Sexual Dysfunction - Quiz 3 Flashcards
What is ED?
Difficulty getting or sustaining an erection for sex
HSDD drugs are only indiated for who?
Premenopausal women only
What is an antidepressant that doesn’t cause sexual dysfunction?
Buproprion
Medications that can cause ED?
- Alcohol
- Antidepressants (SSRIs, SNRIs)
- Antihypertesives (beta-blockers, clonidine, thiazides)
- First gen antipsychotics
- Prolactin raising second gen
- BPH meds (finasteride, dutasteride, silodosin)
Non pharm tx for ED?
- Weight loss
- Quitting tobacco
- Reducing alcohol intake
Natural products for ED?
- Yohimbe
- L-arginine
- Panax ginseng (increases risk for bleeding)
What is the first line tx for ED?
PDE-5 inhibitors:
1. Slidenafil
2. Vardenafil
3. Tadalafil
4. Avanafil
Reasons for PDE5 inhibitor treatment failure?
Timing of dose
PDE5 inhibitor indicated for BPH?
Tadalafil (Cialis): 5 mg PO QD
PDE5 inhibitors that can treat PAH?
- Sildenafil (Revatio)
- Tadalafil (Adcirca, ALyq)
Describe the MOA of PDE5-I?
Inhibits the degradation of cGMP upon NO release to relax the smooth muscles in the arteries increasing blood flow maintaining an erection
Requires libido to work
Sildenafil
Revatio, Viagra
Tadalafil
Cialis, Adcirca, Alyq
Vardenafil
Levitra
Avanafil
Stendra
Starting dose of Viagra?
50 mg
Starting dose of Cialis?
10 mg
Starting dose of Levitra?
10 mg
Starting dose of Stendra
100mg
When would you see a reduction in PDE5I starting dose? What are the lower doses?
- ≥65YO
- Using an alpha blocker
- Using CYP3A4 inhibitor
- Severe renal and hepatic impairment
Reduce dose by 50%
CI for PDE5I?
Nitrates
ADRs of PDE5I?
- Impaired color discrimination
- Hearing loss
- Vision loss
- Hypotension
- Priapism
- Chest pain
- HA, flushing, DZ, dyspepsia
- Back pain (tadalafil)
How should you take PDEIs?
Sildenafil: 1 hr before
Vardenafil: 1 hr before
Tadalafil: 30 min before
Avanafil: 15-30 min before
Sildenafil and vardenafil can have decreased activity with high fat foods or large meals
Don’t take more than 1 dose per day
Why are PDE5I CI with nitrates?
Can cause severe hypotension
What is another class of drug used for ED other than PDE5I?
Prostaglandin E1: Alprostadil (Caverject, Muse)
MOA of PG E1?
Vasodilator allowing blood flow into the cavernosal arteries -> enlarging the penis
Difference between Caverject and Muse
Caverject: Intracavernous injection
Muse: Require refrigeration (Urethral pellet)
ADRs of alprostadil?
Penile pain, priapism
Drugs indicated for hypoactive sexual desire disorder? Drug classes?
5-HT1A agonist/5-HT2A antagonsit: Filbanserin (Addyi)
Nonselective melanosortin receptor agonist: Bremelonotide (Vyleesi)
Formulation os Vyleesi?
Injection
BBW of Addyi?
CI: acohol due to severe hypotension and syncope (REMS program)
Combination with CYP3A4 inhibitors
ADR of Filbanserin?
- Hypotension
- Syncope
CI for bremelonatide?
Uncontrolled hypertension or CVD
Alprostadil
Caverject, Muse
Filbanserin
Addyi
Bremelanotide
Vyleesi
Counseling points for all PDE5i?
- When to take it
- Sexual activity can put strain on heart
- Cause: priapism, orthostasis and hypotension, DZ, HA, flushing, and indigestion
- Tinnitus
- Vision changes
Counseling for tadalafil (Cialis)
Can cause back pain (last up to 2 days)