Community Pharmacy Flashcards
(44 cards)
What is guaifenesin?
What is the dose?
Expectorant.
6-12yrs (discourage use): 100mg qid
Adults: 200mg qid
What is bromhexine?
Dose? Side effects?
Mucolytic.
8mg tds (up to 16mg tds first week).
SE: N/V/D
How to treat cough in children under 12?
Increase fluid. Potentially try non-pharmacological cough mixture such as a demulcent, eg. simple linctus
Egs of cough suppressants? Side effects?
Dihydrocodeine [Rikodeine - S3] (most abuse potential), pholcodine, dextromethorphan.
Opiate derivatives - caution sedation and respiratory depression, constipation.
Dextromethorphan - serotonin syndrome
5 most common viruses that produce symptoms of the common cold?
Rhinoviruses (30-50%), coronaviruses, parainfluenza virus, respiratory syncytial virus, adenovirus
Incubation period of the common cold?
Usually 1-3 days (can be short as 10-12 hours)
Normal body temp? Fever severity?
Normal 37*
Fever if oral/axillary >37.6* or rectal/ear >38.1*
Mild-mod less than 39*
(listening to farts is hotter than licking armpits)
What are the four pairs of sinuses called?
Frontal,
Ethmoid,
Maxillary,
Sphenoidal
When to prescribe antibiotics for rhinosinusitis?
- > 3 days & severe sx, high fever (>39*C)
- > 7 days with unilateral maxillary tenderness & purulent discharge
- worsening sx after initial improvement
Role of intranasal ipratropium in the common cold? What age suitable for?
Good for rhinorrhoea, no evidence for use in nasal congestion.
(For >12yo)
Types of influenza?
A - affect humans & animals. Cause seasonal epidemics.
Only type to cause pandemics (e.g. bird & swine flu).
Two surface proteins: hemagglutinin and neuraminidase.
B - affect humans only. Mutate more slowly than A.
Cause seasonal epidemics. Can be severe.
Two lineages: Victoria and Yamagata.
C - mild
D - affect cattle, do not appear to affect humans.
How to treat stuffy noses in babies?
Saline nose drops can be used from birth to help with congestion.
Phenylephrine/pseudoephedrine considerations?
- Age
- 3 SEs
- Drug interactions
- P&B
Not recommended <12yo
3 likely SEs: insomnia, may cause tachycardia. Can increase BP, but likely ok if short course.
Risk of hypertensive crisis with with MAOIs & moclobemide.
Caution in patients taking beta-blockers & TCAs. Consider topical.
Avoid in pregnancy & breastfeeding.
Topical sympathomimetics ok in breastfeeding & could use after first semester.
Differentiating viral sore throat from bacterial (usu. Strep).
Very difficult, but usually:
- Strep/bact: swollen glands, exudate, high-grade fever, no cough
- Viral: no swollen glands or exudate, low-grade fever, cough & headache
- Strep unlikely if <3yo
- Strep most prevalent in 5-15yo.
- EBV / glandular fever peak incidence teens & young adults.
- Viral more likely in adults.
What are the Centor criteria? What do you do if someone has 3 or all symptoms?
Used to determine likelihood of strep.
- Cough absent
- Exudate (pharyngeal/tonsillar)
- Nodes (swollen cervical glands)
- Temperature - high grade fever (>38*C)
Refer as more likely to be bacterial & require antibiotics, esp. if <15yo
Medications known to cause agranulocytosis?
Think “gran” for the mnemonic
The triple C had a PASS at gran(ulocytosis)
Cytotoxics, Captopril, Carbimazole Penicillamine Antipsychotics Sulfasalazine Sulfonamides
When to refer sore throat?
think of a painful plaited noose for the mnemonic
BRAIDD
Bacterial sx Rash ADR Indigenous 2-25yo remote/rural Dysphagia/phonia Duration >2 weeks
8 possible causes sore throat?
A common cold virus EBV Bacterial, eg Strep Mouth ulcers Candida Trauma Agranulocytosis from meds Cancer
Management of unilateral nasal congestion in a child?
Refer - likely foreign body blockage.
What is the least sedating antihistamine & why?
What is the most sedating of the less sedating antihistamines?
Loratadine - lowest affinity for histamine receptors in the brain.
Cetirizine.
intraocular antihistamines?
Which are also available intranasally?
Antazoline
Pheniramine
Ketotifen
Also intranasal: azelastine & levocabastine
Ocular sympathomimetics?
Naphazoline & tetrahydrozoline - caution rebound conjunctivitis
Treatment of allergic rhinitis in pregnant women?
Oral antihistamines: dexchlorpheniramine has most evidence, but less sedating antihistamines should also be safe to use (des/loratadine B1, fexo & cetir B2).
DO NOT USE promethazine.
Eye drops and nasal sprays okay.
Treatment of common cold in pregnant women?
Systemic sedating antihistamines OK (help sleep).
Intranasal sympathomimetics OK.
Intranasal ipratropium OK.
DO NOT USE promethazine.
DO NOT USE systemic sympathomimetics.
DO NOT USE combo products.