Anti-inflammatory refers to the property of a substance or treatment that reduces inflammation. Anti-inflammatory drugs make up about half of analgesics, remedying pain by reducing inflammation as opposed to opioids, which affect the central nervous system.
Non-steroidal anti-inflammatory drugs 
Non-steroidal anti-inflammatory drugs (NSAIDs), alleviate pain by counteracting the cyclooxygenase (COX) enzyme. On its own, COX enzyme synthesizes prostaglandins, creating inflammation. In whole, the NSAIDs prevent the prostaglandins from ever being synthesized, reducing or eliminating the pain.
Some common examples of NSAIDs are: aspirin, ibuprofen, and naproxen. The newer specific COX-inhibitors - although, it is presumed, sharing a similar mode of action - are not classified together with the traditional NSAIDs.
On the other hand, there are analgesics that are commonly associated with anti-inflammatory drugs but that have no anti-inflammatory effects. An example is paracetamol, called acetaminophen in the U.S. and sold under the brand name of Tylenol. As opposed to NSAIDs, which reduce pain and inflammation by inhibiting COX enzymes, paracetamol has recently been shown to block the reuptake of endocannabinoids, which only reduces pain, likely explaining why it has minimal effect on inflammation.
Long-term use of NSAIDs can cause gastric erosions, which can become stomach ulcers and in extreme cases can cause severe haemorrhage, resulting in death. The risk of death as a result of use of NSAIDs is 1 in 12,000 for adults aged 16–45. The risk increases almost twentyfold for those over 75. Other dangers of NSAIDs are exacerbating asthma and causing kidney damage. Apart from aspirin, prescription and over-the-counter NSAIDs also increase the risk of myocardial infarction and stroke.
Immune Selective Anti-Inflammatory Derivatives (ImSAIDs) 
ImSAIDs are a class of peptides being developed by IMULAN BioTherapeutics, LLC, which were discovered to have diverse biological properties, including anti-inflammatory properties. ImSAIDs work by altering the activation and migration of inflammatory cells, which are immune cells responsible for amplifying the inflammatory response. The ImSAIDs represent a new category of anti-inflammatory and are unrelated to steroid hormones or non-steroidal anti-inflammatories.
The ImSAIDs were discovered by scientists evaluating biological properties of the submandibular gland and saliva. Early work in this area demonstrated that the submandibular gland released a host of factors that regulate systemic inflammatory responses and modulate systemic immune and inflammatory reactions. It is now well accepted that the immune, nervous, and endocrine systems communicate and interact to control and modulate inflammation and tissue repair. One of the neuroendocrine pathways, when activated, results in the release of immune-regulating peptides from the submandibular gland upon neuronal stimulation from sympathetic nerves. This pathway or communication is referred to as the cervical sympathetic trunk-submandibular gland (CST-SMG) axis, a regulatory system that plays a role in the systemic control of inflammation.
Early work in identifying factors that played a role in the CST-SMG axis lead to the discovery of a seven amino acid peptide, called the submandibular gland peptide-T. SGP-T was demonstrated to have biological activity and thermoregulatory properties related to endotoxin exposure. SGP-T, an isolate of the submandibular gland, demonstrated its immunoregulatory properties and potential role in modulating the cervical sympathetic trunk-submandibular gland (CST-SMG) axis, and subsequently was shown to play an important role in the control of inflammation.
One SGP-T derivative is a three-amino acid sequence shown to be a potent anti-inflammatory molecule with systemic effects. This three-amino acid peptide is phenylalanine-glutamine-glycine (FEG) and its D-isomeric form (feG) have become the foundation for the ImSAID category. Cellular Effects of feG: The cellular effects of the ImSAIDs are characterized in a number of publications. feG and related peptides are known to modulate leukocyte (white blood cells) activity by influencing cell surface receptors to inhibit excessive activation and tissue infiltration.
One lead ImSAID, the tripeptide FEG (Phe-Glu-Gly) and its D-isomer feG are known to alter leukocyte adhesion involving actions on αMβ2 integrin, and inhibit the binding of CD16b (FCyRIII) antibody to human neutrophils. feG has also been shown to decrease circulating neutrophil and eosinophil accumulation, decrease intracellular oxidative activity, and reduce the expression of CD49d after antigen exposure.
Long term effects 
Anti-inflammatory treatment trials for existing Alzheimer's disease have typically shown little to no effect on halting or reversing the disease. Research and clinical trials continue. Two studies from 2012 and 2013 found regular use of aspirin for over ten years is associated with an increase in the risk of macular degeneration.
Ice treatment 
Applying ice, or even cool water, to a tissue injury has an anti-inflammatory effect and is often suggested as an injury treatment and pain management technique for athletes. One common approach is Rest, Ice, Compression and Elevation. Cool temperatures inhibit local blood circulation, which reduces swelling in the injured tissue.
Health supplements 
In addition to medical drugs, some herbs and health supplements have anti-inflammatory qualities, including devil's claw (Harpagophytum procumbens), hyssop, ginger (Zingiber officinale), turmeric (Curcuma longa), Arnica montana (containing helenalin), and willow bark (containing salicylic acid). Other anti-inflammatory dietary sources include pomegranate (Punica granatum), green tea (Camellia sinensis), cat's claw (Uncaria tometosa and Uncaria guianensis), Indian olibaum (Boswelia serrata), and pineapple bromelain (Ananas comosus). Cannabichromene, a cannabinoid, also has anti-inflammatory effect.  Honokiol inhibits platelet aggregation, and works as an inverse agonist at the CB2 receptor. Black seed (Nigella sativa) has shown anti-inflammatory effect due to its high thymoquinone content. St. John's wort's chief constituent, hyperforin, has been found to be a potent COX-1 and 5-LO inhibitor, with anti-inflammatory effect several fold that of aspirin.
Anti-inflammatory foods 
Prostaglandins are hormone-like substances that affect the body in variety of ways, also regulating inflammatory mediation. An anti-flammatory diet includes less foods that create inflammation-causing prostaglandins (PGE2) in the body, and more foods that create anti-flammatory prostaglandins (PGE1 and PGE3). 
Suggested diets to reduce inflammation include those rich in vegetables and low in simple carbohydrates and fats, such as saturated fats and trans fats. Anti-inflammatory foods include most colorful fruits and vegetables, oily fish (which contain higher levels of omega-3 fatty acids), nuts, seeds, and certain spices, such as ginger. Extra-virgin olive oil contains the chemical oleocanthal that acts similarly to ibuprofen. Those following an anti-inflammatory diet will avoid refined oils and sugars, and show a preference for so-called anti-inflammatory foods in their meal choices.
- Ottani, Alessandra; Leone, Sheila; Sandrini, Maurizio; Ferrari, Anna; Bertolini, Alfio (February 15, 2006). "The analgesic activity of paracetamol is prevented by the blockade of cannabinoid CB1 receptors". European Journal of Pharmacology 531: 280–281. doi:10.1016/j.ejphar.2005.12.015. PMID 16438952.
- Dani, Mélina; Guindon, Josée; Lambert, Chantal; Beaulieu, Pierre (November 14, 2007). "The local antinociceptive effects of paracetamol in neuropathic pain are mediated by cannabinoid receptors". European Journal of Pharmacology 573: 214–215. doi:10.1016/j.ejphar.2007.07.012. PMID 17651722.
- "Table 7". NSAIDs and adverse effects. Bandolier. Retrieved December 20, 2012.
- Trelle, Sven; Reichenbach, Stephan; Wandel, Simon; Hildebrand, Pius; Tschannen, Beatrice; Villiger, Peter M.; Egger, Matthias; Jüni, Peter (11 January 2011). "Cardiovascular safety of non-steroidal anti-inflammatory drugs: network meta-analysis". British Medical Journal (Clinical research ed.) 342: c7086. doi:10.1136/bmj.c7086. PMC 3019238. PMID 21224324.
- Bao, F.; John, S.M.; Chen, Y.; Mathison, R.D.; Weaver, L.C. (2006). "The tripeptide phenylalanine-(d) glutamate-(d) glycine modulates leukocyte infiltration and oxidative damage in rat injured spinal cord". Neuroscience 140 (3): 1011–1022. doi:10.1016/j.neuroscience.2006.02.061. PMID 16581192.
- Mathison, Ronald D.; Befus, A. Dean; Davison, Joseph S.; Woodman, Richard C. (2003). "Modulation of neutrophil function by the tripeptide feG". BMC Immunology 4 (3). doi:10.1186/1471-2172-4-3. PMC 152650. PMID 12659660. Retrieved December 20, 2012.
- Mathison, R.; Davison, J.S.; Befus, A.D. (November 1994). "Neuroendocrine regulation of inflammation and tissue repair by submandibular gland factors". Immunology Today 15 (11): 527–532. doi:10.1016/0167-5699(94)90209-7. PMID 7802923.
- Mathison, Ronald D.; Malkinson, Terrance; Cooper, K.E.; Davison, J.S. (1997). "Submandibular glands: novel structures participating in thermoregulatory responses". Canadian Journal of Physiology and Pharmacology 75 (5): 407–413. doi:10.1139/y97-077. PMID 9250374.
- Dery, R.E.; Mathison, R.; Davison, J.; Befus; A.D. (2001). "Inhibition of allergic inflammation by C-terminal peptides of the prohormone submandibular rat 1 (SMR-1)". International archives of allergy and immunology 124 (1-3): 201–024. doi:10.1159/000053710. PMID 11306968.
- Mathison, Ronald D.; Christie, Emily; Davison, Joseph S. (2008). Journal of Inflammation 5 (6). doi:10.1186/1476-9255-5-6. PMC 2408570. PMID 18492254 http://www.journal-inflammation.com/content/5/1/6
|url=missing title (help). Retrieved December 20, 2012.
- Dery, René E.; Ulanova, Marina; Puttagunta, Lakshmi; Stenton, Grant R.; James, Deborah; Merani, Shaheed; Mathison, Ronald; Davison, Joe; Befus, A. Dean (2004). "Frontline: Inhibition of allergen-induced pulmonary inflammation by the tripeptide feG: a mimetic of a neuro-endocrine pathway". European Journal of Immunology 34 (12): 3315–3325. doi:10.1002/eji.200425461. PMID 15549777. Retrieved December 20, 2012.
- Mathison, Ronald D.; Davison, Joseph S. (2006). "The tripeptide feG regulates the production of intracellular reactive oxygen species by neutrophils". Journal of Inflammation 3 (9). doi:10.1186/1476-9255-3-9. PMC 1534017. PMID 16776845. Retrieved December 20, 2012.
- Mathison, R.; Lo, P.; Tan, D.; Scott, B.; Davison, J. S. (2001). "The tripeptide feG reduces endotoxin-provoked perturbation of intestinal motility and inflammation". Neurogastroenterology & Motility 13 (6): 599–603. doi:10.1046/j.1365-2982.2001.00294.x. PMID 11903921.
- "Anti-inflammatory drugs may not protect cognitive function". Harvard Mental Health Letter 25 (2): 7. August 2008. PMID 18724438.
- Rogers, Joseph (2008). "The Inflammatory Response in Alzheimer's Disease". Journal of Periodontology 79 (8 Supplement): 1535–1543. doi:10.1902/jop.2008.080171. PMID 18673008.
- Sano, M.; Grossman, H.; Van Dyk, K. (2008). "Preventing Alzheimer's disease: separating fact from fiction.". CNS Drugs 22 (11): 887–902. doi:10.2165/00023210-200822110-00001. PMID 18840031.
- Liew, G.; Mitchell, P.; Wong, T. Y.; Rochtchina, E.; Wang, J. J. (2013). "The Association of Aspirin Use with Age-Related Macular Degeneration". JAMA Internal Medicine: 1–7. doi:10.1001/jamainternmed.2013.1583. PMID 23337937.
- Klein, B. E. K.; Howard, K. P.; Gangnon, R. E.; Dreyer, J. O.; Lee, K. E.; Klein, R. (2012). "Long-term Use of Aspirin and Age-Related Macular Degeneration". JAMA: the Journal of the American Medical Association 308 (23): 2469–2478. doi:10.1001/jama.2012.65406. PMID 23288416.
- Akhtar, N.; Haqqi, T. M. (2012). "Current nutraceuticals in the management of osteoarthritis: A review". Therapeutic Advances in Musculoskeletal Disease 4 (3): 181–207. doi:10.1177/1759720X11436238. PMC 3400101. PMID 22850529.
- Turner, Carlton, E.; Elsohly, Mahmoud A. (1981). "Biological activity of cannabichromene, its homologs and isomers". Journal of Clinical Pharmacology 21 (8-9 Supplement): 283S–291S. PMID 7298870. Retrieved December 20, 2012.
- Alemi, M.; Sabouni, F.; Sanjarian, F.; Haghbeen, K.; Ansari, S. (2012). "Anti-inflammatory Effect of Seeds and Callus of Nigella sativa L. Extracts on Mix Glial Cells with Regard to Their Thymoquinone Content". AAPS PharmSciTech. doi:10.1208/s12249-012-9899-8. PMID 23255199.
- "Inflammation". Southern California College of Optometry. Retrieved 29 January 2013.
- "Dr. Weil’s Anti-Inflammatory Food Pyramid". Dr Weil. Retrieved December 20, 2012.
- "List of 63 Anti-Inflammatory Foods to Choose from for Natural Healing". The Natural Anti-Inflammatory Remedies. Retrieved December 20, 2012.
- Hyman, Mark (2006). Ultrametabolism: The Simple Plan for Automatic Weight Loss. New York, New York: Simon and Schuster. p. 137. ISBN 9781416531821. Retrieved December 20, 2012.
- Willyard, Cassandra (September 2, 2010). "How Fish Oil Fights Inflammation". ScienceNOW. Retrieved December 20, 2012.