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Cerebrolysin and LSD very powerful synergy, wondering if research exists on this combination.

quinfreaky

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Apr 24, 2026
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So I've been taking Cerebrolysin for the last 5 days and will do another 14 doses this cycle. The cycle is semi-restorative, I don't have any major TBI, But I've done martial arts since I was 5 (currently 34) and I can bet that there's been a bit of brain damage through all the fights and sparring.

Now that my reasons have been clarified, I'll get into the subject matter. I've used psychedelic substances fairly regularly and at very high doses throughout my life (I have big breaks such as a year or two). Two days prior to the cerebrolysin cycle, I took a 10mcg microdose of LSD, it had barely any effect on me, on the first day of the cerebrolysin cycle I took another 10mcg dose, this time it had a mild but notable effect on me (Should have had a far lesser effect due to tolerance from having a dose two days prior), on the third day I took 30mcg, this is not alot of LSD, but it was comparable to 300mcg in terms of mental effects, without any visuals. This is very odd and very unusual given the tolerance built up, it seems that cerebrolysin potentiates LSD.

It's hard to prove and purely anecdotal, but it's noteworthy and it may be worth researching (clinical research, I'm not suggesting anyone should be a guinea pig for this combination), and at the very least should be noted as a precautionary tale for others who might end up using this combination.





Full trip report:

A few notes to mention regarding mindstate and substance consumption prior to the main experience for context:

I am a very experienced tripper and have had high doses of various psychedelic substances on several occasions and even combinations of such.

Rather than write a giant list of psychedelic substances I've taken I'll just say it's pretty much all of the common ones and many 'research chemicals'.

From that perspective I'm pretty prepared for a 30 mcg dose, that's light work.

4 Days Prior to taking Cerebrolysin and LSD together, I actually took a 10mcg microdose, it had no notable effect on me other than a bit of vasoconstriction. I started a 20 dose Cerebrolysin cycle (10ml per dose), on the first day of that cycle (two days after the first microdose) I took a 10mcg microdose of LSD with the Cerebrolysin, without going into detail it had some effect on me despite the fact that normally one would expect the tolerance to make the experience weaker at the same dose, and despite the fact that 10mcg is barely perceptible.

In summary, I am very experienced with psychedelics and should have developed tolerance due to the length between my LSD doses.



On Day 3 of my Cerebrolysin cycle (two days after the 10mcg LSD dose), I decided to take 30mcg of LSD at 6am, I was slightly tired but ready for such a 'microdose', I took my supplements (nothing that potentiates, just multivitamins) and hopped back in bed. The Cerebrolysin was taken at 11pm the previous night (10ml dose). I woke up at 8am and started to feel mentally trippy and very strong physical effects of the LSD, Much warmer, vasoconstriction, more energy. I was planning to do some creative work but was already feeling like it wasn't going to be a good idea. For perspective this felt like the peak of a 100 ug experience but without the visuals at all.

At 8:05 am I felt very hungry but my stomach didn't feel good and I felt like there was nothing in my house that I could consume, I felt slightly anxious and opted not to go out on the road or deal with people/complex real world problems for a while. I remember putting some water in a bowl and putting this bowl in my freezer (This is something I do daily for cold face plunges).

At about 9:15 am it started getting more intense and I felt a stronger physical flush and a strong feeling of 'a harder wave of the trip hitting me' It felt mentally like 120 ug or a little more than it did at 8am.

I started having very strong thoughts, fast thoughts and deep introspection from 9:30 am onwards, A lot of inner work started happening. I started to look at aspects of my life deeply, my motivations, my reality, my living situation and personal relationships, it wasn't so deep that I was forced to address it (not like ego death just yet), but it was deep enough and impactful enough that it was not really possible to ignore my thoughts either.

From 10:00 am onwards, it started to hit me progressively harder in mini-waves, I'd get more intense thoughts and faster thoughts, I'd get over a wave, have 5-10 minutes of euphoria and then hit another wave/plateau.

At 10:10am I decided to dip my face in the icy water I'd prepared earlier (the water in a bowl I referred to at 8am), I pushed through the pain and anxiety, I decided that I couldn't use the LSD as an excuse not to do it and not to push through. I felt better for a while, much better, slightly clearer headed.

At roughly 11:00 am the trip starting getting very intense, but still absolutely no visuals, but mentally I was unable to get out of bed as the thoughts from earlier and things I'd been hiding from my subconscious were inescapable and far more intense. Physically I could feel the weirdness of the LSD, Nausea, warmer body, feeling all of my breath, noting my heartbeat more intensely and feeling more physically energetic despite being stuck in bed. This was now like the peak of a 200mcg LSD experience with some of the physical effects, most of the mental effects but none of the visual effects whatsoever, it was very odd.

At 11:30 am the trip was getting close to the true peak and now I was truly fighting my own psychology and facing my internal issues, I was pushed to do so, notable LSD like physical sensations (electrical energy bursts, lighter feeling but restricted lightness in legs) and oddness in general.

At 12:00 am all the ideas I had about having a productive day, going out to get food or do anything had gone out the window, I was now at the mercy of my subconscious mind (not fully or to the point of ego-death, but enough that I had to deal with it). I was tripping very hard mentally, like a 200-300mcg trip (hard to quantify and relative/anecdotal), again I'll note that I had absolutely no visuals whatsoever. I was pretty stuck until about 1pm.

At 1pm the trip was still very intense, but fading, I'd come down from the peak slightly, more like the 11:00 am intensity, I got out of bed and drank some milk, this made me feel much better. I had mainly dealt with my mental issues with myself, but was too 'soft' and 'sensitive' to go out and do anything productive, I stayed in bed for another hour.

At 2pm I was mentally back at where I was at 10am, some intensity but now further from the peak, although the energetic legs feeling was still as intense. I managed to get out of bed, I was getting ready to go to the clinic to get my next dose of Cerebrolysin.

At roughly 2:22pm a friend living in the apartment down the hallway called me to inform me he'd forgotten his key for the main gate, so I went down and let him in, I felt a bit 'fried' but functional enough, I decided to drink a lot of water and some milk, I felt a little better after this.

At 2:28pm I went to the clinic, I arrived at 2:35pm.

At 2:38pm I got the nurses to inject me with 10ml's of Cerebrolysin, I stayed there till about 2:45-2:50pm as it took about 2 minutes to administer and I had to lie down for a few minutes so that the nurses are happy that I'm not too nauseous.

I got back home at about 3pm and ordered food, at this point I felt tired and foggy, but I wasn't tripping too hard, I was only feeling minor effects at this point, both mentally and physically.

Food arrived at 3:25pm, I was mostly sober but very tired and a little 'fried', minor head pain, minor head pressure and mental fatigue.

At 4pm till 5pm I got ready for work and did some 'pre-work' preparation for my work, this required some basic logic for me and I was able to do this but a little slowly and in a 'hazy' way.

I was at work from 5:15pm till about 9:20pm, I was tired at work and a little foggy but managed my shift, I'd say the effects were completely gone by about 6:30pm and I only felt the afterglow and fog after that point.




The primary reason I've made this trip report is to talk about the potential of Cerebrolysin to potentiate certain aspects of an LSD trip despite me hypothetically having prior tolerance to the substance, as an experienced tripper, even without tolerance I know that 30mcg shouldn't do much to me, but with tolerance I should barely feel anything. Yet despite that the combination of the LSD and Cerebrolysin massively enhanced certain aspects of the LSD trip and made me have a much much harder trip than 30mcg would normally provide (despite a lack of visuals). I feel that it is my duty to report this potential drug interaction, as it is undocumented territory at this point. I should also note in the interests of harm prevention that nobody knows the effects of this combination of drugs (Cerebrolysin and LSD) and it's potentially very dangerous to mix these substances.

Thank you for reading this, regards, Yusef Quinlan (Psychonaut).
 
Pretty interesting but not too surprising to me, I don't have any personal experience so thought I'd wait a bit before replying but immediately I thought of the racetam nootropics and noopept (which I guess is a more exotic racetam?), all of which are heavily potentiating of many psychedelics, particularly serotonergic ones (at least, IIRC that's mostly what I remember reading about). Cerebrolysin although somewhat different in it's mechanism of action has some overlap, specifically with the BDNF upregulation.

My brain and attention span is currently too destroyed to do the research on this myself so I just asked one of the AIs, I'll copy paste the most relevant parts of the answer with some editing (I asked "Why is it that racetam nootropics including noopept, potential [sic] psychedelic drugs so significantly? I just read that cerebrolysin does also and I assume it's a similar mechanism, something to do with BDNF...?")...

Claude Sonnet 4.6 said:
... BDNF / TrkB Signaling — Your intuition:
This is where noopept and cerebrolysin become particularly interesting, and where a major recent finding is relevant:
  • Noopept upregulates both BDNF and NGF expression, particularly in the hippocampus and cortex.
  • Cerebrolysin is a peptide hydrolysate containing BDNF, NGF, GDNF, and other neurotrophic factors directly — it essentially delivers them exogenously.
  • A landmark 2021 paper by Casarotto et al. in Nature found that psychedelics including LSD, psilocin, and DMT directly bind to TrkB (the primary BDNF receptor) — not just 5-HT2A — and that this TrkB binding may be central to their neuroplastic and antidepressant effects.
So if you're already flooding TrkB receptors with elevated BDNF (from noopept/cerebrolysin), and then take a psychedelic that also acts as a TrkB agonist, you potentially get additive or even synergistic signaling at that receptor.

[...] Neuroplasticity Priming
Both classes of compounds promote neuroplasticity through overlapping pathways (CREB activation, dendritic growth, synaptic remodeling). There's a hypothesis that nootropics that upregulate plasticity markers essentially put the brain in a more "receptive" state — sometimes called opening a "critical period" — which may make the subjective and neurological effects of psychedelics more pronounced.

So yeah, TLDR, BDNF upregulation = increased agonism at TrkB receptors, + a serotonergic psychedelic = even more TrkB agonism, I guess.

I must admit I don't really know anything about the TrkB receptors or what they're for, except in the context that using too much noopept can lead to TrkB downregulation, supposedly (>3 months, ballpark, IIRC)... didn't know that the serotonergic psychedelics agonise this receptor either, pretty interesting and I guess that goes some way to explaining the significant nootropic+psychedelic synergy. Ah hell may as well follow up that last query... ("what exactly is the TrkB receptor for?")...
Claude Sonnet 4.6 said:
[Tropomyosin Receptor Kinase B] is the primary high-affinity receptor for BDNF (Brain-Derived Neurotrophic Factor), and to a lesser extent NT-4/5 (neurotrophin-4/5). It's a receptor tyrosine kinase, meaning when activated, it phosphorylates itself and downstream proteins to trigger cascades of intracellular signaling. [Its core biological roles are:]

Neuronal survival
TrkB signaling is fundamentally a survival signal for neurons. During development, neurons that fail to receive adequate BDNF/TrkB signaling undergo programmed cell death (apoptosis). It essentially tells a neuron "you are connected, you are useful, keep living."

Synaptic plasticity and LTP
This is probably its most studied adult role. TrkB activation is essentially required for long-term potentiation (LTP) — the cellular mechanism underlying learning and memory. When you learn something new, BDNF is released at active synapses, binds TrkB, and helps consolidate that synaptic connection. Block TrkB and you severely impair the ability to form new memories.

Dendritic and axonal growth
TrkB signaling promotes the physical growth and branching of dendrites and axons — the structural basis of forming new connections. It literally shapes the architecture of neural circuits.

Regulation of neurogenesis
In the hippocampus, TrkB signaling supports the survival and integration of newly born neurons (adult neurogenesis), which is closely tied to mood regulation and cognitive flexibility.

Modulating inhibitory/excitatory balance
TrkB also regulates the expression of KCC2, a cotransporter that maintains the chloride gradient necessary for GABA to be inhibitory. This is actually hugely important — in early development, GABA is excitatory, and TrkB-driven KCC2 upregulation is what flips it to inhibitory as the brain matures.

Why It Matters for Mood and Psychiatry​

The BDNF-TrkB axis is central to the leading neurobiological theories of depression. Chronic stress suppresses BDNF expression, shrinks hippocampal neurons, and reduces dendritic complexity — and this correlates strongly with depressive states. Most antidepressants (SSRIs, SNRIs, MAOIs, even ketamine) ultimately converge on upregulating BDNF/TrkB signaling, even if that's not their primary mechanism. It's thought to be a common final pathway for mood recovery.

This is also why the 2021 Casarotto finding was such a big deal — discovering that psychedelics directly bind TrkB (not just indirectly upregulate it) reframed them as potentially a direct neuroplasticity-promoting drug, which has profound implications for their antidepressant and therapeutic effects.

In Simple Terms​

If you had to distill it: TrkB is the receptor through which the brain rewires itself. It's the molecular handshake between "experience" and "lasting structural change." Activate it robustly and you get enhanced plasticity, resilience, and learning capacity. Chronically underactivate it and you get atrophy, rigidity, and vulnerability to depression and cognitive decline.
Alright yeah well there you go. Didn't bother trying to desloppify that second answer at all and I should note it's completely un-factchecked, largely raw LLM output that I'm not qualified to properly assess for accuracy, it could be just completely made up hallucinatory nonsense, although it doesn't sound like complete nonsense, hah, it sounds at least internally consistent and plausible. Maybe someone else more qualified than me can properly factcheck it.
 
Pretty interesting but not too surprising to me, I don't have any personal experience so thought I'd wait a bit before replying but immediately I thought of the racetam nootropics and noopept (which I guess is a more exotic racetam?), all of which are heavily potentiating of many psychedelics, particularly serotonergic ones (at least, IIRC that's mostly what I remember reading about). Cerebrolysin although somewhat different in it's mechanism of action has some overlap, specifically with the BDNF upregulation.

My brain and attention span is currently too destroyed to do the research on this myself so I just asked one of the AIs, I'll copy paste the most relevant parts of the answer with some editing (I asked "Why is it that racetam nootropics including noopept, potential [sic] psychedelic drugs so significantly? I just read that cerebrolysin does also and I assume it's a similar mechanism, something to do with BDNF...?")...



So yeah, TLDR, BDNF upregulation = increased agonism at TrkB receptors, + a serotonergic psychedelic = even more TrkB agonism, I guess.

I must admit I don't really know anything about the TrkB receptors or what they're for, except in the context that using too much noopept can lead to TrkB downregulation, supposedly (>3 months, ballpark, IIRC)... didn't know that the serotonergic psychedelics agonise this receptor either, pretty interesting and I guess that goes some way to explaining the significant nootropic+psychedelic synergy. Ah hell may as well follow up that last query... ("what exactly is the TrkB receptor for?")...

Alright yeah well there you go. Didn't bother trying to desloppify that second answer at all and I should note it's completely un-factchecked, largely raw LLM output that I'm not qualified to properly assess for accuracy, it could be just completely made up hallucinatory nonsense, although it doesn't sound like complete nonsense, hah, it sounds at least internally consistent and plausible. Maybe someone else more qualified than me can properly factcheck it.
I've long held the hunch that BDNF, NGF, and/or TrkB are all related to the likely mechanistic explanation between why noopept, racetams, ___-firams, eutropoflavin, and cerebrolysin have all been reported as amplifying serotonergic psychedelics. A night or two ago, I mixed noopept and DOB and it got my pupils to dilate vertically but not horizontally, like a "cat eye" contact sort of.
 
Pretty interesting but not too surprising to me, I don't have any personal experience so thought I'd wait a bit before replying but immediately I thought of the racetam nootropics and noopept (which I guess is a more exotic racetam?), all of which are heavily potentiating of many psychedelics, particularly serotonergic ones (at least, IIRC that's mostly what I remember reading about). Cerebrolysin although somewhat different in it's mechanism of action has some overlap, specifically with the BDNF upregulation.

My brain and attention span is currently too destroyed to do the research on this myself so I just asked one of the AIs, I'll copy paste the most relevant parts of the answer with some editing (I asked "Why is it that racetam nootropics including noopept, potential [sic] psychedelic drugs so significantly? I just read that cerebrolysin does also and I assume it's a similar mechanism, something to do with BDNF...?")...



So yeah, TLDR, BDNF upregulation = increased agonism at TrkB receptors, + a serotonergic psychedelic = even more TrkB agonism, I guess.

I must admit I don't really know anything about the TrkB receptors or what they're for, except in the context that using too much noopept can lead to TrkB downregulation, supposedly (>3 months, ballpark, IIRC)... didn't know that the serotonergic psychedelics agonise this receptor either, pretty interesting and I guess that goes some way to explaining the significant nootropic+psychedelic synergy. Ah hell may as well follow up that last query... ("what exactly is the TrkB receptor for?")...

Alright yeah well there you go. Didn't bother trying to desloppify that second answer at all and I should note it's completely un-factchecked, largely raw LLM output that I'm not qualified to properly assess for accuracy, it could be just completely made up hallucinatory nonsense, although it doesn't sound like complete nonsense, hah, it sounds at least internally consistent and plausible. Maybe someone else more qualified than me can properly factcheck it.
I worry about Claude citing Casarotto et al (2021).

This paper comes from the Castrén
lab in Helsinki that promotes the idea that psychedelics bind directly to TrkB receptors. It made a pretty big splash when it came out because it was fairly contradictory to the “trkB activation occurs due to BDNF release subsequent to serotonin agonism” theory.

This direct binding theory had some nice bits like an explanation for why SSRIs take so long to take effect (they are low affinity trkb binders, and the duration of treatment until effects correlates with brain levels getting high enough to drive binding to the trkb receptors).

However these conclusions make the serotonin receptor dispensable in the neuroplasticity modulating effects of psychedelics (though obviously serotonin receptors are indispensable for their effects).

This is a pretty big claim, and I find it interesting that it hasn’t really been accepted by other groups in whole. I personally don’t think it’s untrue, but it feels like there is more nuance needed to marry this and some other competing theories into something more comprehensive.

This is one of the issues with AI summaries, is that they don’t consider papers in context with the larger body of work on a subject. To me, the strongest evidence that a theory is true is that it gets used by other groups as a stepping stone for new discoveries.
 
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