Palatin begins bremelanotide phase 3 study for treatment of female sexual dysfunction

Palatin Technologies, Inc. (NYSE MKT: PTN), a biopharmaceutical company developing targeted, receptor-specific peptide therapeutics for the treatment of diseases with significant unmet medical needs and commercial potential, today announced that it has started its bremelanotide pivotal registration program. The Company has initiated its phase 3 reconnect study in the United States for the treatment of female sexual dysfunction (FSD).

"We are pleased to achieve this major milestone in the bremelanotide program with the initiation of our phase 3 reconnect study in the U.S," stated Carl Spana, Ph.D., President and CEO of Palatin. "This is a key step in our global strategy to bring bremelanotide to market for the millions of women who have FSD and are seeking a safe and effective treatment." Dr. Spana further stated that, "Our recent $30 million financing has provided the financial resources to start the bremelanotide phase 3 pivotal registration program and timing flexibility regarding partnering for the U.S. and other non-European territories."

Palatin begins bremelanotide phase 3 study for treatment of female sexual dysfunction

AMAG Pharmaceuticals Announces FDA Approval of Vyleesi (bremelanotide injection) for Hypoactive Sexual Desire Disorder (HSDD) in Premenopausal Women

In continuation of my update on  bremelanotide

MAG Pharmaceuticals, Inc.    announced  that the U.S. Food and Drug Administration (FDA) has approved Vyleesi (bremelanotide injection), a melanocortin receptor agonist, to treat acquired, generalized hypoactive sexual desire disorder (HSDD) in premenopausal women. The Vyleesi autoinjector is the first treatment for this patient population that can be self-administered as needed in anticipation of sexual activity.

HSDD is characterized by low sexual desire that causes distress or interpersonal difficulty and is not due to a co-existing medical or psychiatric condition, problems within the relationship, or the effects of a medication or other drug substance.

“HSDD has been recognized as a medical condition since the 1970s, yet it has been widely underdiagnosed and undertreated,” said Anita H. Clayton, M.D., Chair, Department of Psychiatry & Neurobehavioral Sciences, University of Virginia School of Medicine, VA. “Women with HSDD often avoid situations that could lead to intimacy, the impact of which goes far beyond the bedroom and can often result in anxiety, loss of vitality, self-esteem issues and relationship stress. It is important that women suffering with this condition have a choice of treatment options available to them.”

HSDD is thought to have a neurobiologic basis which is supported by brain imaging studies. When study participants were shown visual sexual stimuli, there was a difference in the brain activation patterns between women with HSDD compared to those women without HSDD[i].

“Today’s approval underscores AMAG’s commitment to women’s health and dedication to raising awareness and improving education about HSDD,” said Julie Krop, M.D., chief medical officer at AMAG. “While HSDD is the most common female sexual dysfunction condition, it is largely under-recognized. I want to thank the thousands of women who participated in the clinical trials to support the approval of Vyleesi. Their participation in the trials helped to pave the way for a novel treatment option that offers hope to the nearly six million premenopausal women who have suffered in silence from HSDD—empowering them to reclaim their sexual desire.”

The FDA approval of Vyleesi is based upon data from approximately 1,200 women in two pivotal, double-blind placebo controlled Phase 3 trials (RECONNECT). In both clinical trials, Vyleesi met the pre-specified co-primary efficacy endpoints of improvement in desire and reductions in distress as measured by validated patient-reported outcome instruments. Upon completion of the trial, women had the option to continue in a voluntary open-label safety extension study for an additional 12 months. Nearly 80 percent of patients who completed the Phase 3 trials elected to remain in the open-label portion of the study, where all of these patients received Vyleesi.

In the pivotal trials, the most common adverse events were nausea, flushing, injection site reactions, and headache. The majority of events were reported to be transient and mild-to-moderate in intensity. In clinical trials, Vyleesi caused small, transient increases in blood pressure, and is contraindicated in women with uncontrolled high blood pressure or known cardiovascular risk.

AMAG is committed to working with payers and healthcare professionals to help ensure women with HSDD have access to Vyleesi. The product will be commercially available in September through select specialty pharmacies. To raise healthcare provider awareness of Vyleesi, AMAG will leverage its existing women’s and maternal health sales force of approximately 125 sales representatives calling on U.S. obstetrics, gynecologists and sexual medicine specialists, and will also offer patients the ability to connect with a physician through a telemedicine option. Patients and providers can learn more about HSDD and Vyleesi at www.vyleesi.com and sign up to receive information about how to obtain Vyleesi as soon as it is available.

AMAG in-licensed Vyleesi from Palatin Technologies, Inc. in February 2017. Under the terms of the agreement, the approval of Vyleesi by the FDA triggers a $60 million payment obligation to Palatin. In addition, AMAG will pay Palatin tiered royalties on annual net sales of Vyleesi ranging from the high-single digits to the low double-digits. AMAG will also pay Palatin sales milestones based on escalating annual net sales thresholds, the first of which is $25 million, triggered at annual net sales of $250 million.

https://en.wikipedia.org/wiki/Bremelanotide

FDA Approves Second Drug, Vyleesi, to Help Women With Low Libido

In continuation of my update on bremelanotide

The U.S. Food and Drug Administration on Friday gave its approval to Vyleesi, the second medication so far approved to help women with low sexual desire.

In a news release, the FDA said that Vyleesi (bremelanotide) is a drug that would be administered by injection prior to having sex.

It's been specifically approved for premenopausal women with a condition known as acquired, generalized hypoactive sexual desire disorder (HSDD).

"There are women who, for no known reason, have reduced sexual desire that causes marked distress, and who can benefit from safe and effective pharmacologic treatment," said Dr. Hylton Joffe, who directs the FDA's Center for Drug Evaluation and Research's Division of Bone, Reproductive and Urologic Products.

"Today's approval provides women with another treatment option for this condition," Hylton said in the news release.

According to the agency, HSDD is not caused by any medical or psychiatric condition, relationship issues or drug side effects.

Instead, women with HSDD have "previously experienced no problems with sexual desire," the FDA said. "Generalized HSDD refers to HSDD that occurs regardless of the type of sexual activity, situation or partner."

The exact way in which Vyleesi helps stimulate sexual desire remains unclear, but it works on melanocortin receptors on cells, the FDA said.

The drug is injected under the skin of the abdomen or thigh at least 45 minutes prior to a sexual encounter, although the best timeframe for dosing could vary from user to user.

Side effects can occur, the FDA added, and include nausea and vomiting, flushing, injection site reactions and headache. Nausea was especially common, affecting 40% of users in the clinical study that led to approval.

That study involved 1,247 premenopausal women with HSDD who received Vyleesi or a placebo in one of two 24-week trials.

"In these trials, about 25% of patients treated with Vyleesi had an increase of 1.2 or more in their sexual desire score (scored on a range of 1.2 to 6.0, with higher scores indicating greater sexual desire) compared to about 17% of those who took placebo," the FDA noted.

Still, the overall benefit was not large. "There was no difference between treatment groups in the change from the start of the study to end of the study in the number of satisfying sexual events. Vyleesi does not enhance sexual performance," the FDA said.

And there was one other caveat: Vyleesi can hike blood pressure, so people with heart disease or high blood pressure should not take it, the FDA said.

Vyleesi should also not be taken by anyone who is also taking the drug naltrexone, used to combat opioid dependency, because Vyleesi reduces naltrexone's effectiveness.

Vyleesi is not the first drug approved to enhance flagging libido in women. In 2015 the FDA approved Addyi (flibanserin) for the purpose, but the drug did not become widely used because it cannot be taken with alcohol and only certain certified health care providers are allowed to prescribe it.

According to CNN, Vyleesi's maker, AMAG Pharmaceuticals, said the new drug will not be available until September, and pricing and reimbursement have yet to be determined.

One expert in female sexual health said it remains to be seen how widely Vyleesi will be used.

"Female sexual dysfunction is more complicated in some ways than male sexual dysfunction, so it's more difficult to treat," Dr. Nicole Cirino, co-director of the Menopause and Sexual Therapy Clinic at Oregon Health and Science University's Center for Women's Health, told CNN. She had no role in Vyleesi's development.

Cirini suspects Vyleesi probably will not be the first option women with HSDD turn to, but it might prove a useful adjunct to standard psychotherapy and Addyi.

Vyleesi, like Addyi, probably won't be overprescribed, Cirino added. When Addyi was introduced, there were concerns "that doctors would just be prescribing this medication to anybody that came in saying that they were having an issue with their libido," she said. "And I think we have to give physicians more credit than that. In fact, that didn't happen at all."

Still, Vyleesi could help some women, Cirino said

https://en.wikipedia.org/wiki/Bremelanotide