on March 4 2023 I injected my third dose of Cerebrolysin (2ml in the ventroglute). Within thirty seconds I felt very floaty and strange... I began to develop chronic headaches and there was/is a terrible pressure inside my head that rarely abates
Bad reaction2 mL · Injection · 3 doses
Cosmic Nootropic batch; was also taking other supplements and TRT
Strict case
Cochrane found more non-fatal serious adverse events than placebo; animal-derived injectable with allergy/immune reaction risk.
Users report
Strong anecdotes, especially from TBI, long-COVID and stutter users (sleep, recall, mood, anxiety), with cycle-and-repeat loyalty. Perhaps 25-35% notice nothing after a full cycle, a recurring group feels much worse for 1-3 weeks mid-cycle, and there are a few alarming threads (persistent dysautonomia, small-fibre neuropathy) after injection or nasal use.
Best effects
Better sleep · recall and word-finding after brain injury · reduced anxiety/panic · mood lift
Downsides
IM injection pain, light-headedness · mid-cycle fog/fatigue/emotional lows · cost and sourcing (counterfeits; only EVER Pharma considered genuine)
Watch
Cochrane 2023 (7 RCTs, 1773 pts): more non-fatal serious adverse events than placebo, RR 2.39 (95% CI 1.10-5.23), moderate certainty · animal-derived protein mix: anaphylaxis/allergy; labelled contraindications include epilepsy and severe renal impairment · anecdotal autoimmune-type reactions (neuropathy, persistent dysautonomia), especially after nasal use
Evidence
Approved drug — approved in roughly 40+ countries, mainly Eastern Europe and Asia (not US/UK); human RCTs (stroke), mixed
Typical use
5-10 mL IM daily, 5 on/2 off for 4 weeks (community); higher IV doses clinically.
Getting it
Pharmacy drug in Austria, Eastern Europe, Russia, Asia and Latin America (sold as Renacenz in Mexico); not approved in the US or UK, where people import it from online pharmacies or buy from a few US compounding pharmacies. Chinese 'cerebroprotein hydrolysate' vials are a different, unverified product.
Stacked with
Cortexin: Often run together (Cerebrolysin used to reconstitute the Cortexin vial) or rotated between courses. · Semax or Selank: Common companions in TBI and anxiety protocols; one user found Cerebrolysin removed Semax's insomnia. · Growth hormone: Some heavy users claim synergy; GH lethargy plus Cerebrolysin brain fog was described as brutal at higher doses. · Stimulants and dopaminergic drugs: Users report it raises sensitivity to stimulants and nicotine, so doses that were normal before can feel too strong.
I have had insomnia for years and have tried everything known to man…natural supplements, OTC, even prescription meds and nothing has helped. Just did my first cycle of Cerebrolysin (20 days 5mg) and my sleep scores are awesome now with 7-8 hrs!
I used Cerebrolysin to treat my panic disorder and by some miracle it eradicated most of it. I was having multiple panic attacks a day for around 3 months (sudden onset OCD, GAD, panic disorder when I was 21), and after the first Cerebrolysin injection I haven’t had another one.
the positive impact wasn’t quite immense for me but certainly noticeable and actually made a difference in my life. I feel words come easier, my split second reactions are better, and I am just a lot more quick to respond.
Didn't get the results I was looking for but got great results I wasn't expecting. I wanted better focus and memory recall, what I got was better sleep, and a significant decrease in anxiety, imparticular social anxiety.
I used to play college football and box and it definitely helped my memory and general sense of being “present”. It did cause a small uptick in anxiety for me, but it also helped my depression.
Have long Covid. Did one three week cycle and felt sharper towards the end and few weeks after my cycle. Didn’t really touch the fatigue, malaise, exercise intolerance, heart pain, orthostatic intolerance but a win is a win.
When I finished the 4 boxes, I hit a wall. My brain stopped receiving the external peptides and went into extreme energy-saving mode. I experienced a very dark "dopamine valley": apathy, lack of motivation, and anhedonia.
Overall, memory is actually slightly worse than it used it to be! My scores are approx 10% lower on average than when I started on my test programs I use. Very disappointing.
I did 5 rounds of Cerebrolysin looking for memory and focus benefits. I didn't get them. Like you, I only had better sleep and anxiety benefits, but nothing in cognitive terms.
MixedMemory · 5 rounds
memory problems after alcohol, cocaine and cannabis use
I ran 10 ml 5 days a week for 4 weeks which I think is a pretty standard dose. I wasn’t expecting drastic results but I was hoping for some sort of improvement on my brain fog and mental sharpness. Unfortunately, I didn’t notice a single thing.
So, I’ve run a cycle of cerebrolysin for 5-days consisting of 20 mL per day being inject into my quads and I’ve felt nothing so far. Extremely disappointed.
I did three weeks worth including injections and IV and then I went to MemoProve which is the pill form made by EverPharma. Honestly, did nothing. And I’d love to believe.
NothingInjection · 3 weeks IM and IV, then oral MemoProve
Unlike other nootropics, which noticeably boosted my alertness, motivation, typing speed, verbal fluency, and wit, cerebrolysin has yielded no comparable benefits.
I felt amazing on the first, second, and third day. Now, I feel like complete shit. Extremely emotional, can’t focus, can’t even think, no energy—totally fucked up. Not myself and totally disconnected.
Negative5 mL/day · Injection · 8 days
TBI from a motorcycle accident; EverPharma product
I woke up and felt like absolute shit. I mean like it literally felt like I drank a fuck ton, blacked out and woke up with a horrible hangover. My brain fog right now is horrific, I tried to play chess and genuinely could not think past a single move.
Had some acute brain fog for the first couple doses but felt pretty clear and was sleeping better, and felt more clearheaded than normal over the weekend. Now this week have felt worse than baseline the whole time. Super tired, foggy, etc.
Negative5 mL/day, 5 on/2 off · Injection · 9 injections
brain damage from a decade of binge drinking; EverPharma product
Something strange started happening yesterday and today. I'm starting to feel really angry, upset and depressed. Even though my life is going great and I haven't felt anything like this for many years. It feels like a heavy pressure in my brain
NegativeAnxiety · 2-4 sprays per nostril daily · Nasal · 5 days (after 25 earlier IM injections)
on March 4 2023 I injected my third dose of Cerebrolysin (2ml in the ventroglute). Within thirty seconds I felt very floaty and strange... I began to develop chronic headaches and there was/is a terrible pressure inside my head that rarely abates
Bad reaction2 mL · Injection · 3 doses
Cosmic Nootropic batch; was also taking other supplements and TRT
Random tingling, prickling, and electrical shock sensations throughout my body, especially my hands and feet. Widespread redness and flushing across my face, chest, arms, and back. Skin that feels hot, sensitive, and almost sunburned.
Bad reaction10 mL (after 100+ mL at 5 mL without issue) · Injection · single dose in a new cycle
I developed very painful small fiber neuropathy after taking cerebrolysin.Propably its autoimmune reaction. I m extremely tired feeling cold all the time and habing pins and needle all over my body.
Bad reaction5 mL x5 days then 10 mL x7 days · 12 days
pharmacy product prescribed by a UK neurologist for noise-induced tinnitus and headaches
I noticing a stimulating effect right after administration followed by a rash that developed on my chest. That night I slept very badly and when I woke up I had a tingling/prickling feeling in my hands and feet. These symptoms intensified and spread throughout my body
Bad reaction5 mL · IV · single infusion
given by a doctor in Vienna from a pharmacy (genuine EverPharma)
An undefined mix of porcine brain peptides given by injection: immune and allergic activation is credible, and the label warns that seizure frequency may rise in epilepsy. Cerebrolysin Austrian SPC (EVER Pharma) ↗
Epilepsy, especially status epilepticus (label) · Severe kidney impairment (label) · Allergy to porcine proteins · Pregnancy or breastfeeding (no human reproductive data)
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Report grades
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Researcher estimate
No first-hand report of this peptide has been graded yet, so the figure is the researchers' own rating out of 10 from what they read about it. It ranks alongside the computed scores until reports arrive.
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Each peptide is tiered clean, caution or excluded from its five risk axes under the chosen safety bar. An excluded peptide has a plausible route to serious harm, so it stays listed with the reason but ranks behind every other entry, however good its reviews.
Safety bar
The safety bar sets how much risk it takes to exclude a peptide. Strict: out on any serious mechanism with little human data, or any documented serious harm. Balanced: out on documented serious harm (unless it is obvious, reversible and from a regulated product), or a serious mechanism whose harm would be silent with no human data at all. Evidence only: out only on documented serious harm in humans that is lasting, delayed or from grey-market product.
Seen harm
Documented serious adverse events in humans, from 0 for none despite real exposure to 3 for deaths or several well-documented serious harms. Serious means a hospital or emergency visit or harm lasting weeks, so a headache or a bad night does not count.
Mechanism
A plausible biological route to serious harm at the doses people use, such as growth-factor signalling, hormone-axis suppression, heart or blood-pressure effects or immune activation. It runs from 0 when none is known to 3 when a dangerous pathway has been shown in living animals.
Data gap
How little human safety data exists for the molecule actually sold, from 0 for an approved drug with large trials and years of use to 3 for no human safety data at all. A modified analogue does not inherit its parent's trials.
Silent harm
Whether the feared harm would show quickly or stay hidden, from 0 when it is obvious and goes on stopping to 3 when it is silent and delayed, like tumour promotion or slow organ damage. User reports cannot reveal a harm that takes years to appear, so a high score here limits what good reviews can tell you.
Product
The risk of what people actually buy, from 0 for a regulated pharmacy or supplement product taken by mouth or on the skin to 3 for a grey-market injectable. In one dataset of 6,441 grey-market samples, 42–71% failed basic quality criteria and 15% carried endotoxin.
Evidence
The strongest kind of study behind the peptide's effects, from an approved drug through human controlled trials and small human studies to animal work or nothing of its own. Animal results often fail to carry over to people.
Access
How people get it: as an approved drug, a compounded prescription, an over-the-counter supplement or from the grey market, where nobody checks the vial. The channel decides both the legal position and the risk of a bad batch.
Price per month
Thirty days of the typical dose, from its low end to its high end, priced at the listing a careful buyer would choose: in stock, from a shop scoring 4 of 5 on trust (third-party tested where no score is set), failing that 3, a pure pack before a blend, a European shop first, then the cheapest per mg. The range is the dose's, not the shops'. A per-dose amount counts once a day unless the dose says otherwise. Prices are in euros at ECB rates of 2026-10-29, before shipping; the shop table keeps each listing's price per mg, per gram for bulk supplements. Where no listing can be priced the researchers' own estimate stands in, and says so.
Dose users report
The middle half of the daily doses stated in at least five first-hand reports, vendor posts left out. Where its middle sits more than twice above or below the declared dose, the month is priced at it as well, since what people take is what they pay for.
Testing
Whether the shop publishes lab results: third-party tested means an independent lab checks each batch, own COA means the shop's own certificate of analysis, and no public tests means neither. A certificate shows purity, not safety.
Added peptide
Some packs sold under one peptide's name hold a second one, such as 5 mg GHK-Cu in a nasal kit, stated only in the description. Sprayed in the nose or injected it reaches the blood like an injection, so it carries the risk of that route and is tiered as the injectable form, whatever its tier on the skin. A pack whose page gives no contents list may hold more than its name.