Term
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Definition
The deposition of Monosodium Urate crystals in joints and tissues |
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Term
What causes an accumulation of urate? |
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Definition
1. Disorder of purine metabolism that causes an overproduction
2. Disorder of urate elimination that causes an underexcretion |
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Term
What is the most important risk factor for Gout? |
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Definition
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Term
List 3 sources of purines that cause the production of uric acid. |
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Definition
1. Diet
2. De Novo
3. Tissue Turnover |
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Term
What types of foods can cause Gout? |
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Definition
1. Meats, especially organs
2. Seafood
3. Coffee
4. EtOH |
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Term
At what [M+] does Urate saturate in the plasma? |
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Definition
7.0 mg/dL
**You want below this amount to avoid gout** |
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Term
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Definition
In peripheral Tissues
Joints
Cartilage, tendons, ligaments |
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Term
Why is pain associated with Gout? |
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Definition
The long needle shaped crystals get ingested by macrophages. They then lyse and create a local and systemic inflammatory response. This causes more macrophages to ingest. |
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Term
Risk factors (RF) for Gout can be modifiable and nonmodifiable. What are some nonmodifiable RF? |
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Definition
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Term
T/F: Tom a 65 yro male is less likely to develop Gout then Ann a 50 yro woman. |
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Definition
False
Old> young
Male >female |
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Term
Why is the incidence for Gout roughly the same for both men and women after the age of 65? |
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Definition
Pre-menopausal women have estrogren that provides protection against gout. As women age there estrogen levels decrease and eventually go thru menopause and they lose that protection. |
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Term
List some Modifiable RF for Gout. |
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Definition
1. Diet
2. Serum Uric Acid
3. EtOH intake
4. Rx
5. HT 6. Renal disease
7. Transplantation
8. Obesity
9. Metabolic Syndrome |
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Term
Which food product actually decreases the risk of Gout by 44%? |
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Definition
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Term
T/F: Both Beer and wine increase the risk of Gout. |
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Definition
False; wine does not increase it |
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Term
Can you treat Gout with diet modification alone? |
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Definition
No, even with a low purine food diet the best results you can obtain is a decrease in Urate by 1 mg/dL. You need Rx.
Also adherence to this diet is very low! |
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Term
Which drugs cause a decrease in Uric acid elimination thus leading to hyperuremia? |
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Definition
1. Loop and Thiazide diuretics
2. Nicotinic Acid
3. Salicylates under 2G/day (low doses)
4. Ethyl Alcohol
5. Cyclosporines |
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Term
List the 4 stages of Gout |
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Definition
1. Asymptomatic Hyperuricemia
2. Acute/recurrent Gout
3. Intercritical Gout
4. Chronic Tophaceous Gout |
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Term
Asymptomatic Hyperuricemia is (more/less) __________ common than Gout. |
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Definition
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Term
Asymptomatic HU has an elvated level of urate w/out complications. If there are no symptoms when and why do you treat? |
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Definition
1. When UA > 10 mg/dL there is a > 50% chance of getting gout
2. When UA excretion is > 1100 mg/day there is a > 50% chance of nephropathy |
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Term
How does Acute/Recuurent Gout present itself? |
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Definition
1. Acute inflammation to a single joint
2. Fever
3. Intense pain
4. Erythema
5. Warmth and Swelling of joint
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Term
Where area does Acute Gout most often affect? |
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Definition
The 1st Metatarsaphalangeal (MTP) = big toe
can also effect the instep, ankeles, heels, knees, wrists, fingers and elbows |
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Term
Why is Chronic Tophaceous Gout rare? |
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Definition
It is a long term complication of Gout. A person would have had to of had gout that was untreated for more than 10 yrs. |
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Term
Define Tophi and where are classic tophi located? |
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Definition
Deposits of Urate Crystals in soft tissue
Classic Tophus is in helix of ear |
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Term
What are some complications of Chronic Gout? |
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Definition
1. Soft Tissue Damage
2. Deformity
3. Joint Destruction
4. Nerve compression syndromes like Carpel Tunnel Syndrome |
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Term
What is the best and definitve diagnosis for Gout? |
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Definition
Confirming and isolating Urate Crystals in the affected joints by Arthrocentesis |
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Term
T/F: You can only have Gout if you have high amount of Serum Uric Acid. |
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Definition
False; you can have a normal SUA and still have Gout |
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Term
What are the goals of therapy for Gout? |
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Definition
1. Terminate acute attack
2. Minimize risk of future attacks
3. prevent/reverse complications associated w/chronic crystal deposition
4. Prevent/reverse associated conditions like obesity, HT |
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Term
With an Acute Gouty Attack what is the Drug of Choice? |
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Definition
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Term
When should you take a NSAID if you have an Acute Gouty attack? |
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Definition
The sooner you take it after the attack the earlier your symptoms resolve. Efficacy dependent on When not Which. |
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Term
When should a patient with Acute Gout see relief after taking an NSAID? |
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Definition
Should get symptomatic relieft within 24 hrs.
Complete resolution in >90% of people within 5-8 days. |
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Term
What are some adverse effects in using an NSAID for Acute Gout? |
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Definition
1. GI ( bleeding, gastritis)
2. Renal (decreases CrCL, necrosis) 3. CV (increasing BP and fluid retention)
4. CNS (dizzy, headache, decrease cognition) |
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Term
Which patients should not use an NSAID if they have Acute Gout attack? |
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Definition
People with the following:
1. PUD 2. Uncontrolled HT
3. Renal insufficiency
4. CAD
5. Those on anticoagulants |
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Term
What is the MOA of Colchicine for treating Acute Gouty Arthritis? |
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Definition
It inhibits neutrophil migrations, thereby interfering with the inflammatory response to MSU. |
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Term
What is the appropriate dose for Colchicine in treating Acute Gout? |
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Definition
1.2 mg at onset of attack followed by 0.6 mg 1 hr later.
The max dose is 1.8 mg |
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Term
Which dosage form of Colchicine is worse and why? |
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Definition
IV!
Can lead to alopecia, bone marrow suppression, Acute renal failure, liver failure, seizures, DEATH. |
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Term
T/F: It is better to treat Acute Gouty Arthritis with IV Colchine because it will work faster. |
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Definition
False;
You dont want to use an IV can lead to DEATH and other complications |
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Term
What happens to the efficacy of Colchicine with time? |
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Definition
It deteriorates if treatment was not started < 48 hrs |
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Term
When should a patient use Colchine for Acute Gout? |
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Definition
When they are unable to take an NSAID |
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Term
List some adverse effects with the use of Colchicine. |
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Definition
1. GI (80% of peeps)
2. Bone Marrow Suppression
3. Motor problems
4. Toxicities |
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Term
When should Corticosteriods be given in order to treat Acute Gout attacks? |
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Definition
Reserved for polyarticular attacks in patients that do not tolerate NSAIDs or Colchicine. |
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Term
What are some Adverse effects associated with CS? |
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Definition
Fluid Retention
Weight gain
Impaired wound healing
Psychosis
HPA Suppression
Osteoporosis
Immunosuppression |
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Term
T/F: CS rebound gouty flares. |
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Definition
True;
this is why we taper over 7-10 days |
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Term
What is a nonpharmacological Tx for Acute Gouty Arthritis? |
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Definition
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Term
Why is the Big Toe mostly affected with Acute Gout? |
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Definition
It has a lower temperature so it changes the solubility of Uric Acid to saturate and crystallize at lower levels of UA. |
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Term
T/F: ACTH is more effective in patients who are on chronic CS. |
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Definition
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Term
What type of Drug interactions does Colchicine have? |
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Definition
With Erythromycin, Cyclosporins and Statins |
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Term
Patients with Acute Gouty Arthritis and renal insufficiency should take what types of Rx? |
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Definition
Intra-Articular or Systemic CS
ACTH is available
Caution w/use of Colchicine |
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Term
T/F: Starting a Urate Lowering Therapy during an Acute Gout attack is best for the patient. |
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Definition
False; will make things worse |
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Term
Why is Intercritical Gout Prophylaxis administed? |
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Definition
To reduce the frequency of recurrent attacks |
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Term
When do you use Prophylaxis for Intercritical Gout? |
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Definition
1. 1-3 months before starting an Urate Lowering Therapy
2. If you have 2-3 attacks/yr or 1 severe attack
3. Serum Urate > 10 mg/dL
4. 24 hr Urate excretion > 1000 mg
5. If has complicated urate nephrolithiasis |
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Term
When can you stop prophylaxis for Intercritical Gout? |
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Definition
When they have been attack for 1-2 yrs and there SUA is normal. |
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Term
What Rx can be used for Intercritical Gout Prophylaxis? |
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Definition
1. Low dose Colchicine
2. Low dose NSAIDs |
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Term
What is the max dose of Chochicine if you have a CrCL btwn 35-49 ml/min? |
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Definition
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Term
If the CrCL was btwn 10-34 ml/min what is the dosing of Colchicine? |
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Definition
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Term
When should you start someone on a Urate Lowering Therapy? |
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Definition
1. 3 or more attacks/yr
2. Urate is always > 11mg/dL
3. Radiographic changes
4. Tophaceous deposits |
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Term
When are you considered an underexcretor of UA? |
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Definition
With a 24 hr urine sample of UA < 600 |
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Term
When are you considered an Overproducer of UA? |
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Definition
With a 24 hr Urine sample of UA > 600 |
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Term
_________________ acccounts for 90 % of cases whereas ___________accounts for the other 10%. |
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Definition
Underexcretors
Overproducers |
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Term
How does Allopurinol work in lowering Urate levels? |
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Definition
It inhibits the enyzme that is responsible for urate synthesis = Xanthine Oxidase Inhibitor |
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Term
How much of a decrease will you expect to see in a patient taking Allopurinal? |
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Definition
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Term
What is the dosing for Allopurinol? |
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Definition
You want to start at 100 mg and increase every 1-4 weeks until the SUA is normal/reached its goal. |
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Term
What is the typical dose for Allopurinol? |
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Definition
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Term
With decreasing renal function what do you want to do to the dosing of Allopurinol? |
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Definition
Decrease the dose.
CrCL of 60-90 mg/dl = 200 mg
CrCL of 30-59 mg/dl = 100
CrCL of < 30 mg/dl = 50-100 mg |
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Term
What are some adverse effects you need to counsel a patient who is taking Allopurinol? |
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Definition
1. Pruritis and mild rash (skin rxn)
2. Rare, severe, dose dependent hypersensitivity
that can cause liver/kidney failure, death, fever |
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Term
Allopurinol has drug interactions with which drugs? |
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Definition
1. Low dose ASA
2. Warfarin
3. Mercatopurine
4. Ampicillin
5. Thiazide Diuretics
6. Azathioprine
7. Theophylline |
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Term
Which drug was approved last year and lowers the serum urate by 1/2 (more than Allopurinol)? |
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Definition
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Term
How do you dose Febuxostat? |
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Definition
Take 40 mg Every day
Can increase to 80 mg after 2 weeks if the SUA is still > 6.0 mg/dL |
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Term
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Definition
They block the rebsorption of filtered urate in the proximal tubules thus trap it in the lumen to be excreted. This lowers the SUA. |
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Term
When can you use an Uricosuric? |
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Definition
1. Documented underexcreter
2. If CrCl > 50 ml/min
3. If not on low dose ASA
4. Have no nephrolithiasis |
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Term
Why cant you give a Uricosuric drug to a patient who is on ASA? |
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Definition
ASA inhibits the Uricosuric action |
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Term
Some adverse reactions of Uricosuric drugs include: |
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Definition
1. Nausea/vomiting
2. Allergic rxn
3. Urolithiasis
4. Anorexia |
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Term
If a patient develops Urolithiasis, what can they do? |
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Definition
Hydrate!!! Drink 2-3 L/day
We also want to alkalinize the urine |
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Term
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Definition
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Term
Describe the dosing for the drug Probenecid. |
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Definition
Start at 250 mg by mouth 2x/day. Gradually titrate every 1-2 weeks until the urate is < 6.0 mg/dL. |
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Term
T/F: Probenecid is safe to use on patients with uric acid kidney stones. |
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Definition
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Term
What are some Rx that are used to help alkalinize the pH? |
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Definition
1. NaHCO3/K Citrate
2. Citric Acid/Na Citrate |
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Term
Both ______________ and _____________ are Rx that increase the renal urate clearance thus decreasing the Urate. |
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Definition
Losartan (for high B.P)
Fenofibrate (for high lipids) |
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Term
Overproducers should use _________________ whereas underexcretors should use ______________. |
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Definition
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Term
How should Naproxen (Aleve) be administerd for Acute Gouty Arthritis? |
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Definition
500 mg 2x/day for 3-5 days
then 250 mg 2x/day for 2-3 days |
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Term
How should Ibuprofen be administered for the treatment of Acute Gouty Arthritis? |
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Definition
800 mg 1x/day for 3-5 days
then 400 mg 1x/day for 2-3 days |
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