|Trade names||Ketas, Pinatos, Eyevinal|
|AHFS/Drugs.com||International Drug Names|
|By mouth (capsules),
topical (ophthalmic solution)
|Chemical and physical data|
|Molar mass||230.31 g/mol|
|3D model (Jmol)|
|(what is this?)|
Ibudilast (development codes: AV-411 or MN-166) is an anti-inflammatory drug used mainly in Japan, which acts as a phosphodiesterase inhibitor, inhibiting the PDE4 subtype to the greatest extent, but also showing significant inhibition of other PDE subtypes.
Ibudilast has bronchodilator, vasodilator and neuroprotective effects, and is mainly used in the treatment of asthma and stroke. It inhibits platelet aggregation, and may also be useful in the treatment of multiple sclerosis.
Ibudilast crosses the blood–brain barrier and suppresses glial cell activation. This activity has been shown to make ibudilast useful in the treatment of neuropathic pain and it not only enhances analgesia produced by opioid drugs, but also reduces the development of tolerance.
Ibudilast is listed as being an antagonist at the toll-like receptor 4 (TLR4). This likely play an immense part in its effect, specifically its synergy with opioid drugs, its anti-inflammatory effect, and its own painkilling effect. It is unknown if the PDE4-inhibiting properties potentiate the effects of TLR4 inactivation and/or vice versa, despite that some of their effects are shared, such as inflammation reducing properties.
In Japan, ibudilast oral capsules are approved for the treatment of asthma, and for improvement of dizziness secondary to chronic cerebral circulation impairment associated with sequelae of cerebral infarction. Ibudilast ophthalmic solution is indicated for the treatment of allergic conjunctivitis and hay fever.
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- Suzumura A, Ito A, Yoshikawa M, Sawada M. Ibudilast suppresses TNFalpha production by glial cells functioning mainly as type III phosphodiesterase inhibitor in the CNS. Brain Research. 1999 Aug 7;837(1-2):203-12.
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- Mizuno T, Kurotani T, Komatsu Y, Kawanokuchi J, Kato H, Mitsuma N, Jacob Linder, Suzumura A. Neuroprotective role of phosphodiesterase inhibitor ibudilast on neuronal cell death induced by activated microglia. Neuropharmacology. 2004 Mar;46(3):404-11.
- Yoshioka M, Suda N, Mori K, Ueno K, Itoh Y, Togashi H, Matsumoto M. Effects of ibudilast on hippocampal long-term potentiation and passive avoidance responses in rats with transient cerebral ischemia. Pharmacological Research. 2002 Apr;45(4):305-11.
- Wakita H, Tomimoto H, Akiguchi I, Lin JX, Ihara M, Ohtani R, Shibata M. Ibudilast, a phosphodiesterase inhibitor, protects against white matter damage under chronic cerebral hypoperfusion in the rat. Brain Research. 2003 Nov 28;992(1):53-9.
- Rile G, Yatomi Y, Qi R, Satoh K, Ozaki Y. Potentiation of ibudilast inhibition of platelet aggregation in the presence of endothelial cells. Thrombosis Research. 2001 May 1;102(3):239-46.
- Feng J, Misu T, Fujihara K, Sakoda S, Nakatsuji Y, Fukaura H, Kikuchi S, Tashiro K, Suzumura A, Ishii N, Sugamura K, Nakashima I, Itoyama Y. Ibudilast, a nonselective phosphodiesterase inhibitor, regulates Th1/Th2 balance and NKT cell subset in multiple sclerosis. Multiple Sclerosis. 2004 Oct;10(5):494-8.
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- "Ketas (ibudilast) Capsules 10 mg. Prescribing Information" (PDF). Kyorin Pharmaceutical Co., Ltd. Retrieved 3 October 2016.
- "Ketas (ibudilast) Eye Drops 0.01% Kisuri-no-Shiori (Drug Information Sheet)". Senju Pharmaceutical Co., Ltd. Retrieved 3 October 2016.