Pharmacology Flashcards
calcium channel blockers
- Side effects (2)
Diltiazem verapamil amlodipine
Ankle swelling , gingival hyperplasia
Beta blockers
-side effects (1)
Atenolol bisoprolol
- bronchoconstriction - wheeze, SOB , heavy chest
Beta agonist
- side effect (6)
Salbutamol
Tachycardia, palpitations , muscle twitching and tremors
Shaky hands
HypOkalemia
ACEi
- side effects (2)
Lisinopril, enalapril
Dry cough —- give ARBs instead
HypERkalemia
Loop diuretics
- side effects (3)
Furosemide
HypOnatremia, HypOkalemia, Gout (hypERuricemia)
Thiazides diuretics
- side effects (5)
Bendroflumethiazide
- hypOnatremia, HypOkalemia, gout
Postural hypotension
Hyperglycaemia
Postassium sparing diuretic
- spironolactone
HypOnatremia, HypERkalemia
Gynecomastia
Metoclopramide
- side effects
Extrapyramidal
- dystocia , akathisia, Parkinsonism, bradykinesia , tremors
Neuroleptic malignant syndrome
- high fever , sweating , tachycardia, agitation, confusion, muscle rigidity , neck stiffness
Haloperidol
- side effect
Sexual dysfunction
Gynecomastia
SSRi
- side effect
Fluoxetine
HypOnatremia
Citalopram
- drug type
- side effect (4)
SSRI
Acute angle closure glaucoma - urgent referral to ophthalmologist
HypOnatremia , unstable gait , falls
Duloxetine
- drug type
- side effects (1)
SNRI
Increased risk of fall - especially in elderly
Uncommon side effect of statin
Rhabdomyolysis
Uncommon side effect of Augmentin
Cholestatic hepatitis / drug induced hepatotoxicity
Especially in elderly
How to change dose
- oral morphine to SC morphine
- oral orhine to SC diamorphine
- oral tramadol to IV morphine
To SC - divide by 2
To SC dia - divide by 3
Tram - iv morphine - divide by 20
Best route to receive benzodiazepines in end of life care
Rectal diazepam
4 medications that need to be stopped if patient presents with diarrhoea/vomiting
DAMN Diuretics - dehydration ACEi & ARBs. - AKI Metformin - lactic acidosis in dehydration NSAIDs - AKI
Treatment of painful muscle spasm
Baclofen - muscle relaxant
Or diazepam
Medications used to treat neuropathic pain (4)
Shooting , burning , electric shock type
- amitriptyline
- Gabapentin
- Duloxetine
- pregabalin
Medication for trigeminal neuralgia
Carbamazepine - anticonvulsant
Treatment of bone pain due to mets
1st line - radiotherapy
2- bisphosphonate + NSAIDs
Drug that alleviates alcohol withdrawal symptoms
Chlordiazepoxide
Drug that alleviates alchol craving
Acamprosate
Deterrent drug to be used in alcohol withdrawal
Disulfiram
Drug that helps combat opiate withdrawal
Methadone
- method 1 for detoxification and withdrawal sx
Nice guideline management of asthma
1.SABA
2.SABA + inhaled corticosteroid
3. 2+ LTRA
4.2+LABA +- LTRA
5.SABA + MART (low dose ICS +- LTRA)
6. SABA + MART (mod dose ICS +- LTRA)
7/SABA +- LTRA + one of the following
- further increase in ICS dose
- theophylline trial
- professional advise
BTS guideline asthma
- SABA
- SABA + inhaled corticosteroid
- 2+ LABA
- SABA + ICS + LTRA
LABA vs LTRA
ICS
LABA - salmeterol
LTRA - montelukast
ICS - inhaled corticosteroids - beclometasone
Dry cough can be a side effect of (2)
ACEi
Methotrexate
- prolonged intake can lead to pulmonary fibrosis (rare)
PF - dry cough , dyspnoea on mild exertion , diffuse bilateral infiltrates on xray
A medication that is anti folic acid
Methotrexate
Trimethoprim
Post operative intractable nausea & vomiting
Medication -
IV ondansetron
Antiemetic in renal failure/hypercalcemia
Or drug induced vomiting
Haloperidol If CI (Parkinson’s) - levomepromazine
Anti emetic in raised ICP
Cyclizine
Antiemetic in chemo, radio and post op
Ondansetron
Hymeresis antiemetic
1st 2nd 3rd
1- zines = cyclizine , promethazine
2- IV metoclopramide, ondansetron
3- steroids
Medication for vertigo (Menderes, BPPV, vestibular neuritis)
Buccal prochlorperazine
Most important symptom to urgently report if on warfarin
Headache
They are liable to subdural hematoma
Symptom to be urgently reported inpatient on bisphosphonates
Sever sudden heartburn / chest pain
Drugs that cause Hyperkalemia
ACEi
Potassium sparing diuretics
The use of what drug is CI when using macrolides
Simavastatin**
Macrolides - erythromycin, clarithromycin etc
Note : macrolides + atorvastatin is fine
MOA of tranexamic acid
Use
Inhibits fibrinolysis
- menorrhagia
N - acetylcysteine - MOA
Use
Protection form free radicals
For paracetamol overdose
LMWH
MOA
Inhibits conversion of prothrombin to thrombin
Activate the anti thrombin
How does copper IUD work as an emergency contraception after unprotected sex
Inhibits implantation
MOA of POPs
Inhibit ovulation
Ulipristal acetate (EllaOne) MOA
Inhibits or delays ovulation
Calculating units of alcohol
Beer
Wine
Cider
Strength ABV % x Volume
_______________________
1000
= units
Beer
1 pint- 3.5% - 2 units
1 pint premium - 5-6% - 3 units
Wine
Small - 125 ml - 1.5 unit
Medium - 175 ml - 2 units
Large - 250ml - 3 units
Cider = 3 units
UK guidelines on alcohol consumption per week
Not more than
14 units/week
3 units/day
At least 2 alcohol free days / week
Drugs causing neuroleptic syndrome
Haloperidol
Metoclopramide
Management of neuroleptic malignant syndrome
Stop antipsychotic Rapid cooling IV fluids - prevent renal failure Dantrolene - post synaptic muscle relaxant Bromocriptine
Meds not to be given in Parkinson’s
Metaclopramide
Haloperidol - use lamotrigine
Tests before commencing lithium (4)
RFT LFT TFT baseline ECG
Pulse, BP , pregnancy test , PTH , FBC , UE, ca, mg
When can fentanyl patches be used in pain control of cancer patients
If oral not tolerated + stable patient @ shifting time
Oral codeine can be replaced by __
Buprenorphine patch
SC morphine
- there is no SC codeine
Never shift to fentanyl patch if _
Pain is not controlled
Takes 12-24 hrs to achieve therapeutic level
Why does the plasma concentration of a drug peak much faster for IV routes than oral route
Hepatic first pass elimination
Treatment of ringworm
Clotrimazole cream
What is to be given in heroin
- overdose
- detox
Naloxone
Methadone
Heroin withdrawal features
Watery eyes + Runny nose
Insomnia
Agitation
Treatment of ascites 2ry to cirrhosis
Spironolactone
Liver cancer + hiccups
Med to be given
Metoclopramide
Non sedating anti-histamine
Cetrizine
Loratidine
Sedating antihistamine
Chlorpheniramine
Co-careldopa (Sinemet)
Use
Complication
Levodopa + carbidopa
Use- Parkinson’s
Sudden cessation - can cause akinesia
Reduce dose if patient. Develops hallucination
Indapamide
Thiazides like diuretic
Drug to maintain abstinence in opioid user
Naltrexone
Impacted stool tx
Phosphate enema
If young healthy - glycerol suppositories
Hard stool tx
Stool softener ‘
Constipation in pregnancy
Ispaghula - 1
Lactulose - 2
Before commencing sodium valproate check :
LFT
FBC
Pregnancy
Investigations before starting ACEi
How often should they be repeated
RFT
Electrolytes - esp K+
1-2 weeks after initiating , then annular
Corticosteroid induced psychosis
Prednisolone in COPD exacerbation
1ry biliary cirrhosis
Raised ALP
Associated Sjögren’s syndrome
Investigation - anti - mitochondrial antibodies
1ry sclerosing cholangitis
Usually associated w/ ulcerative colitis
Investigation - ERCP
Autoimmune hepatitis
Normal/mildly elevated ALP +- 2ry amenorrhoea +- autoimmune disease
Abnormal AST ALT
Alcoholic liver disease
Heavy alcohol consumption
Raised AST :ALT ratio
Raised GGT
Cholestatic hepatitis
Recent use of co amoxiclav
Raised ALT ALP GGT Bilirubin
Short term oral cortcosteroids can cause
Sleep disturbance
Restlessness
Indigestion
Risk of QT prolongation when clarithromycin is used with -
Methadone
Clarithromycin interactions
+ methadone - QT prolongation
+ statin - rhabdomyolysis
+Salbutamol - HypOkalemia
Adrenaline + lidocaine
What is the benefit?
Prolongs duration of local anaesthesia
Adrenaline - constricts blood vessels - delays lidocaine absorption
Clozapine and smoking
Smoking increases CYP1A2 enzyme
Clozapine - metabolised by ^
So dose of clozapine reduced if he stops smoking for fear of toxicity
Paracetamol overdose sx
12-36 hrs
2-3 days
1- nausea vomiting abdominal pain
2- hepatic necrosis, subcostal pain and tenderness, AKI, hepatic encephalopathy
Features of fluoxetine overdose
Tremors , agitation
Dilated pupils , drowsiness
GI sx, QRS QT prolongation - torsades des pointes
Drug calculations
1% , 0.5%
1% = 10 mg/ml .5% = 5mg/ml
Metronidazole + alcohol
Avoid alcohol during treatment and at least 48 hrs after stopping treatment
Due to - disulfiram like reaction
S/e of ACEi
Dry cough.
Hyperkalemia
Recurrent falls in its with postural hypotension