[Solved] 2C-G-5

2C-G-5 is a very rare psychedelic phenethylamine from the 2C family. The substance was first described by Alexander Shulgin in PiHKAL, but remained virtually unknown for decades. Only since the new NPS law of July 2025 it keeps popping up as a new psychoactive substance. Because it falls outside the NPS ban, it will likely become increasingly well-known.

It is important to know that there no modern pharmacological or toxicological studies exist. Everything we know comes from Shulgin's description and from a small number of recent anecdotal accounts. This means that the level of knowledge is low and uncertainties are high.

What does come back consistently:
2C-G-5 works extremely long, often 32 to 48 hours. The build-up is slow and sometimes misleading, causing effects to become apparent only much later.

Is 2C-G-5 comparable to 2C-B?

Partially, but it is not a “2C-B-like” in a practical sense.

Agreements:
– it is a 2C-phenethylamine
– visual effects can be bright and colorful
– some people experience heightened sensuality or eroticism

Differences:
– 2C-G-5 works much longer then 2C-B
– the mental experience is often flat or more distant
– physical strain is more clearly present
– the experience is less playful and less social
– after-pain and exhaustion occur more frequently

Many users who like 2C-B actually indicate that 2C-G-5 heavier and less rewarding feels, despite sometimes beautiful visuals.

In short: it can visually remind one of 2C-B, but In terms of character and taxation, it hardly resembles it..

What do you feel with 2C-G-5?

That varies greatly from person to person, but a pattern does emerge from multiple experiences.

Psychological:
– often clear consciousness without loss of ego
– little confusion, little dissociation
– sometimes euphoria and inner peace
– sometimes actually an empty or “locked-in” feeling
– little symbolism or deep insights among many people

Physical:
– severe fatigue and frequent yawning
– tense or stiff muscles
– feeling cold or disturbed temperature regulation
– difficulty sleeping despite exhaustion
– headache and sluggishness the next day

It is striking that many people indicate that 2C-G-5 is physically heavier than psychologically, which is unusual for a psychedelic.

What is a “good” dosage?

I need to be very clear here:
there exists no safe or reliable “proper dosage” in the sense of practical advice.

What is known from the literature:
Alexander Shulgin described a oral dose range of 10–16 mg.

However, this comes with important caveats:
– this is not a modern safety guideline
– individual sensitivity varies enormously
– products may be under- or overdosed
– the dose-response seems non-linear
– redosing is particularly risky due to the slow build-up

In recent experiences, we see:
– some people feel virtually nothing at comparable amounts
– others, on the other hand, become overstimulated for a prolonged period
– the effects are difficult to correct once they are running

Therefore, it is more accurate to say:
2C-G-5 is not a substance for which “a proper dosage” can be reliably determined.

So:

2C-G-5:
– is little researched and poorly understood
– works extremely long
– is not really comparable to 2C-B
– often feels physically demanding
– has a unpredictable effect profile
– provides for many people little psychological return on
– Is for psychedelic therapy not or hardly suitable.
– It might very possibly be useful for microdosing, provided the dosage can be properly adjusted and if research shows that it is not harmful in the short or long term.

Precisely because it offers no clear balance between duration, intensity, and reward, a striking number of experienced users indicate that they have no need for repetition.

The long duration of 2C-G-5 seems excellent to me for establishing a kind of base effect. So, a light trip for a day and then topping up a desired peak with truffles or LSD. That way, you can trip hard for a shorter period and then enjoy the afterglow on the 2C-G-5.

Has anyone tried this yet?

I got this from a friend and tried it. The trip was nothing special, and to top it all off, I slept poorly for two days. It really is a letdown. You're better off doing Mescaline or LSD with MDMA for a slightly longer, but still good experience.