A spasm is a sudden involuntary contraction of a muscle, a group of muscles, or a hollow organ such as the bladder. A spasmodic muscle contraction may be caused by many medical conditions, including dystonia. Most commonly, it is a muscle cramp which is accompanied by a sudden burst of pain. A muscle cramp is usually harmless and ceases after a few minutes. It is typically caused by ion imbalance or muscle overload. There are other causes of involuntary muscle contractions, and some of these may cause a health problem. Description and causes
Various kinds of involuntary muscle activity may be referred to as a "spasm". A spasm may be a muscle contraction caused by abnormal nerve stimulation or by abnormal activity of the muscle itself. A spasm may lead to muscle strains or tears in tendons and ligaments if the force of the spasm exceeds the tensile strength of the underlying connective tissue. This can occur with a particularly strong spasm or with weakened connective tissue. A hypertonic muscle spasm is a condition of chronic, excessive muscle tone (i.e., tension in a resting muscle). This is the amount of contraction that remains when a muscle is not working. A true hypertonic spasm is caused by malfunctioning feedback nerves. This is much more serious and is permanent unless treated. In this case, the hypertonic muscle tone is excessive, and the muscles are unable to relax. A subtype of spasm is colic.
Based on its mechanism of action, treatment with may pose a risk to reproductive capacity. Pharmacology
Faricimab is a 150kDa-sized bispecific antibody whose molecular structure allows a high affinity bond to both vascular endothelial growth factor A (VEGF-A) and Angiopoietin (Ang-2). By blocking the action of these two growth factors, faricimab decreases migration and replication of endothelial cells allowing for stabilization of vascular structures, thereby decreasing vascular leakage. Faricimab has shown improved and sustained efficacy in comparison to agents that only target the VEGF pathway. History
In 2016, pre-clinical studies looking at the mechanism of action behind faricimab showed that by blocking Ang-2, one of the drugs targets, there was decreased endothelial barrier breakdown in blood vessels. In 2017, phase I studies in neovascular age related macular degeneration (nAMD) showed that the drug was safe to use in people and well tolerated. Society and culture
Legal status
On 21 July 2022, the Committee for Medicinal Products for Human Use (CHMP) of the European Medicines Agency (EMA) adopted a positive opinion, recommending the granting of a marketing authorization for the medicinal product Vabysmo, intended for the treatment of neovascular age-related macular degeneration (nAMD) and diabetic macular oedema (DME). The applicant for this medicinal product is Roche Registration GmbH. Faricimab was approved for medical use in the European Union in September 2022. Names
Faricimab is the International Nonproprietary Name (INN). Faricimab was formerly named RG7716.