DOSINA

2C-I

Psychedelic

A psychedelic similar to the more well-known 2C-B. Users frequently report very vivid and bright open-eye visuals and more mild closed-eye visuals compared to 2C-B and other drugs in the 2C family. Can also be more stimulating than 2C-B along with having a slight body load for some users. Less safe at high doses compared to 2C-B

2ci

Dose and effect data: PsychonautWiki (CC BY-SA 4.0) and TripSit (PolyForm Noncommercial 1.0.0). Less-used substance: fewer independent sources, so treat these numbers with extra caution.

Before you dose

⚠This substance's dose is not reliably weight-scaled - the ranges shown are population figures. Sensitivity varies far more between people than body mass explains.
⚠This substance has combinations that are life-threatening. Check the Interactions tab before mixing anything.

Dose

Published population range

Threshold2 mg
Light5–10 mg
Common10–20 mg
Strong20–30 mg
Heavy / risk zone≥ 30 mg

No weight-based model for this substance — published ranges only.

Check an amount you already have

Timeline (oral)

Onset15–45 minutes
Come-up45–90 minutes
Peak180–300 minutes
Offset120–180 minutes
Afterglow360–1440 minutes
Total360–600 minutes

Bars show relative time in each phase, scaled to the total duration. Each phase keeps its colour in the list above.

Expected effects

  • Visual effects
  • Euphoria
  • Stimulation

Possible side effects

  • Nausea
  • Muscle tension
  • Anxiety
  • Vasoconstriction
  • Limited safety data

Known toxicity

  • toxic dose is unknown

Harm reduction

  • Set and setting shape a psychedelic experience more than the dose does. Plan the room, the music, the company and the exit before you take anything.
  • Have a sober person present, or at minimum someone who knows what you have taken and can be called.
  • Do not redose to 'make it stronger'. Tolerance to psychedelics develops within an hour, so a redose mostly extends the experience and increases the risk of a difficult one.
  • Avoid combinations with lithium (seizure risk) and tramadol, and be extremely careful with cannabis, which sharply intensifies the experience.
  • People with a personal or family history of psychosis, schizophrenia or bipolar disorder should not use psychedelics - this is the clearest contraindication in the literature.
  • Never drive, cycle or operate machinery, and do not take psychedelics in public places or around crowds you cannot leave.
  • Physically: expect dilated pupils, raised heart rate and reduced appetite. These are normal. Chest pain, fainting or seizure activity is not - get help.
  • Frequency matters: repeated use within days has sharply diminishing returns and increases the risk of persistent visual disturbances.

Identify what you have

Marquis (reacts)dark green > black (36)
Mecke (reacts)brown > black (72)
Mandelin (reacts)brown > black (87)
Liebermann (reacts)Black (121)
Froehde (reacts)Orange -> Black (36)
Ehrlichno color change (168)
Robadope (reacts)Blue spots (11)
Simon'sreddish with grey spots (163)
Hofmann (reacts)(slow) light yellow (31)
Morris (reacts)pale green (77)

Reagent tests show what a substance probably is, not how pure it is or what else is in the mix. Fentanyl and nitazene test strips are the only reliable check for those, and quantitative lab testing is better than both.

Mixing

LithiumDangerous

See interaction notes for details.

TramadolUnsafe

See interaction notes for details.

CannabisCaution

See interaction notes for details.

StimulantsCaution

See interaction notes for details.

Tolerance, dependence and detection

Tolerancehalf tolerance after 3-5 days; back to baseline after 7-10 days
Addiction potentialnot habit-forming
After-effects4-12

Sources

• PsychonautWiki — 2C-I (CC BY-SA 4.0)
https://psychonautwiki.org/wiki/2C-I

• TripSit wiki — 2C-I (PolyForm Noncommercial)
https://wiki.tripsit.me

• Erowid experience reports (external)
https://www.erowid.org/experiences/subs/exp_2CI.shtml

Dosina is educational harm-reduction information, not medical advice. Doses are population ranges from published sources and cannot account for your tolerance, health conditions or what is actually in your substance. Possession and use may be illegal where you live.