Pyrazolone

Pyrazolone, a five-membered-ring lactam, is a derivative of pyrazole that has an additional keto (=O) group.

It has a molecular formula of C₃H₄N₂O.

Examples of derivatives include:

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Anti-inflammatory products (M01A)

Pyrazolidine/Butylpyrazolidines

Ampyrone • Clofezone • Kebuzone • Metamizole • Mofebutazone • Oxyphenbutazone • Phenazone • Phenylbutazone • Sulfinpyrazone • Feprazone •

Acetic acid derivatives
and related substances

Aceclofenac • Acemetacin • Alclofenac • Bromfenac • Bumadizone • Bufexamac • Diclofenac • Difenpiramide • Etodolac • Fentiazac • Indometacin • Ketorolac • Lonazolac • Oxametacin • Proglumetacin • Sulindac • Tolmetin • Zomepirac • Amfenac

Ampiroxicam • Droxicam • Lornoxicam • Meloxicam • Piroxicam • Tenoxicam

Propionic acid derivatives

Alminoprofen • Benoxaprofen • Dexibuprofen • Dexketoprofen • Fenbufen • Fenoprofen • Flunoxaprofen • Flurbiprofen • Ibuprofen • Ibuproxam • Indoprofen • Ketoprofen • Naproxen • Oxaprozin • Pirprofen • Suprofen • Tiaprofenic acid

Flufenamic acid • Meclofenamic acid • Mefenamic acid • Tolfenamic acid • Niflumic acid • Morniflumate • Azapropazone •

Celecoxib • Etoricoxib • Lumiracoxib • Parecoxib • Rofecoxib • Valdecoxib

Other

Nabumetone • Glucosamine • Benzydamine • Glycosaminoglycan • Magnesium salicylate • Proquazone • Superoxide dismutase/Orgotein • Nimesulide • Diacerein • Tenidap • Oxaceprol • Chondroitin sulfate

M: MUS, DF+DRCT

anat (h/n, u, t/d, a/p, l)/phys/devp/hist

noco(m, s, c)/cong(d)/tumr, sysi/epon, injr

proc, drug (M1A/3)

Non-steroidal anti-inflammatory drug (NSAID) products (primarily M01A and M02A, also N02BA)

Salicylates	Aspirin (acetylsalicylic acid) • Aloxiprin • Benorylate • Diflunisal • Ethenzamide • Magnesium salicylate • Methyl salicylate • Salsalate • Salicin • Salicylamide • Sodium salicylate

Arylalkanoic acids	Diclofenac • Aceclofenac • Acemetacin • Alclofenac • Bromfenac • Etodolac • Indometacin • Indometacin farnesil • Nabumetone • Oxametacin • Proglumetacin • Sulindac • Tolmetin

2-Arylpropionic acids (profens)	Ibuprofen • Alminoprofen • Benoxaprofen • Carprofen • Dexibuprofen • Dexketoprofen • Fenbufen • Fenoprofen • Flunoxaprofen • Flurbiprofen • Ibuproxam • Indoprofen^† • Ketoprofen • Ketorolac • Loxoprofen • Miroprofen • Naproxen • Oxaprozin • Pirprofen • Suprofen • Tarenflurbil • Tiaprofenic acid

N-Arylanthranilic acids (fenamic acids)	Mefenamic acid • Flufenamic acid • Meclofenamic acid • Tolfenamic acid

Pyrazolidine derivatives	Phenylbutazone • Ampyrone • Azapropazone • Clofezone • Kebuzone • Metamizole • Mofebutazone • Oxyphenbutazone • Phenazone • Sulfinpyrazone

Oxicams	Piroxicam • Droxicam • Lornoxicam • Meloxicam • Tenoxicam • Ampiroxicam

COX -2 inhibitors	Celecoxib • Deracoxib^‡ • Etoricoxib • Firocoxib^‡ • Lumiracoxib^† • Parecoxib • Rofecoxib^† • Valdecoxib^†

Sulfonanilides	Nimesulide

Topically used products	Bendazac • Diclofenac • Etofenamate • Felbinac • Flurbiprofen • Ibuprofen • Indometacin • Ketoprofen • Naproxen • Piroxicam • Suprofen

COX-inhibiting nitric oxide donators	Naproxcinod

Others	Fluproquazone

Items listed in bold indicate initially developed compounds of specific groups. ^†Withdrawn drugs. ^‡Veterinary use medications.