Hallucinogen, Avatarr's
The body fluids, including blood and saliva, of the alien Avatarr — who was acting as the head of the company Alchemax — contain a potent hallucinogen.
His exact alien species remains unknown and has not been encountered before or since.
The saliva also contains an acid.
Doom 2099 #31

Happy Meds
Pediatric medications sold at the fast food style clinic, Medi-Kwik, in Transverse City.
The name is clearly a play on McDonald's Happy Meals, but the medications probably also works as antidepressants.
Ghost Rider 2099 #6

Medicillin
A common antibiotic in the world of Marvel's 2099. Available at Medi-Kwik franchises.
Ghost Rider 2099 #6

Megavil
A drug created by Alchemax and heavily marketed on television and other media. It is a combination pain killer and psychiatric medication.
Contains activated polydimorphine.
Ad Copy: "Two out of three clinical studies agree! Nothing stops the steering pain and itch of existential angst and unfulfilled ambition faster than Megavil."
Ad Copy: "It's proven two hundred times more effective than the leading brand!".
Ghost Rider #1

Milk
The slang term for dairy products with narcotic properties in the world of 2099.
Also called "Moo Juice."
The beverage of choice of various street gangs.
World of 2099 #5

Moo Juice
Another slang term for narcotic laced dairy-products.
World of 2099 #5

Mnemopromethylene
A strong injectable sedative used by the security forces of the megacorporation D/Monix.
It is a synthetic hormone that affects the hippocampus
High doses of Mnemopromethylene can cause Induced Repetitive Menemonic Syndrome, which causes severe memory loss and can leave the victim in a coma.
That condition is potentially treatable with Nootropine a banned drug.
Ghost Rider 2099 #4, #6

Mr. Ed
An illicit drug in Marvel's 2099 universe. Its effects are unknown as it was only mentioned once in passing.
Doom 2099 #23

Necrotoxins
A toxic gas sprayed on crowds that reduces organic matter — including people — to protein-rich sludge.
The gas leaves all metal and technological items intact.
It was used by the Narco-Presidente of Colombia against his own people in Bogota, and by the Angel's Breath corporation against rebels in Makhelastani.
John Herod, the leader of the anti-Doom coup, used Necrotoxins against the populace of Latveria.
 
Survivors often suffer temporary insanity, but some develop physical mutations and a permanent madness; these latter are referred to as "mutalocos."
 
The venom of certain crabs may provide some protection against Necrotoxins.
Quote: "Necrotoxins were created in Europe in the 2070''s, when poverty-stricken starving Italy found a use for the overstuffed concentration camps they kept in the Basque territory.
They sprayed the thousands of inmates with the chemical, which swiftly reduced them to a protein-rich sludge that could later be cheaply converted into foodstuffs."
Doom 2099 #28, #35

Neurocotics
Illegal drugs derived from plants and fungi that are manufactured and used on remote asteroid colonies.
These same colonies also produce illegal stimulants.
Punisher 2099 #34

Nootropine
A psychoactive medication banned by the government as it allows people to escape mind control and other psychological conditioning.
2-4-5 Trioxidiclorizide, a dangerously toxic chemical, is a required precursor for producing Nootropine.
Quote: "Tested briefly back around '54 or so, it had the effect of rendering the brain 'plastic,' freeing it from habitual neural responses."
Ghost Rider 2099 #6