U-47700

U-47700 is a synthetic opioid of the benzamide chemical class that produces analgesic, sedating, and euphoric effects. Developed by Upjohn in the 1970s through extensive structure-activity research, it demonstrates approximately 7.5 times the potency of morphine. Despite its research origins, U-47700 has very little history of human use and limited toxicity data. Reports indicate unusual caustic properties that may cause significant tissue damage, particularly when injected.

Also known as: U4, Pink, Pinky, Pink heroin

Classification

Chemical: Opioid
Psychoactive: Depressant
Tag: Benzamide
Tag: Habit-Forming
Tag: Research-Chemical
Tag: Synthetic opioid

Effects

Analgesia
Pupil Constriction
Respiratory Depression
Increased Heart Rate
Sedation
Muscle Relaxation
Euphoria
Mood Lift
Anxiety
Anxiety Suppression
Cognitive Euphoria
Cognitive Fatigue
Dulled Perception
Appetite Suppression
Sexual Dysfunction
Light Sensitivity
Disinhibition
Tactile Suppression

Routes of Administration

Oral

Dosage

Heavy: 25 mg
Light: 5 – 7.5 mg
Common: 7.5 – 15 mg
Strong: 15 – 25 mg
Threshold: 5 mg

Duration

Onset: 0.25 h
After Effects: 1-4 h

Insufflated

Dosage

Heavy: 10 mg
Light: 2 – 6 mg
Common: 6 – 8 mg
Strong: 8 – 10 mg
Threshold: 2 mg

Duration

Onset: 0.1-0.2 h
Comeup: 0.25-0.33 h
Peak: 1-2 h
After Effects: 2-4 h

Harm Reduction

Check interactions before mixing substances, pay attention to dose spacing and hydration, and treat all dosage guidance as approximate rather than guaranteed safe.

Sources

Substance data is aggregated from the following public harm-reduction and reference sources.

Links

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