DOSE:	10 mg	insufflated	HDMP-28	(powder / crystals)
	1 bump	insufflated	HDMP-28	(powder / crystals)
	repeated	smoked	Cannabis	(plant material)
			Tobacco - Cigarettes

BODY WEIGHT:

135 lb

My brother received a sample of the piperidine drug HDMP-28 aka Methylnaphtidate from an online vendor. My past experiences with subtances include cocaine, amphetamines, MDxx, Mushrooms, LSD, LSA, DMT as well as 4-AcO-DMT and 5-MeO-DMT, various opiates/oids, kratom, salvia, nitrous oxide, DXM, syrian rue, Phenibut, Tianeptine and an assortment of nootropics that I take regularly which I will go into detail so as to mention the variables of my experience.

I have no tolerance to stimulants and I take nootropics regularly which I ingested prior to the HDMP-28, these are neuroprotective and will help reduce neurotoxicity such as:
Agmatine - is known to lower tolerance to stimulants via NMDA antagonism and is an endogenous substance found in the human body.
Tianeptine - a general synergy was felt due to the anxiolytic and antidepressant effects.

I had also taken roughly 7 grams of Gold Kalimantan kratom at 9 AM, the effects were completely gone by the time I took the HDMP-28 and but continued to smoke throughout the day for a grand total of under 1 gram of weed even the light 'comedown'.

T-0:15 ~ 8:30pm
I arrive at a bonfire by the river where my brother and his friends are having a session in the dark. Bowls of dank, potent mexican salvia and my brother's new godly freebased syrian rue (sodium carb method). I decide to stick to weed, however I also smoked cigarettes as they had rolled some for selling.

T-0:05
My brother makes me 1 small line of HDMP-28, roughly 10mg. It appears to be a similar dose, in term of physical size, to that of tryptamines.

[Erowid Note: Two samples of powder (even of the same chemical) with equivalent volumes won't necessarily weigh the same. For this reason, eyeballing is an inaccurate and potentially dangerous method of measuring, particularly for substances that are active in very small amounts. See this article on The Importance of Measured Doses.]
T-0
Up the chimney. No initial burn or rush to speak of.

T+0:05
Slight drip, tastes similar to methylphenidate IMO not the worst tasting thing. I normaly snort water at this stage with any insulfated stim sadly I forget due to the lack of initial burn. Big mistake. The effects begin here and subjectively feel like a more clean version of ritalin or coke initialy. Very pleasuring and smooth, no jaw clenching or tension whatsoever. Norepinephrine is almost unnaffected.

T+0:20
Second bump, a bit bigger ~ 15mg.
A burning sensation in my sinus starts and drips down my throat. The pain is mild but constant and dysphoric. I snort drops of water to dilute the HCl. If MDMA is a 7 this would be a 4.5 in terms of pain.

T+0:40
The burning finaly stops and I return into euphoria, the effects become more sedating and I begin to see tracers as well as tingling sensations on the skin. I smoke some weed however the syrian rue residue in my bong was also absorbed and I began to sweat profusely and became nauseaus and disoriented.

T+0:45 I puke. Immediately feel better. The high feels even more serotonergic now but I seem to have plateaued.

T+ 2:00
I go home longboarding. The comedown is slow and unnoticeable, none of the side effects commonly noticed were noticed except mild fatigue. My mood was decreased only to baseline however with repeated dosing / abusive personality this would not be the case.

All in all I would definitely repeat the experience and would say HDMP-28 is my new favorite occasional stim. It makes molly or coco seem too pushy to be enjoyable. There is also potential for energy boost depending on set and setting (dancing). I was at a quiet, dark campfire with a few good friends and had an amazing time

Exp Year: 2014	ExpID: 106954
Gender: Male
Age at time of experience: 19
Published: Sep 2, 2015	Views: 10,807
[ View PDF (to print) ] [ View LaTeX (for geeks) ] [ Swap Dark/Light ]
HDMP-28 (706) : Small Group (2-9) (17), Combinations (3), First Times (2), General (1)