Cinaproxen is naproxen derivative developed by Nicox S.A. for oxidative stress prevention and treatment.

Verilopam is a potent analgesic.

Diacetamate (Acetaminophen Acetate, Acetaminophen Impurity, diacetyl-p-aminophenol) is a acetaminophen synthetic impurity. Acetaminophen-aspirin mixtures have lower stability due to acetylation of the former by the latter, producing diacetyl-p-aminophenol.

Dexproxibutene is an experimental agent structurally related to propoxyphene. It is an analgesic agent. Dexproxibutene is not very effective in rheumatoid arthritis pain relief. It is intermediate in effectiveness between distalgesic, codis, aspirin and placebo.

Nerbacadol is an analgesic agent.

Proheptazine is a substituted azacycloalkane patented by American Home Products Corp. as an opioid analgesic. Proheptazine produces similar effects to other opioids, including analgesia, sedation, euphoria, dizziness and nausea.

Alphamethadol is a synthetic opioid analgesic. Alphamethadol is composed of two isomers itself, L-α-methadol, and D-α-methadol. L-α-methadol is an important active metabolite of levacetylmethadol (LAAM), a medication therapy for individuals addicted to opiates that provides an alternative to methadone. Isomers of Alphamethadol bind to and activate the μ-opioid receptor; they are active as opioid analgesics.

Tomoxiprole belongs to the class of 3-alkyl-2-aryl-3H-naphth (1,2-d)imidazoles. It is a nonsteroidal anti-inflammatory compound that was reported to have low ulcerogenic potential. Tomoxiprole inhibition of cyclooxygenase-2 but not cyclooxygenase-1 is time-dependent. It has anti-inflammatory activity in various anti-inflammatory models such as carrageenin and nystatin oedemas, cotton pellet granuloma and adjuvant arthritis. The anti-inflammatory potency of tomoxiprole is greater than that of acetylsalicylic acid and phenylbutazone, but lower than that of indomethacin. Tomoxiprole reduced PGE2 and 6-keto-PGF1 alpha levels more effectively in inflamed tissue than in gastric mucosa when assayed in in vivo experiments, whereas indomethacin and other non-steroidal anti-inflammatory drugs are equally effective in both systems.

Clantifen is an aminothiophene derivative invented by Hoersht AG. The compound is claimed to have antiphlogistic and antipyretic properties.