Learning Objectives Focused Flashcards
What is the MOA of the Vitamin K Antagonist Coumadin [Warfarin]?
Inhibits Vitamin K dependent coagulation factor synthesis
What is the MOA of the Coagulation Factor Antagonist Enoxaparin [Lovenox]?
Irreversibly inactivates clotting factor-Xa much more-so than Factor-IIa (thrombin)
It is LMW heparin extract making it more predictable than normal heparin
What is the MOA of the Coagulation Factor Antagonist Rivaroxaban [Xarelto]?
Factor-Xa inhibitor (converts prothrombin to thrombin
Selectively blocks the active site of Factor-Xa, inhibiting blood coagulation.
What is the MOA of the Platelet Inhibitor Clopidogrel [Plavix]?
Irreversible inhibition of platelet ADP receptors which normally trigger platelet activation and aggregation via downstream activation of GIIIb/IIa
What is the MOA of the GPIIIa/IIb receptor antagonist Abciximab [ReoPro]?
Fab fragment binds to GPIIIb/IIa receptor of human platelets and inhibits platelet aggregation
Binds to vitronectin receptor on platelets and vessels wall endothelial and smooth muscle cells
Specify normal/abnormal total cholesterol.
Desirable - 200
Specify normal/abnormal LDL cholesterol.
Desirable - 130
Specify normal/abnormal HDL cholesterol.
Desirable - >60
Which two statins produce the greatest serum LDL cholesterol reduction?
Atorvastin and Rosuvastatin (50%)
Which statin produces the greatest triacylglycerol reduction?
Atorvastatin (29%)
Which two statins produce the greatest HDL cholesterol increase?
Pravastatin and Simvastatin (12%)
Which two statins have the ability to penetrate the CNS?
Lovastatin and Simvastatin
What is the MOA of the HMG-CoA Reductase Inhibitor Atorvstastin [Lipitor]?
Competitively inhibits HMG-CoA Reductase which is responsible for an early, rate limiting step in cholesterol biosynthesis
Increases hepatic LDL receptors, enhancing catabolism
What are the common adverse effects of Atorvstastin?
nasopharyngitis, myalgia, myopathy impaired function associated w/ elevated serum transaminase levels (jaundice), amnesia
What are the ocular adverse effects of Atorvstastin?
Diplopia, ptosis, pseudo-CME & blurred vision, elevated IOP, intraocular hemorrhage, cataracts
What happens when you take cyclosporine, erythromycin or azalea antifungals with Atorvastatin? (unique)
Myopathy exacerbation (a common adverse effect of Atorvastatin)
What is the contraindication of Atorvastatin?
Azole Antifungals
When is Fenofibrate commonly prescribed?
In conjunction with statins or in statin resistant patients
What is the MOA of the Fibrate Fenofibrate [TriCor]?
Stimulates nuclear receptor PPAR which modulates transcription of insulin (get’s energy into our cells) sensitive genes in live, muscle and adipose tissue (release of lipids into the bloodstream)
Enhances HDL production; inhibits triglyceride synthesis and stimulates catabolism of triglyceride-rich lipoproteins
Greatest effect on cells that reproduce the fastest
What are the common adverse effects of Fenofibrate?
headache, rhinitis, flu syndrome
What are the serious adverse effects of Fenofibrate?
SJS, TEN (toxic epidermal necrolysis), hepatitis, cirrhosis, thromboembolism, myositis, myopathy, rhabdomyolysis
What are the drug interactions of Fenofibrate?
Acyclovir, aminoglycoside, cyclosporine, gancyclovir - impaired renal elimination
Impaired metabolism of Sulfonylureas (Diabetes med)
What is Niacin commonly known as?
OTC Vitamin B3
What is the MOA of Niacin?
Inhibits lipolysis in adipose tissue, resulting in reduced hepatic VLDL synthesis and production of LDLs in plasma
What are the common adverse effects of Niacin?
headache, pseudo CME (goes away if you stop taking), flushing, pruritus, hyper pigmentation, jaundice, xeroderma, orthostatic hypotension
What is the unique ocular adverse effect of Niacin?
Toxic Amblyopia (the only one that does this)
What are the serious adverse effects of Niacin?
Hepatotoxicity, arrythmias
What are the drug interactions of Niacin?
Alpha and Beta Blockers - additive effect
What are the cautions to consider when thinking of using Niacin?
Diabetes (elevated blood sugar), sugar (anti-platelet effect)
What is the MOA of the Cholesterol Absorption Inhibitor Ezetimibe [Zetia]?
Inhibits dietary and biliary cholesterol absorption at small intestinal brush border
Used in conjunction with statins (inhibit cholesterol function, while these inhibit absorption)
What are the common adverse effects of Ezetimibe?
sinusitis, influenza, diarrhea
What are the serious adverse effects of Ezetimibe?
angioedema, anaphylaxis, hepatitis (need a healthy liver to lower lipid levels), thrombocytopenia
What is the effect of taking Cyclosporine and Ezetimibe?
May increase levels of both drugs as they are both processed through the liver
What are the cautions when taking Ezetimibe?
Hepatic Impairment
By what factor can you multiply A1C by to get your eAG?
Between 21 and 24
Ex. 6 * 21 = 126
Ex. 10 * 24 = 240
These values correspond to the table provided
Why is Metformin the first line drug for DM-2 treatment?
High efficacy, low hypoglycemia risk, has neutral/loss of weight, low cost
What are the main second line DM-2 drugs and why?
DPP-4 Inhibitors and GLP-1 Receptor Agonists
Because they have similar effects (most importantly weight effects) to Metformin although they are more expensive
For DM-2 when do we decide to use Insulin?
When Metformin does not work by itself, in a 2 drug combo or a 3 drug combo. This is the most complex of insulin strategies.
What is the average age of onset/diagnosis for DM-1?
Childhood or puberty
What is the average age of onset/diagnosis for LADA?
Adults
What is the average age of onset/diagnosis for DM-2?
Commonly >35 years of age
What is the average age of onset/diagnosis for MODY?
20 - 60 years of age
What is the MOA of the Biguanide Metformin [Glucophage]?
Biguanide based; activates AMP-activated protein kinase (AMPK) which in turn suppresses hepatic gluconeogenesis & intestinal glucose absorption; increases insulin sensitivity
Essentially is helps cells respond better to insulin
What are the common adverse effects of Metformin?
Headache, metallic taste, rash
What are the serious adverse effects of Metformin?
Lactic Acidosis (CO in bloodstream = toxic), Megaloblastic anemia (reduced oxygen transport to eye)
What are the main drug interactions of all Diabetes drugs?
Fish Oils, Decongestants, Steroids - antagonistic (increase blood sugar)
Flaxseed Oil - Additive
Beta-Blockers - Mask Hypoglycemia
NSAIDs - prolonged effect
Which drugs when taken with Metformin cause induced lactic acidosis?
Aminoglycosides, amphotericin, ganciclovir, acyclovir due to nephrotoxicity
What is the MOA of the Sulfonylurea Glipizide [Glucotrol]?
It is a Sulfonylurea which stimulates pancreatic islet beta cell insulin release through a Ca++ dependent pathway
What are the common adverse effects of Glipizide?
headache, photosensitivity, hypoglycemia
What are the serious adverse effects of Glipizide?
Death due to cardiovascular complications
What is the MOA of Thiazolidinedione/TZD/Glitazone Pioglitazone [Actos]?
Insulin sensitizer selectivity stimulates nuclear receptor PPAR which increases insulin sensitivity in the liver, skeletal muscle and adipose tissue
What are some additional effects that can happen when messing with the PPAR pathway?
Increasing sensitization of insulin, creation of ROS, and creation of substances integral in inflammation