Drug Name Propranolol

The resultant stimulation of cardiac ?-adrenoceptors elicits an increase in both heart rate and force of systolic contraction, which, in conjunction with an ?-adrenoceptor- mediated increase in peripheral resistance, leads to a compensatory rise in blood pressure.
In concert with the protein calmodulin, Ca2+ can activate myosin kinase, leading to a rise in tonus via phosphorylation of the contractile protein myosin. cAMP inhibits activation of myosin kinase.

 

Moreover, cutaneous, hematological, and hepatic changes may necessitate a change in medication. Phenobarbital, primidone, and phenytoin may lead to osteomalacia (vitamin D prophylaxis) or megaloblastic anemia (folate prophylaxis). During treatment with phenytoin, gingival hyperplasia may develop in ca. 20% of patients.
The same process is repeated when the drug penetrates the axonal membrane (axolemma) into the axoplasm, from which it exerts its action on the sodium channel, and again when it diffuses out of the endoneural space through the unfenestrated endothelium of capillaries into the blood.