Management of GSM
First-line therapy of GSM involves over-the-counter lubricants and moisturizers, which are often adequate to alleviate or eliminate women’s symptoms. However, the panel that developed the statement found no evidence that hyaluronic acid was any more effective than other lubricants or moisturizers, and no herbal products were found to effectively treat GSM.
While emerging evidence suggests that energy-based therapies, such as treatments with vaginal laser or radiofrequency devices, show some promise, more evidence is needed to show safety and efficacy before the panel can recommend routine use.
When over-the-counter therapies are not effective, vaginal estrogen usually relieves GSM with little absorption and is preferred over systemic therapy if GSM is the only bothersome menopausal symptom. Options include topical creams, a slow-release estradiol intravaginal ring, and estradiol vaginal tablets and inserts.
“However, when systemic hormone therapy is needed to treat other menopause symptoms, usually a woman will derive benefit and resolution of the GSM at the same time,” Dr. Faubion said. “However, for some women, additional low-dose vaginal estrogen may be added to systemic estrogen if needed, and that could include vaginal DHEA.”
All the approved vaginal products have shown efficacy, compared with placebo in clinical trials, and a Cochrane review comparing the different therapies found them to be similarly efficacious in treating vaginal dryness and dyspareunia with no significant differences in adverse events.
Preparing patients for the boxed warning
As vaginal estrogen doses are significantly lower than systemic estrogen, their safety profile is better, with serum estrogen levels remaining within the postmenopausal range when low-dose vaginal estrogen therapy is used. That said, some studies have shown that vaginal estrogen cream can be a large enough dose to involve systemic absorption and lead to symptoms such as vaginal bleeding, breast pain, and nausea.
However, package inserts for vaginal estrogen have the same boxed warning as seen in systemic hormone therapy inserts regarding risk of endometrial cancer, breast cancer, cardiovascular disorders, and “probable dementia” despite these conditions not being linked to vaginal estrogen in trials. Neither has venous thromboembolism been linked to vaginal estrogen.
“The panel felt it was very important that women be educated about the differences between low-dose vaginal estrogen and systemic estrogen therapy and be prepared for this boxed warning,” Dr. Faubion told attendees. “It’s really important to say: ‘You’re going to get this, it’s going to look scary, and there’s no evidence these same warnings apply to the low-dose vaginal estrogen products.’ ”
This point particularly resonated with NAMS attendee Juliana (Jewel) Kling, MD, MPH, an associate professor of medicine at the Mayo Clinic Arizona, Scottsdale.
“The point about educating women about the differences between low-dose vaginal estrogen products and systemic treatments and being prepared for the boxed warning is important and I hope reaches many practitioners,” Dr. Kling said in an interview.
The panel did not recommend using progestogen with low-dose vaginal estrogen therapy or doing routine endometrial surveillance in women using vaginal estrogen. But endometrial surveillance may be worth considering in women with increased risk of endometrial cancer.
Estrogen insufficiency from premature menopause or primary ovarian insufficiency is linked to more severe sexual dysfunction, which can be particularly upsetting for younger women with vaginal atrophy and dyspareunia. A meta-analysis showed that vaginal estrogen appeared to slightly outperform over-the-counter lubricants in bringing back sexual function.
Undiagnosed vaginal or uterine bleeding is a contraindication for vaginal estrogen until the cause has been determined, and providers should use caution in prescribing vaginal estrogen to women with estrogen-dependent neoplasia. Dr. Faubion noted that GSM is common in women with breast cancer, especially if they are receiving endocrine treatments or aromatase inhibitors.
“For women with a hormone-dependent cancer, GSM management depends on each woman’s preference in consultants with her oncologist,” she said. GSM management in women with a nonhormone-dependent cancer, however, is no different than in women without cancer.
DHEA is a steroid that effectively improves vaginal maturation index, vaginal pH, dyspareunia, and vaginal dryness. The most common side effect is vaginal discharge.
Ospemifene, an estrogen agonist available in the United States but not in Canada, is the only oral product approved to treat vaginal dryness and dyspareunia. An observational study also found it effective in reducing recurrent UTIs. The most common side effect is vasomotor symptoms, and it should not be used in patients with breast cancer because it hasn’t been studied in this population.
“This updated information and position statement was needed and will be very clinically relevant in treating midlife women,” Dr. Kling said in an interview. “Dr. Faubion presented a high-level overview of the position statement with clinically relevant points, including treatment for sexual dysfunction related to GSM, GSM treatment in cancer patients, and emphasized the efficacy and low-risk safety profile of low-dose vaginal estrogen, compared to systemic [hormone therapy], for treatment of GSM.”
Dr. Faubion and Dr. Kling disclosed no relevant financial relationships.
A version of this article originally appeared on Medscape.com.