Card Set Information
for my upcoming pharm exam
What is AUA scoring?
: mild to asx
: severe with complications
What do urine flow labs show?
PVR > 30 ml, uroflowmetry <10mL/sec
What causes the prostate to enlarge?
5 alpha reductase converts testosterone to DHT in the prostate, and DHT causes prostatic enlargement
What exacerbates BPH obstruction?
Anticholinergics (antihistamines, TCA, phenothiazines=>decrease/weaken detrusor tone)
Alpha-adrengeric (ephedrine, phenylephrine, pseudoephedrine)=> increase bladder sphinctor tone
In what types of pts is surgery recommended for BPH?
Pts with urinary retention needing permanent catheterization; those with malignancy, severe complications, or medical tx resistance
List the 2G alpha 1 blockers
Alfuzosin is the only one that is really safe to use
How are 2g alpha 1 blockers titrated?
: 1 mg HS
: 2 mg HS
: 5 mg HS
Week four on ward
: 10 mg HS
What are the advantages of alpha 1 blockers?
onset 2-4 weeks
6-10 year durable
What are the disadvantages of alpha 1 blockers?
CHF (particularly doxazocin)
Name the 3G alpha 1A blocker
What are the advantages and disadvantages of Flomax?
: less orthostatic HOTN
: retrograde ejaculate, cataract surgery, sulfa allergy, interaction with phosphodiesterase type-5 (except tadalafil)
What is the indication for 5 alpha reductase inhibitors?
Pts with prostate enlargement > 40 grams
What are the two 5 alpha reductase inhibitors?
What are the advantages of 5 alpha reductase inhibitors?
no orthostatic HOTN
4-6 year durable
What are the disadvantages of the 5 alpha reductase inhibitors?
Onset within 6mo
PSA reduction of 50% which means you might not be able to detect prostate carcinomas
Increased rate of high grade carcinomas
What is the indication for combo therapy for BPH?
Resistant therapy or high risk of progression
What are the causes of urinary incontinence?
Pharmaceuticals (anticholinergics, alpha blockers, sedatives, narcotics)
Excessive urine output
How do you tx urge incontinence?
Oxybutin (a non-selective anticholinergic) is the DOC
Selectives are tolterodine, trospium, solifenacin, darifenacin
How is ditroban dosed?
: non-selective anticholinergic for stress incontinence
Titration from 2.5 mg BID to 5mg TID over months
Why is long acting ditropan better than nl length?
: non-selective anticholinergic
Titration is less (5mg QD to 30 mg daily over weeks)
What are ADRs of non-selective anticholinergics?
Which selective anticholinergic is associated with the cypP450 system?
Which selective anticholinergic is destroyed by antacids?
Which selective anticholinergic is associated with less CNS ADRs?
What makes trospium not a great drug?
: selective anticholinergic
Oral absorption <10%, expensive
Which selective anticholinergics actually have questionable selectivity?
Solifenacin and Darifenacin
What is darifenacin's advnatage over IR oxybutynin?
Dry mouth may be < than IR oxybutynin
How do you tx stress incontinence?
Alpha adrenergic agonists
How do you tx overflow incontinence due to bladder outlet obstruction?
How do you tx overflow incontinence due to bladder underactivity?
Cholinergic agonist (Urocholine)
What is the formal definition of ED?
Persistent ED (at least 6mo), inability to achieve or maintain an erection of sufficient duration and firmness to complete satisfactory intercourse through caginal penetration
What are vascular sources of ED?
HL, ESRD, smoking, HTN
What are neurologic causes of ED?
Stroke, DM, prostate surgery
What are hormonal sources of ED?
Excess PRL and/or decreased testosterone
What are drug induced causes of ED?
5 alpha reductase inhibitors, anti-HTN, psychiatric medicines, alcohol, illicit drugs, cigarette smoking, some diuretics
Which HTN meds contribute to ED?
HCTZ, BB, alpha blockers (methyldopa, clonidine)
Therefore pt should use ACE-I, ARBs, CCB
What psych meds contribute to ED?
TCA, antipsychotics, benzos
Why is intracavernosal testosterone replacement DCd?
Unnatural, non-spontaneous erection
Why are Phosphodiesterase inhibitors (type 5) used in ED?
They inhibit the enzyme, enhancing effects of nitric oxide-activated increases in cGMP
What do you educate patients about when taking phosphodiesterase inhibitors?
Don't take with food, and need foreplay
Failure after 8 unsuccesful uses
What is the timing of the different phosphodiesterase inhibitors?
Levitra and Viagra 60 mins before, cialis 30 min
Which ED drugs are associated most with hypotension?
Viagra and Levitra, 5-6mmHg decrease
Which ED drugs are associated with vision loss?
Which ED drugs are associated with myalgia?
What are the phosphodiesterase inhibitor DI?
Alpha blockers (either reduce PDE-5 dose or separate by 4+ hours)
Cyp3A4 inhibitors (macrolide abx, antifungal agents, protease inhibitors)