Megatron28
Moderator
A lot of guys come to the TRT forum complaining of poor libido, ED, infrequent or non-existant "morning wood." A lot of them suspect it is due to low testosterone levels and their search brings them to 'Ology. I have been doing some reading and it looks like imbalances of prolactin and dopamine may be a possible culprit. Dopamine is the hormone responsible for sexual arousal. After a male has an orgasm, high levels of prolactin are released which provides him with sexual gratification and puts him in what is known as the Refractory Period. This is the time where a male has to wait a while before he is capable of having sex again. Prolactin counteracts the effects of dopamine. Similarly, dopamine is known as the Prolactin Inhibitory Hormone. They go hand-in-hand in the body's search for homeostasis. Using Cabergoline to change the balance between dopamine and prolactin may be the answer to solving libido and ED problems. Perhaps even Low T itself.
Cabergoline is a type of Dopamine Agonist. Dopamine receptor agonists are drugs that have a structure very similar to dopamine. Because of this similarity, they are able to mimic the action of dopamine (rather than replenish the inadequate supply of dopamine) in the brain. If one imagines dopamine as being a key (agonist) which only fits a specific lock (receptor) to let a door open (i.e. penile erection), losing the key to the door means that the door cannot be opened. The loss of dopamine therefore means that the receptors will not receive the signal telling the penis to work properly. But because dopamine agonists have a similar structure to dopamine, they are able to fit into the dopamine receptor, resulting in the same signal being sent that occurs with dopamine in the non-diseased state and normal control of the penis is restored.
Here are some things to consider:
- One of the side effects of cabergoline is that it can, in some cases, increase libido in subjects.
- Studies have shown that it can stop erectile dysfunction along with improving copulatory performance.
- Cabergoline is well documented to reduce the refractory period after sex and allow men to have numerous multiple orgasims in rapid succession.
- You may experience "overwhelming" orgasims and stronger ejaculations.
- Cabergoline may also make you a happier person with all that dopamine floating around your brain.
- Elevated prolactin levels can lower testosterone levels.
It may be worth having a conversation with an endocrinologist about prolactin and treatment with cabergoline before hopping on TRT for the rest of your life -- especially if you are a male in your 20's or 30's. Here are some studies out there. But I will caution that the first one is based on men with hyperprolactinemia so it may not be applicable to the general population.
Six Months of Treatment with Cabergoline Restores Sexual Potency in Hyperprolactinemic Males: An Open Longitudinal Study Monitoring Nocturnal Penile Tumescence
International Journal of Impotence Research - Cabergoline treatment in men with psychogenic erectile dysfunction: a randomized, double-blind, placebo-controlled study
I do want to caution you to consider the risks that come with using Cabergoline or any other Dopamine Agonist (DA). Make sure you do your homework before using these medications. Dopamine Agonist Withdrawal Syndrome (DAWS) is real. If you are prone to compulsive obsessiveness, you should really think twice as DA's are known to cause problems with obsessive gambling, hyper-sexuality or other compulsive disorders. They can cause nausea and fatigue. Even hallucinations in some cases. They are best taken before bed with food. Although Cabergoline seems to be tolerated better than other DA's.
A common dosage for Cabergoline would be between .25mg and .50mg every 3.5 days. The half-life is approximately 60-70 hours.
Finally, I am not a doctor so make sure you consult with yours thoroughly before considering any treatments involving Dopamine Agonists including Cabergoline.
Cabergoline is a type of Dopamine Agonist. Dopamine receptor agonists are drugs that have a structure very similar to dopamine. Because of this similarity, they are able to mimic the action of dopamine (rather than replenish the inadequate supply of dopamine) in the brain. If one imagines dopamine as being a key (agonist) which only fits a specific lock (receptor) to let a door open (i.e. penile erection), losing the key to the door means that the door cannot be opened. The loss of dopamine therefore means that the receptors will not receive the signal telling the penis to work properly. But because dopamine agonists have a similar structure to dopamine, they are able to fit into the dopamine receptor, resulting in the same signal being sent that occurs with dopamine in the non-diseased state and normal control of the penis is restored.
Here are some things to consider:
- One of the side effects of cabergoline is that it can, in some cases, increase libido in subjects.
- Studies have shown that it can stop erectile dysfunction along with improving copulatory performance.
- Cabergoline is well documented to reduce the refractory period after sex and allow men to have numerous multiple orgasims in rapid succession.
- You may experience "overwhelming" orgasims and stronger ejaculations.
- Cabergoline may also make you a happier person with all that dopamine floating around your brain.
- Elevated prolactin levels can lower testosterone levels.
It may be worth having a conversation with an endocrinologist about prolactin and treatment with cabergoline before hopping on TRT for the rest of your life -- especially if you are a male in your 20's or 30's. Here are some studies out there. But I will caution that the first one is based on men with hyperprolactinemia so it may not be applicable to the general population.
Six Months of Treatment with Cabergoline Restores Sexual Potency in Hyperprolactinemic Males: An Open Longitudinal Study Monitoring Nocturnal Penile Tumescence
In conclusion, at study entry, 50% of the patients complained of sexual disturbances, 96.7% of whom had an impairment of erectile events per night compared with 13.7% of controls. Six months of treatment with cabergoline normalized testosterone levels in most cases, thus restoring and maintaining during treatment the capability of normal sexual activity in hyperprolactinemic males.
In conclusion, 50% of the patients coming to our observation for hyperprolactinemia complained of sexual disturbances, whereas 96.7% of them had an impairment of erectile events per night compared with 13.7% of controls. Six months of treatment with cabergoline was successful not only in producing a rapid normalization of serum PRL levels but also in restoring and preserving gonadal function in hyperprolactinemic men. The treatment should be considered as a first choice in hyperprolactinemic hypogonadism, providing a normalizing of gonadotropin pulsatile secretion and consequently testosterone levels in most cases, thus restoring and maintaining during treatment the capability of normal sexual activity in male patients.
Besides the clear-cut PRL-inhibitory effect, cabergoline, in analogy with other dopamine agonists (33, 34), could improve erectile function also directly at a central level. This central effect has been better demonstrated by using apomorphine for the treatment of erectile dysfunction (34). The exact involvement of dopamine in the control of sexual motivation and genital arousal in men is still unknown, but experimental data in male rats suggest an implication of dopamine in sexual motivation as well as in copulatory performance (34). The anticipatory/motivational phase of copulatory behavior is regulated by dopamine released at the nucleus accumbens (innervated by the mesolimbic dopaminergic pathway) and the medial hypothalamic preoptic area (innervated by the dopaminergic incertohypothalamic pathway), but a permissive role of dopamine released at the median hypothalamic preoptic area has also been documented (34).
International Journal of Impotence Research - Cabergoline treatment in men with psychogenic erectile dysfunction: a randomized, double-blind, placebo-controlled study
The effectiveness of cabergoline in 50 men with psychogenic erectile dysfunction was investigated in a 4-month, randomized, placebo-controlled, double-blind study with validated psychological tests, and prolactin, follicle-stimulating hormone, luteinizing hormone and testosterone serum levels. Cabergoline treatment was well-tolerated and resulted in normalization of hormone levels in most cases. In the cabergoline-treated group, significant interactions between prolactin and testosterone serum concentrations were observed. Erectile function improved significantly. Sexual desire, orgasmic function, and the patient's and his partner's sexual satisfaction were also enhanced. Cabergoline may be an effective and safe alternative agent for men with psychogenic ED.
I do want to caution you to consider the risks that come with using Cabergoline or any other Dopamine Agonist (DA). Make sure you do your homework before using these medications. Dopamine Agonist Withdrawal Syndrome (DAWS) is real. If you are prone to compulsive obsessiveness, you should really think twice as DA's are known to cause problems with obsessive gambling, hyper-sexuality or other compulsive disorders. They can cause nausea and fatigue. Even hallucinations in some cases. They are best taken before bed with food. Although Cabergoline seems to be tolerated better than other DA's.
A common dosage for Cabergoline would be between .25mg and .50mg every 3.5 days. The half-life is approximately 60-70 hours.
Finally, I am not a doctor so make sure you consult with yours thoroughly before considering any treatments involving Dopamine Agonists including Cabergoline.