AV Pharmacology Flashcards
Contraindications for Aspirin
- Hypersensitivity to aspirin/salicyates
- Actively bleeding peptic ulcers
- Bleeding disorders
- Suspected dissecting aortic aneurysm
- Chest pain associated with psychostimulant OD if SBP >160mmHg
Precautions for Aspirin
- Peptic ulcer
- Asthma
- Patients on anticoagulants
Side effects of Aspirin
Heartburn, nausea, GI bleeding, increased bleeding time, hypersensitivity reactions
Indications for GTN
- Chest pain with ACS
- Acute LVF
- Hypertension associated with ACS
- Autonomic dysreflexia
- Preterm labour (consult)
Actions for GTN
- Venous dilatation promotes venous pooling and reduced venous return to the heart, reducing preload
- Arterial dilatation reduces systemic vascular resistance and arterial pressure, reducing afterload
Contraindications for GTN
- Known hypersensitivity
- SBP <110mmHg (tablet)
- SBP <90mmHg (patch)
- Sildenafil (Viagra) or Vardenafil (Levitra) in previous 24/24 or Taladafil (Cialis) in previous 4/7
- HR >150bpm
- Bradycardia <50bpm (ex. Autonomic Dysreflexia)
- VT
- Inferior STEMI with SBP <160mmHg
- Right ventricular MI
Precautions for GTN
- No previous administration
- Elderly patients
- Recent MI
- Concurrent use with other tocolytics (labor suppressants)
Side effects for GTN
- Tachycardia
- Hypotension
- Headache
- Skin flushing (uncommon)
- Bradycardia (occasionally)
Onset, peak and duration for S/L GTN
O: 30 seconds - 1 minute
P: 5 - 10 minutes
D: 15 - 30 minutes
Onset and peak for transdermal GTN
O: Up to 30 minutes
P: 2 hours
Actions for Adrenaline
- Increases HR by increasing SA node firing rate (B1)
- Increases conduction velocity through AV node (B1)
- Increases myocardial contractility (B1)
- Increases irritability of the ventricles (B1)
- Causes bronchodilatation (B2)
- Causes peripheral vasoconstriction (A)
Indications for Adrenaline
- Cardiac arrest
- Inadequate perfusion
- Bradycardia w/ poor perfusion
- Anaphylaxis
- Severe asthma (imminent life threat not responding to nebulised therapy, or unconscious with no BP)
- Croup
Contraindications for Adrenaline
Hypovolaemic shock without adequate fluid replacement
Precautions for Adrenaline
- Elderly/frail patients
- Pts with cardiovascular disease
- Pts on MAO inhibitors
- Pts on beta blockers (higher doses may be required)
Side effects for Adrenaline
- Tachycardia
- Supraventricular & ventricular arrythmias
- Hypertension
- Pupillary dilatation
- May increase size of MI
- Feeling of anxiety/palpitaions in the conscious pt
Onset, peak and duration for IV Adrenaline
O: 30 sec
P: 3 - 5 mins
D: 5 - 10 mins
Onset, peak and duration for IM Adrenaline
O: 30 - 90 sec
P: 4 - 10 mins
D: 5 - 10 mins
Presentation of Adrenaline
1 mg in 1 mL ampoule
1 mg in 10 mL ampoule
Presentation of Aspirin
300 mg chewable tablet
Presentation of GTN
0.3 mg tablet
50 mg transdermal patch (0.4 mg/hr)
Presentation and preparation of Ceftriaxone
1 g sterile powder in glass vial, diluted w/:
- 10 mL Water for Injection (IV)
- 3.5 mL Lignocaine 1% to make 4 mL (IM)
Indications for Ceftriaxone
- Suspected meningococcal septicaemia
- Severe sepsis (consult only)
Contraindications for Ceftriaxone
Allergy to cephalosporin antibiotics
Precautions for Ceftriaxone
Allergy to penicillin antibiotics
Side effects of Ceftriaxone
Nausea, vomiting, skin rash
Presentation of Dexamethasone
8 mg in 2 mL vial
Actions of Dexamethasone
- Relieves inflammatory reactions
- Provides immunosuppression
Indications for Dexamethasone
- Bronchospasm associated with acute respiratory distress not responsive to nebulised Salbutamol
- Moderate to severe croup
- Acute exacerbation of COPD
- Adult stridor (non- FBAO)
Contraindications for Dexamethasone
Hypersensitivity
Precautions for Dexamethasone
Solutions which are not clear or are contaminated should be discarded (does not contain an antimicrobial agent)
Onset, peak and duration of Dexamethasone IV
O: 30 - 60 mins
P: 2 hours
D: 36 - 72 hours
Presentation of Dextrose 10%
25 g in 250 mL infusion pack
Indications for Dextrose 10%
Diabetic hypoglycaemia (BGL <4 mmol/L) in pts with ACS who are unable to self-administer oral glucose
Onset for Dextrose 10%
3 minutes
Presentation of Fentanyl
100 mcg in 2 mL ampoule
250 mcg in 1 mL cartridge
Actions of Fentanyl
- CNS Depression, leading to analgesia
- Respiratory depression
- Decreases conduction velocity through the AV node
Indications for Fentanyl
- Sedation to facilitate/maintain intubation
- Sedation to facilitiate transthoracic pacing
- Sedation to facilitate syncronised cardioversion
- CPR interfering patient
- Analgesia, if:
- C/I to Morphine
- Short duration of action desirable
- Hypotension
- Nausea and/or vomiting
- Severe headache
Contraindications for Fentanyl
- Hypersensitivity
- Late second stage labour
Precautions for Fentanyl
- Elderly/frail
- Impaired hepatic function
- Respiratory depression (eg COPD)
- Current asthma
- Patients on MAO inhibitors
- Known addiction
- Rhinitis, rhinorrhea or facial trauma (IN route)
Side effects of Fentanyl
- Respiratory depression
- Apnoea
- Rigidity of the diaphragm and intercostal muscles
- Bradycardia
Onset, peak and duration of Fentanyl
O: Immediate (IV), 2 mins (IN)
P: <5 mins
D: 30 - 60 mins