# Bromocriptine

Category: Drugs & Compounds

Also known as: Parlodel

Bromocriptine is an ergot-derived drug that functions primarily as a dopamine agonist and serotonin antagonist, shifting the ratio of brain chemicals toward DOPA dominance and away from serotonin. Peat identified its core therapeutic action as the suppression of prolactin, a…

11 passages · 3 authors · 1993–2022 · Most-cited: [Ray Peat](https://bioenergeticoracle.com/md/voices/ray-peat/index.md)

Canonical page: https://bioenergeticoracle.com/concepts/bromocriptine

## Synthesis

**Bromocriptine** is an ergot-derived drug that functions primarily as a **dopamine agonist** and **serotonin antagonist**, shifting the ratio of brain chemicals toward DOPA dominance and away from serotonin. [Source 2, 7] Peat identified its core therapeutic action as the suppression of **prolactin**, a hormone he associated with estrogen excess, water retention, tumor growth, and inhibited progesterone production. [Source 3, 7] He noted that the drug became widely used to treat a massive iatrogenic epidemic of prolactin-secreting pituitary tumors caused by the introduction of oral contraceptives, replacing surgery as the standard of care. [Source 3] Beyond pituitary tumors, Peat observed that bromocriptine’s anti-prolactin and anti-serotonin effects made it relevant for a range of conditions including Cushing's disease, diabetes, and the correction of obesity through improved glucose metabolism. [Source 2, 11]

The drug’s metabolic effects are extensive. Dinkov has highlighted that bromocriptine received FDA approval in 2009 to treat type 2 diabetes, largely due to a potent *triglyceride- and cholesterol-lowering effect*. [Source 4] Peat explained that serotonin interferes with cellular sugar utilization and insulin secretion, so bromocriptine’s anti-serotonin action directly corrects this impairment. [Source 11] He also noted that cocoa naturally contains both bromocriptine and caffeine, though he observed that bromocriptine seems to be *more stimulating to the heart than to the brain*. [Source 8] Dinkov further linked the drug’s pro-dopamine, anti-prolactin profile to the restoration of sexual function, citing early observations in elderly Parkinson’s patients who regained libido during treatment. [Source 10]

Clinically, Peat advised caution with bromocriptine due to the potential for intense reactions, including flushing and low blood pressure, and recommended starting with very low doses. [Source 1] He generally prioritized foundational metabolic support—thyroid, sugar, and nutritional cofactors—over pharmaceutical intervention. [Source 1, 5] When a correspondent reported that a small dose of 0.6 mg resolved severe winter insomnia, Peat acknowledged the result but suggested that the underlying issue involved all hormones regulating energy production, and that bright light, niacinamide, B vitamins, gelatin, sugar, and salt could help maintain energy during darkness. [Source 5] He considered bromocriptine one of several anti-serotonin options, alongside lisuride and ondansetron, for cases of dangerously high prolactin, which he believed should ideally range between 9 and 12 ng/mL. [Source 6] Roddy has noted research suggesting that men with pattern baldness may be more resistant to the anti-stress effects of bromocriptine. [Source 9]

Peat situated bromocriptine within a broader biological context where prolactin and serotonin act as central mediators of stress and degeneration. He described how, in migrating salmon, prolactin surges to regulate water balance as the fish move from saltwater to freshwater, a process that parallels the *water retention and tissue deterioration* seen in estrogen poisoning. [Source 3] He argued that prolactin excess establishes a self-stimulating vicious circle by inhibiting progesterone production, and that all the effects of prolactin excess which respond to an increased DOPA/serotonin ratio can be achieved to some extent by **vitamin B6**, **thyroid**, and **progesterone**. [Source 7] The drug’s ability to suppress prolactin and block serotonin’s metabolic interference made it, in Peat’s view, a corrective agent for a physiology derailed by estrogen, stress, and darkness. [Source 7, 11]

## People also ask

### How does bromocriptine lower prolactin and why does that matter?

Peat explained that bromocriptine acts as a dopamine agonist and serotonin antagonist, which directly suppresses prolactin secretion. He considered this crucial because excess prolactin was linked to estrogen dominance, water retention, tumor growth, and inhibited progesterone production.

### What metabolic benefits does bromocriptine offer beyond treating tumors?

The corpus notes that bromocriptine’s anti-serotonin action improves cellular sugar utilization and insulin secretion, leading to its FDA approval for type 2 diabetes. Dinkov highlighted a potent triglyceride- and cholesterol-lowering effect, and Peat observed it could correct obesity through improved glucose metabolism.

### Why did Peat recommend caution with bromocriptine despite its benefits?

Peat advised starting with very low doses because the drug can cause intense reactions like flushing and low blood pressure. He generally prioritized foundational metabolic support with thyroid, sugar, and nutritional cofactors over pharmaceutical intervention.

## Related concepts

- [Sleep](https://bioenergeticoracle.com/md/concepts/sleep/index.md)
- [ATP (Adenosine Triphosphate)](https://bioenergeticoracle.com/md/concepts/atp-adenosine-triphosphate/index.md)
- [Caffeine](https://bioenergeticoracle.com/md/concepts/caffeine/index.md)
- [Chronic Fatigue Syndrome](https://bioenergeticoracle.com/md/concepts/chronic-fatigue-syndrome/index.md)
- [Hypertension](https://bioenergeticoracle.com/md/concepts/hypertension/index.md)
- [Lipolysis](https://bioenergeticoracle.com/md/concepts/lipolysis/index.md)

## Cited passages

Passage numbers match the `[Source N]` markers in the synthesis above.

### Source 1 — Ray Peat Email Advice Depository — Post 886

Ray Peat · Email · Dec 6, 2022

> [2011]
>
> **Question:** Hi Ray, Despite taking thyroid, and eating well, I still get winter insomnia. I can't fall asleep until dawn, and then sleep during the day. I talked to someone who fixed his similar insomnia issues with 1.25 mg of Bromocriptine a day. From what I read, it sounds to me like Bromocriptine has a lot of negative side effects, and I couldn't find any information on it curing insomnia. Aside from my insomnia, I still often have diarrhea, and fatigue, which make me think that my problems are related to serotonin. Do you think it might be worth trying bromocriptine?
>
> **Ray Peat:** I have never tried it myself, but I know that some people have found it to be more effective than just thyroid. Some people have very intense reactions to it, flushing and low blood pressure for example, so it's good to be very cautious with it. I think it's best to work on thyroid and sugar metabolism, watching the temperature cycle and heart rate. What kind of thyroid product have you used?
>
> **Question:** When I started taking thyroid last year, I felt good taking a 1/4 Cynoplus and 12mcg Cynomel. With thyroid, I quickly gained 50 lbs, and am no longer underweight. I felt more energetic, confident, and had a positive outlook, and most of my eczema disappeared. I don't know what happened, but something changed, and now I can't take any Cynoplus at all without getting weird sensations in the back of my neck, and some fingers--it feels like motor tics, or involuntary movements. So now I'm taking 50mcg of Cynomel, broken up into 4mcg doses.

### Source 2 — EastWest Healing: Questions and Answers I

Ray Peat · Interview · Jul 12, 2011 · http://l-i-g-h-t.com/files/east-west-questions-and-answers-I.mp4

> **Ray Peat:** Any excess of it produces nausea, diarrhea, high blood pressure, tumor growth, fibrosis, arthritis, dementia and so on. So the scope for new research using these drugs is extremely broad. Just recently both a Bromo-LSD and psilocybin studies came out showing treatment of either cluster headaches or other organic type diseases, so it looks like research might be starting up again. One of the early LSD-like drugs was called Lisuride which is, it's called the non-hallucinogenic equivalent of LSD but it's a just less, in ordinary doses it's not hallucinogenic. So it's just a weaker form of LSD and it's been used against diabetes and cancer and all of the serious degenerative diseases and bromocriptine is another ergo-derived drug that cures pituitary tumors and there is a family used to Cushing's disease and other pituitary-related problems.

### Source 3 — One Radio Network: Ray Peat with Patrick Timpone — July 18, 2022

Ray Peat · Interview · Jul 18, 2022

> Pushin' this button? Broadcasting from the beautiful Hill Country in Texas, this is OneRadioNetwork.com. Well, well, very pleasant good morning to you. Welcome to part two of our little show today on the third Monday of the month. We have the pleasure of following Dr. Massey, is having Dr. Ray Pied on. He's a kind of a legend in nutrition, PhD, biology, University of Oregon, specializing in physiology. He taught schools all around. He was in Mexico for a long time. He started his work with progesterone and related hormones in 1968. Wow, that's the year I started radio, 1968. Dr. Ray Pied was doing hormones and I was playing Frank Sinatra records. 1978, Dr. Pied, you and I have been around a little bit. Good morning. Yeah. Nice to have you here. How are you? Just about the time I finished my dissertation related to estrogen metabolism, the news was that there was a tremendous pituitary tumor after the development of tumors with excess production of prolactin. Yeah. You heard us talking about prolactin. Yeah. And for several years, surgery was the only thing. I think it was a 300-fold increase in prolactin surgeries in just a few years. And it turned out to be the onset of the birth control pill was causing this terrible epidemic of surgeries for the pituitary. And after several years, probably a little over 10 years before, doctors really would consider using a drug such as bromocriptine to change the hormones away from the estrogen prolactin effect. And so it became a more manageable problem when they realized a fairly safe drug could do it. But that was sort of all there was to it. It was swept under the rug that had been a purely iatrogenic problem because of the massive use of esters and treatments for menopause and birth control. But then, yeah. The background of the problem started being discussed. People working in the salmon industry realized that the natural physiology of salmon and other migrating fish involved some radical changes from prolactin and the shifts from high salt intake in the ocean to a very low salt intake, high water intake, turned on the prolactin, which is a water regulator.

### Source 4 — #46: Solutions For The Great Reset? | Is Vitamin D3 Toxic? | Optimizing Digestion | Testosterone

Georgi Dinkov · Interview · Jan 16, 2021 · https://open.spotify.com/episode/2xUqPuX25gG6hIUgSF9yal

> **Georgi Dinkov:** About, you know, a coffee, a cup of coffee three times a day has been shown to have a triglyceride lowering effect. But anything more than 200 milligrams per setting, actually per dosage, or anything more than 800 milligrams daily tends to have a pro-stress effect for a person whose metabolism is not optimal. that's it and other things that I've noticed that lower that are known to lower triglycerides and since you also mentioned hyperlactin bromocriptine is actually approved by the FDA to treat type 2 diabetes I repeat treat and you've never seen it on TV, you've never seen it advertised. If you talk to a doctor, he'll probably laugh at you or she will laugh at you out of the room, but if you go to the Wikipedia page for bromocriptine, you will see that it was approved by FDA in 2009 to treat type 2 diabetes because they noticed a potent... triglycerides, and cholesterol, and in general, lipid-lowering effect. And that's the main reason why bromocriptine was approved. And since it's also a hyperlactin, I think you'll play it nicely because it will lower both of these biomarkers. If the doctor is willing to prescribe it. I mean, sometimes you get doctors who argue with you until they're blue in the face, even if you're asking for a drug that's already approved for that purpose. if you find a nice, agreeable doctor, it shouldn't be a problem, especially if you can prove that prolactin is high. Now, I think he was mentioning the units in nanomoles, which are different.

### Source 5 — Ray Peat Email Advice Depository — Post 886

Ray Peat · Email · Dec 6, 2022

> **Ray Peat:** Is there enough sugar in your diet? Do you occasionally have seafood or liver, as a source of selenium?
>
> **Question:** [Any other ideas to help with the insomnia at night?]
>
> **Ray Peat:** Something sugary (milk and honey, for example) right at bedtime might help with sleep.
>
> **Question:** I wrote to you before about taking bromocriptine for insomnia. In just a few days, .6mg of bromocriptine seems to have mostly fixed my severe insomnia. I don't like the feeling it gives me, so I'm not sure if I'll continue to take it. I'm looking for other ways to get the same effect. Do you think bromocriptine helped my sleep because of its antiserotonin properties, or because it lowers prolactin? I was thinking of trying Stablon instead, to see if it helps with my sleep as well.
>
> **Ray Peat:** That's very interesting; I don't know what Stablon's effect might be, but a couple of people tell me they have had very good results from it. I think winter-night stress involves all the hormones that regulate energy production, and getting lots of bright light on your face, head, and neck might help. A little niacinamide (100 mg), vitamins B1 and B6 (about 10 mg), and gelatin, sugar, and salt would help to maintain energy production during the dark.

### Source 6 — Ray Peat Email Advice Depository — Post 20

Ray Peat · Email · Jan 24, 2013

> **Question:** [Antiserotonin Drugs (Lisuride, Ondansetron, Bromocriptine) for High Prolactin]
>
> **Ray Peat:** What would your doctors think about letting you try an antiserotonin drug, like lisuride or ondansetron or bromocriptine, now that your prolactin was measured so high? I think the prolactin should be around 9 to 12.

### Source 7 — Nutrition for Women

Ray Peat · Book · 1993

> Another alkaloid derived from ergot, bromocriptine, is now being used to suppress lactation (such as is caused by prolactin-secreting pituitary tumor which develops after using oral contraceptives) and is used experimentally to treat Parkinson's disease. Both LSD and bromocriptine shift the ratio of two brain chemicals, DOPA and serotonin, towards DOPA dominance. Among the effects of this is an inhibition of prolactin secretion. Prolactin excess is involved in breast cancer and in other cell proliferation, probably including the rapid cell division in psoriasis. Prolactin apparently inhibits progesterone production, and so could establish a self-stimulating vicious circle. All of the effects of prolactin excess (including amenorrhea) which respond to an increase of the DOPA/serotonin ratio can be obtained to some extent by other, more easily available, materials. Vitamin B6, thyroid, and progesterone all have this action. Nickel has been found to have this effect in animals, but isn't available as a nutritional supplement. Thyroid and progesterone have relieved asthma, migraine and psoriasis (or eczema) very effectively. Since tryptophan, an amino acid which is being promoted as a sedative, causes an increase of serotonin in the brain, it should not be used as a supplement by people with any of these "low DOPA" symptoms. Milk is a rich natural source of tryptophan. Since tryptophan promotes formation of serotonin which stimulates release of prolactin, and prolactin activates the formation of sebum (oil) by the skin, large amounts of milk could promote a tendency toward acne, when there is a deficiency of B6, thyroid, progesterone, etc. Although the prolactin-secreting pituitary tumor was very rare a few years ago, it is now the most common form of pituitary tumor. In the 1930's Korenchevsky demonstrated that estrogen produced that kind of tumor, among many others, and that the tumor would regress under the influence of progesterone. Since the liver requires adequate protein to eliminate estrogen, a low protein diet or other deficiencies would undoubtedly contribute to the development of this tumor in a user of birth control pills.

### Source 8 — Caffeine

Ray Peat · Email · 2015

> **Question:** [Caffeine, Magnesium, and Why Coffee and Cocoa Pair Well with Sugar]
>
> **Ray Peat:** Caffeine increases your metabolic rate, so it's important to take it with food, including enough sugar. Coffee and cocoa are very good magnesium sources. Cocoa contains both bromocriptine and caffeine, bromocriptine seems to be more stimulating to the heart than to the brain.

### Source 9 — Telegram - Danny Roddy - 2022-11-03

Danny Roddy · Telegram Message · Nov 3, 2022 · https://t.me/dannyroddy

> # Telegram - Danny Roddy - 2022-11-03
>
> **Danny Roddy** - 12:00
> Stay vigilant.
>
> Hope for the best, but prepare for the worst.  
>
> These people are still in power and will do shit like this again.
>
> **Danny Roddy** - 19:37
> I don't have access to the full-text, but this article suggests that men with pattern baldness are more resistant to the anti-stress effects of bromocriptine than non-balding men.
> **Danny Roddy** - 20:56
> People have posited that situations like this will have a harmony-promoting effect by disabling the internet, but I can't see that happening with most of the sick and traumatized public -- especially in densely populated areas.

### Source 10 — The Thermo Diet Podcast Episode 74 - Sex Talk With Georgi Dinkov

Georgi Dinkov · Interview · Mar 28, 2021 · https://www.youtube.com/watch?v=w459gqsBeGs

> **Georgi Dinkov:** It should be known for a while, but through an indirect finding. There's a drug called bromocriptine, which is used to treat Parkinson's disease. And it's basically a dopamine agonist. and has some partial serotonin antagonism slash agonism. But in general, the overall effects of the drug when used at the clinically prescribed doses is actually heavily pro-dopamine and anti-serotonin. In fact, there are several studies demonstrating you can treat Cushing disease, which is excessive production of cortisol, by administering bromocriptine, which demonstrates that excessive cortisol production is under the control of the brain, of the central mechanism. They had noticed that when they were treating elderly people with Parkinson's disease, because it used to be, not anymore, now younger people are starting to get Parkinson's as well. But back in the 70s and 80s, Parkinson's disease was an old person's disease, specifically old male person disease, more often than not, in a ratio of about four to one, even five to one. So most of the hospitalized people with Parkinson's disease were elderly males. And when they were giving them bromocriptine, they noticed that they started to pay an exorbitant amount of attention to the female nursing staff. And they basically started to investigate more what are the mechanisms behind that effect.

### Source 11 — Townsend Letter — November 2001

Ray Peat · Newsletter · Nov 1, 2001

> (People who are studying chronic inflammatory processes are gathering data that will be meaningful for understanding depression and aging, but it seems that psychiatrists don’t know about their work.)
>
> Anti-serotonin drugs such as bromocriptine have been found to correct diabetes, apparently because serotonin interferes with the use of sugar, acting on cells’ metabolism to decrease its use, and preventing the secretion of insulin. Bromocriptine’s correction of obesity also seems to be the result of its correction of glucose metabolism. In the 1970s, it was established that darkness increases the appetite for alcohol. More recently (Lin and Hubbard, 1995) it has been found that the antiserotonin drugs prevent the dark-induced appetite for alcohol. Alcohol is probably a self-medication to alleviate serotonin-related depression. Alcohol, like progesterone, is neuroprotective in brain trauma. Alcohol increases formation of the sedative neurosteroid (“THP”) derived from progesterone (VanDoren, et al., 2000), and alcohol increases brain circulation, countering serotonin’s effect.
>
> Progesterone withdrawal and alcohol withdrawal are so closely related that one can alleviate the symptoms of the other. Isolation might be another factor contributing to depression and alcoholism, since it decreases the formation of the protective neurosteroid.
>
> The “brain fog” that is often described in depressed people (and people with other serotonin syndromes, such as the fibromyalgia syndrome) is probably produced by a combination of factors, including hypothyroidism, low body temperature, and hyperserotonemia. The amnesia produced by shock was found to be prevented by antiserotonin drugs (Montanaro, et al., 1979). The same researchers suggested that the drugs had an “antipunishment” effect, in effect making the animals less fearful.
>
> There is more confusion in the medical literature regarding the actions of serotonin than there is about practically any other subject. For example, there is clear evidence from both animal and human studies that serotonin, like estrogen, is associated with aggression, but the dominating stereotype is that serotonin is the agent of serenity and peace. In an epidemiological study (Moffitt, et al., 1998), a record of violence was clearly associated with above-average blood serotonin levels.

_Generated 2026-07-20 from the Bioenergetic Oracle corpus._