When we are talking about the properties of the diclofenac active substance we should say that it is one of the most powerful analgesics directly under the opoid analgesics
Diclofenac (sold under a number of trade names)
is a nonsteroidal anti-inflammatory drug (NSAID)
taken or applied to reduce inflammation and as an analgesic reducing pain in certain conditions.
It is supplied as or contained in medications under a variety of trade names.
The name "diclofenac" derives from its chemical name: 2-(2,6-
phenylacetic acid. Diclofenac was first synthesized by Alfred Sallmann
and Rudolf Pfister and introduced as Voltaren by Ciba-Geigy (now Novartis) in 1973.
In the United Kingdom, United States, India, and Brazil diclofenac may be supplied
as either the sodium or potassium salt; in China, it is most often supplied as the sodium salt,
while in some other countries it is only available as the potassium salt.
It is available as a generic drug in a number of formulations,
including diclofenac diethylamine, which is applied topically.
Over-the-counter (OTC) use is approved in some countries for
minor aches and pains and fever associated with common infections.
As of 2015 the cost for a typical month of medication in the United States is 50 to 100 USD.
The drug's use in animals is controversial due to its toxicity
which can rapidly kill scavenging birds that may eat dead animals.
It has been banned for veterinary use in many countries.