, 10:16 AM By Acesup This negative messaging from other women reinforcing this idea that my wife has subscribed to, just giving up at perimenopause,.. Reply to Aging women, sex and hormonesThanks for the update Kitty. Really happy you are OK and that you are able to sildenafil pick up continue on the hormones.

Other Medical Problems

I know that of...05-08-2026, 12:07 PM By Acesup Really happy you are OK and that you are able to continue on the hormones. Reply to Aging women, sex and hormonesHad my follow-up and was all good news. Will continue with the doses and timing as we were for now, nothing of any concern on the ultrasound....05-06-2026, 10:03 PM By atskitty2 Had my follow-up and was all good news. Will continue with the doses and timing as we were for now, nothing of any concern on the ultrasound. This sounds like a stupid question from a guy like me. Adverse effects of sildenafil are mainly related to the vasodilation caused by PDE-5 enzyme inhibition. [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.

• 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.

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.

• Sildenafil citrate tablets are typically taken 30-60 minutes before intimacy.
• Monitoring by a healthcare professional is recommended for women.
• Use sildenafil cautiously if you have a history of stroke or heart attack.
• Combining sildenafil with other ED medications is dangerous.
• Pregnancy and breastfeeding considerations should be discussed with a doctor.
• Sildenafil does not induce arousal but enhances physiological responses.
• Not suitable for women with or at risk of abnormal heart rhythms.
• Potential for psychological as well as physical benefits exists.
• Ensure trusted pharmacy sources when purchasing sildenafil for women.
• Sildenafil is available in various dosages, such as 25 mg, 50 mg, 100 mg.
• Discontinue use if adverse effects like chest pain occur.
• A comprehensive sexual health evaluation can determine if sildenafil is appropriate.

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].