PSA: prescription writing Flashcards
what must all prescriptions include
- legible
- unambiguous (don’t give a range of doses)
- approved generic name (unless brand is important)
- IN CAPITALS
- no abbreviations
- signed and with a bleep number
- if ‘as required’ provide a) indication and b) max freq or total dose in 24hrs
- if it is an antibiotic, include indication and stop/review date
- include duration
what are the most common cytochrome p450 inducers. what does this mean?
increased enzyme activity –> decreased drug concentration as it is metabolised quickly
PC BRAS
Phenytoin
Carbamazepine
Barbituates
Rifampicin
Alcohol (chronic excess)
Sulphonylureas
what are the most common cytochrome p450 inhibitors. what does this mean?
decreased enzyme activity –> increased drug concentrations as not metabolsied quickly
AODEVICES
Allopurinol
Omeprazole
Disulfiram
Erythromycin
Valproate
Isoniazid
Ciprofloxacin
Ethanol (Acute intoxication)
Sulfonamides
what does o.n mean
omni nocte (every night)
what does o.m. mean
o. m. = omni mane (every morning)
what does p.c. mean
p. c. = post cibum (after food)
what does PRN mean
p. r. n. = pro re nata (when required)
Management of delirium
- treatment of the underlying cause
+ modification of the environment - haloperidol 0.5 mg oral every 2-4 hours until there is a clinical response. or olanzapine.
USE FOR 1W OR LESS - lorazepam 0.5mg-1mg oral every 2 hours until response. max 2mg/24hr. prescribe at STAT. can do IM or slow IV inj if req
USE FOR 48 hr OR LESS
management iron salt poisoning eg Ferrous sulphate tablets
desferrioxamine mesilate
intravenous infusion
initial infusion up to a rate of 15 mg/kg/hour, (max. 80 mg/kg in 24 hours)
dosing sertraline depression
50mg od
key features for identifying opioid overdose
pinpoint pupils
resp depression
PReSCRIBER mneumonic
Patient details
Reaction (allergy plus reaction)
e
Sign front of chart
Route
IV fluids needed?
Blood clot prophylaxis needed?
antiEmetic needed?
pain Relief needed?
what drug in heart failure reduces morbidity and mortality
beta blocker
bisoprolol
what to include in a prescription for controlled drugs
Name and address of patient (printed or written, but no sticky labels)
Approved product name, strength (where more than one exists), and formulation (e.g. solution)
Dose (‘when required’ or ‘as directed’ is not acceptable unless accompanied by an actual dose)
Total quantity to supply must be in words and figures.
Prescriber’s handwritten signature, and date (can be word-processed or handwritten)
Prescriber’s address.
Writing adrenaline drug name for anaphylaxis
Drug: Adrenaline (1:1000)
500mcg = 0.5ml of 1:1000
Writing aciclovir prescription for HSV encephalitis
frequency : x hourly (change in renal impairment)
duration : 14 days
when prescribing a topical treatment sucha s a steroid, what is important in the drug name
the concentration and formulation eg.
Hydrocortisone 1% cream
major fracture, pain relief?
iv morphine
if a pt is vomiting, what route should antiemetics be given
not oral ie iv im or subcut
who gets blood clot prophylaxis? who to be careful of?
almost everyone - assessment is on the drug card
LMWH eg dalteparin 5000 units daily s/c + compression stocking
dont give anticoagulation if risk of bleeding eg recent stroke
dont give compression stocking if PAD
write a prescription for regualr paracetamol
paracetamol 1g oral 6 hourly
write a prescription for regular co-codamol
Co-codamol 30/500, 2 tablets, 6hourly, oral
write a PRN prescription for paracetamol
paracetamol 1g up to 6 hourly oral
write a PRN prescription for codeine
codeine 30mg up to 6 hourly oral
write a PRN prescription for oromorph
morphine sulphate (10mg/5ml)
10mg
up to 6 hourly
oral
write a prescription neuropathic pain
amitryptilline 10mg oral nightly
for how long should you not give thromboprophylaxis stroke
varies but typically a few months
Prescribe for scabies
permethrin 5% cream
Apply to whole body
Topical
Once weekly for two doses
Prescribe for GORD
omeprazole
20mg
oral
1 month
Prescribe for bph
Tamsulosin hydrochloride oral - 400 micrograms once daily