Exam 2 Flashcards
What is the major effect of all NSAID’s?
Decrease synthesis of prostaglandins by inhibiting cycle oxygenate
What do Prostaglandins do in the body?
1) Enhance inflammatory process
2) Increase renal blood flow
3) protects the GI mucosa
MOA of COX-1
Gastroprotective effects
MOA of COX-2
Produces proinflammatory mediators
Problems associated with acute toxicity:
1) GIT symptoms = MC (Dyspepsia)
2) Renal effects = 2nd MC
Treatment for acute overdose:
1) Secure airway
2) Activated Charcoal
3) Transport
MOA of Salicylate Toxicity:
1) Inc. metabolic rate
2) inc. O2 consumption
3) inc. CO2 formation
4) inc. heat production
5) inc. glucose use
6) depletion of hepatic glycogen
Clinical features of salicylate toxicity
- nausea/vomiting
- tachypnea
- tinnitus
- metabolic acidosis
Why is Acetomenophen toxicity worse in alcoholics?
Due to introduction of Hepatic Microsomal Enzyme Systems
Vitamin A Acute Toxicity clinical features:
- Pseudotumor Cerebri
- Tired/Irritable
- Hair Loss
- Hepatomegaly
Chronic Vitamin A toxicity clinical features
- bone pain
- visual disturbances
- fatigue, but difficulty sleeping
- dry skin/hair loss
- elevated Alk Phos
- Periosteal calcification
Vitamin D toxicity clinical features
- Hypercalcemia
- Weakness
- Headache/Fatigue
- ST Calcificaton
- Polyuria/Polydipsia
- nephrocalcinosis
Vitamin C toxicityClinical features:
- Urinary calculi
- elevated Estradiol (when taking birth control)
- Inc. iron absorption
- Diarrhea, Nausea, Craming
When is increased iron absorption dangerous?
In patients with Hemochromatosis
Functions of Histamine
1) Mediates all Allergic responses
2) Regulates Gastric acid secretion
3) CNS neurotransmitter
Function of H1 Antihistamine
Stimulation…
1) constricts bronchioles
2) Dilates peripheral vasculature
3) inc. vascular permeability
Function of H2 Antihistamine
1) Regulates Gastric acid secretion
In the CNS, H1 & H2…
Modulate…
1) Arousal
2) Thermoregulation
3) Neuroendocrine functions
Function of H3 Antihistamine
1) Presynaptic regulator of histamine synthesis and release
What are H1 receptor blockers?
1) Reversible & Competitive
2) Inhibit H1 receptors
3) Competitive inhibitors of Muscanaric receptors
4) Block sodium channels disrupting cortical neurotransmission
Antihistamine Toxicity clinical features
1) Sedation
2) Headache
3) Dry Mouth
4) Nausea
5) Menstrual Pain (Allegra)
What are H2 receptor blockers used to treat?
Heartburn
Clinical indications to use an H2 receptor blocker
1) Brady/tachycardia
2) confusion
3) agitation
4) delirium
5) Seizures
Examples of H2 receptor blockers
1) Tagamet
2) Zantac
3) Pepcid
4) Axid