meperidine

noun 0.737

diamorphine

noun 0.656

morphine

noun 0.650

methadone

noun 0.636

methedrine

noun 0.609

tramadol

noun 0.599

codeine

noun 0.597

diprenorphine

noun 0.596

pentazocine

noun 0.590

diacetylmorphine

noun 0.589

opiate

noun 0.585

ethylmorphine

noun 0.583

fentanyl

noun 0.582

dihydrocodeine

noun 0.579

paracetamol

noun 0.578

phencyclidine

noun 0.574

pheniramine

noun 0.574

hydromorphone

noun 0.572

remifentanil

noun 0.569

met-enkephalin

noun 0.567

phenmetrazine

noun 0.564

mefenamic acid

noun 0.560

opium

noun 0.557

pendimethalin

noun 0.556

phenytoin

noun 0.556

dimethenamid

noun 0.553

pregabalin

noun 0.551

epidural

noun 0.550

mephedrone

noun 0.547

ketamine

noun 0.546

pemetrexed

noun 0.546

phenobarbitone

noun 0.545

butorphanol

noun 0.544

painkiller

noun 0.543

opioid

noun 0.543

enkephalin

noun 0.541

mephenytoin

noun 0.540

oxycodone

noun 0.540

indometacin

noun 0.539

morphia

noun 0.538

pentamidine

noun 0.538

methamphetamine

noun 0.538

heroin

noun 0.536

phenylpropanolamine

noun 0.535

dexmedetomidine

noun 0.534

piroxicam

noun 0.532

ephedrine

noun 0.530

thiopental

noun 0.529

methylphenidate

noun 0.529

pimobendan

noun 0.528

pamidronate

noun 0.525

narcotic

noun 0.522

aminophylline

noun 0.519

permethrin

noun 0.519

papaverine

noun 0.518

pendetide

noun 0.517

pyrimethamine

noun 0.517

meth

noun 0.514

mepivacaine

noun 0.514

metoclopramide

noun 0.511

levorphanol

noun 0.511

dextropropoxyphene

noun 0.511

midazolam

noun 0.510

methylene diphosphonate

noun 0.510

paroxetine

noun 0.509

amitriptyline

noun 0.507

methysergide

noun 0.506

fosphenytoin

noun 0.505

diphenylmethane

noun 0.505

methylprednisolone

noun 0.504

ergometrine

noun 0.504

propofol

noun 0.503

domperidone

noun 0.502

phenacetin

noun 0.502

endorphin

noun 0.502

pamoate

noun 0.502

dimethoate

noun 0.501