HDMP-28

Methylnaphthidate (other names: HDMP-28, DL-Threo-methylnaphthidate) is a stimulant of the group of substituted phenidate, a homologue of methylphenidate, which has similar effects.

Chemistry

The difference between methylnaphthidate and methylphenidate is the replacement of the main phenyl ring with a naphthalene group.

Pharmacology

HDMP-28 is a relatively new drug and there is little data on its toxicological and pharmacological properties, all the information provided is based on studies in mice.
Methylnaphthidate acts as a monoamine reuptake inhibitor with a difference from the standard dopaminergic stimulants and is a serotonin reuptake inhibitor.
This substance causes effects such as stimulation, quickened thinking, increased concentration, increased blood pressure, teeth grinding, increased action and euphoria.

Dosage

Threshold 4 mg
Light 10 – 15 mg
Common 15 – 30 mg
Strong 30 – 50 mg
Heavy 50 mg +
Duration
Total 2 – 5 hours
Onset 1 – 10 minutes
Peak 1.5 – 2 hours
Offset 1.5 – 2 hours
After effects 1 – 8 hours

Legal status

Germany: NpSG (Industrial and scientific use only)
Switzerland: Controlled substance by law
UK: Class B
Canada: Schedule III