Skip to main content

BOTULINUM TOXIN Uses, Side Effects, and More

 BOTULINUM TOXIN ( A or B )


BRAND NAME:- BOTOX ,DYSPORT 


BOTULINUM TOXIN  A and B are highly potent exotoxins produced by Clostridium botulinum that are responsible for ' botulism' ( a type of food poisoning). These neurotoxic proteins cause long- lasting loss of cholinergic transmission by interacting with axonal proteins involved in exocytotic release of Ach. Localized injection of minute quantity of botulinum toxin. 

PHARMACODYNAMIC:-


Botulinum toxin A inhibits the release of acetylcholine, relieving muscle contraction and spasm associated with many conditions, such as incontinence and dystonia. Cosmetically, botulinum toxin A paralyses muscles in the face to temporarily treat wrinkles. The maximum effects of muscle paralysis occur four to seven days after a dose.When injected at therapeutic doses, botulinum toxin A causes partial chemical denervation of muscle tissue, causing local reduction of muscle activity. Muscle atrophy may result, axonal sprouting may begin, and extra junctional acetylcholine receptors can be formed. Reinnervation of the muscle may occur, reversing muscle denervation caused by botulinum toxin 

MECHANISM OF ACTION:-

Botulinum toxin is a 150-kDa molecular weight protein consisting of a light chain (50 kDa) and heavy chain (100 kDa) linked by a single disulfide bond. The crystal structure reveals 3 lobes - the light chain, the amino-terminal portion of the heavy chain, and the carboxyl-terminal portion of the heavy chain.

Botulinum toxin type A blocks neuromuscular transmission on motor or sympathetic nerve terminals, inhibiting the release of acetylcholine.Botulinum toxins have actions on various regions: the neuromuscular junction, autonomic ganglia, and both postganglionic sympathetic and parasympathetic nerve endings. The heavy chain of the toxin binds selectively at the presynaptic surface of cholinergic neurons in an irreversible fashion. After binding, the toxin-receptor complex is transported into the cell by endocytosis. The disulfide bond between the two chains is cleaved and the botulism toxin enters the cytoplasm. The light chain specifically interacts with SNAP-25 in the nerve terminals to block binding of acetylcholine vesicles with the cell membrane. SNAP-25 is required for successful binding and release of acetylcholine from vesicles in nerve endings

USED:-

Used in the treatment of a number of spastic and other neurological conditions due to overactivity of cholinergic nerves, like blepharospasm, spastic cerebral palsy,strabismus, spasmodic torticollis, nystagmus, hemifacial  spasm, post stroke spasticity , spasmodic dysphonia, axillary hyper hydroscis ,etc. 
Use as beauty treatment by removable of age - related facial wrinkles.


SIDE EFFECTS:-


Serious adverse effects after cosmetic use of botulinum toxin include dysphagia, muscle weakness, and allergic reactions [22, 23]. Dysphagia and muscle weakness are common symptoms of botulism. 


DOSE:- DIRECT BY PHYSICIAN 




Labels:

Comments

Post a Comment

Popular posts from this blog

Cefpodoxime proxetil Uses, Side Effects, and More

 Cefpodoxime proxetil Brand name:- cefoprox ,cepodem,DOXCEF 100,200mg cap.  Cefpodoxime Proxetil is an antibiotic. It kills the bacteria by preventing them from forming the bacterial protective covering (cell wall) which is needed for them to survive. Pharmacodynamic:-  Cefpodoxime is shown to be effective against most Gram positive and Gram negative bacteria, except Pseudomonas aeruginosa, Enterococcus, and Bacteroides fragilis. Mechanism of action:-  Cefpodoxime is active against a wide spectrum of Gram-positive and Gram-negative bacteria. Cefpodoxime is stable in the presence of beta-lactamase enzymes. As a result, many organisms resistant to penicillins and cephalosporins, due to their production of beta-lactamase, may be susceptible to cefpodoxime. Cefpodoxime is inactivated by certain extended spectrum beta-lactamases. The bactericidal activity of cefpodoxime results from its inhibition of cell wall synthesis. The active metabolite of cefpodoxime binds preferentially to penicilli
Post a Comment
Read more

Cephalexin ( ZYD ) ( Cefalexin ) Uses, Side Effects, and More

 Cephalexin (ZYD) (Cefalexin) Brand name:-  Cephacillin 250,500mg cap; Sporidex, Alcephin,Cephaxin cap. Cephalexin (also called Cefalexin)  is the most common used orally effective first generation cephalosporin , similar in spectrum to cefazolin , but less active against penicillinase producing staphylococci and H. Influenza. Plasma protein binding is low; it attains High concentration in bile and is excreted unchanged in urine; t½ - 60min. Pharmacodynamic:-  Cephalexin (also called Cefalexin) is a first generation cephalosporin antibiotic. It is one of the most widely prescribed antibiotics, often used for the treatment of superficial infections that result as complications of minor wounds or lacerations.Label It is effective against most gram-positive bacteria through its inihibition of the cross linking reaction between N-acetyl muramicacid and N-acetylglucosamine in the cell wall, leading to cell lysis. Pharmacokinetics:- Cephalexin is rapidly and almost completely absorbed from t
Post a Comment
Read more

BASILIXIMAB Uses, Side Effects, and More

 BASILIXIMAB BRAND NAME:- Simulect   BASILIXIMAB is another anti CD - 25 antibody with higher affinity for the IL-2 receptor, but shorter plasma t½ (1 week) . is a monoclonal antibody used to prevent rejection in kidney transplants. It is a chimeric mouse-human monoclonal antibody to the α chain (CD25) of the IL-2 receptor of T cells. It is used in combination with other medicines used to prevent organ rejection. PHARMACODYNAMIC:- Basiliximab functions as an IL-2 receptor antagonist. Specifically it inhibits IL-2-mediated activation of lymphocytes, a critical pathway in the cellular immune response involved in allograft rejection.  MECHANISM OF ACTION:-  Basiliximab competes with IL-2 to bind to the alpha chain subunit of the IL2 receptor on the surface of the activated T lymphocytes and thus prevents the receptor from signaling. This prevents T cells from replicating and also from activating B cells, which are responsible for the production of antibodies, which would bind to the trans
1 comment
Read more