ARBs review
Statins
Serotonin syndrome
100
What receptor do ARBs block?
Angiotensin II
100
This is what a statin medication does.
What is a medication used to lower LDL cholesterol?
100
In serotonin syndrome, increased serotonergic activity produces the classic triad of mental status changes, autonomic hyperactivity, and neuromuscular abnormalities through this underlying mechanism.
What is excess serotonin accumulation in the synaptic cleft causing overstimulation of serotonin receptors?
200
What affect do ARBs have on reabsorption in the kidney?
decrease sodium reabsorption and increase potassium reabsorption
200
This is the enzyme that statins block.
What is HMG-CoA reductase?
200
This common class of antidepressants can contribute to serotonin syndrome by blocking serotonin reuptake, increasing serotonin within the synaptic cleft.
What are selective serotonin reuptake inhibitors (SSRIs)?
300
Name 3 conditions that you could use ARBs for
Hypertension, CKD, heart failure
300
These are examples of statin medications.
What are atorvastatin, simvastatin, and lovastatin?
300
When serotonin accumulates in the synaptic cleft, it produces mental status changes, autonomic hyperactivity, and neuromuscular abnormalities by causing excessive activation of these receptors.
What are serotonin (5-HT) receptors?
400
The lcoation of ARBs vs ACE inhibitors (diagram)
What is
400
What downstream enzyme which impairs the mitochondrial ETC is depleted as a result of statin use?
Statins block block HMG-CoA reductase, which not only lowers cholesterol but also stops the production of isoprenoids and Coenzyme Q10. This causes an energy deficit (ATP shortage) and oxidative stress in muscle.
400
This physical exam finding is especially characteristic of serotonin syndrome and helps distinguish it from neuroleptic malignant syndrome.
What is clonus?
500
Common examples of ARBs
and bonus examples of ACE inhibitors
500
How can statins generate harmful reactive oxygen species (ROS) and what can this produce in patients?
Statins can bind directly to the ryanodine receptor 1 (RyR1) on the sarcoplasmic reticulum, forcing calcium channels to leak.
Excess calcium inside the muscle cell triggers destructive protein-breaking enzymes (proteases) and generates harmful reactive oxygen species
This oxidative stress damages cell membranes and can ultimately lead to muscle cell death (rhabdomyolysis in severe cases).
NOTE: Impaired calcium signaling ≠ decreased calcium leakage.
500
Serotonin syndrome typically develops within this general time frame after starting or increasing a serotonergic medication.
Within hours / usually <24 hours