Pharmacology - ​Salbutamol

Pharmacology - ​Salbutamol
Action 
Stimulates bronchodilation. (The heart beats faster and with more force, although the action is minimal). It relaxes the smooth muscle of the uterus.

Mode of Action 
Calcium-mediated contraction in the bronchioles is reduced at this time. The activation of protein kinase A (PKA) is caused by an increase in cAMP. The myosin light chain kinase (MLCK) enzyme, which is the mediator of contraction, is inhibited by PKA.

Absorption, distribution, and elimination 
Asthma treatment using inhalation: Short-acting salbutamol, which can be administered intravenously, has a duration of three to five hours.
 long-acting Salmeterol duration of 8–12 hours. Ritodrine infusion for the treatment of preterm labor.
The majority of them were excreted in unchanged.

Use in clinical settings
 Asthma is the primary usage. The acute attack is treated with salbutamol and terbutaline, whereas salmeterol is prescribed for nocturnal asthma, exercise-induced asthma, and long-term therapy respectively.
the use of salbutamol, terbutaline, or salmeterol for the treatment of chronic obstructive pulmonary disease (COPD)

Adverse effects 
Some peripheral dilation, tremors, tachycardia, and occasionally dysrhythmias are also present. Nervousness is also present.


Extra credit points 
In the presence of an MAO inhibitor, hypertensive crises may occur. Additionally, MAOIs increase the effects of CNS stimulants.