Lenvatinib is a prescription medicine that belongs to a group of medicines called kinase inhibitors. Lenvatinib 4 mg and 10 mg contain the same active ingredient, lenvatinib; the strength determines how much medicine is contained in each capsule. The appropriate dose depends on the condition being treated and the prescribing clinician’s instructions.
How Lenvatinib Works in the Body
Lenvatinib works by blocking several receptor tyrosine kinases involved in processes that can support tumor growth and the formation of new blood vessels. In particular, it inhibits VEGFR1, VEGFR2, and VEGFR3, which are involved in blood-vessel formation. It also affects FGFR1–4, PDGFRα, KIT, and RET, signaling proteins associated with cell growth and other cellular processes.
Blocking Signals That Support Tumor Growth
Some tumors rely on signaling pathways that promote blood-vessel development and continued cell activity. By interfering with several of these pathways at the same time, lenvatinib can reduce signaling associated with angiogenesis and tumor progression. Its activity against multiple kinase targets is an important part of its mechanism.
Why 4 mg and 10 mg Strengths Exist
Lenvatinib is available in several capsule strengths, including 4 mg and 10 mg. These strengths can be used as part of prescribed dosing or dose adjustments, depending on the specific treatment plan. The correct strength should always be determined by the prescribing clinician rather than selected independently.