Arthritis pharmacology Flashcards
When would you give an NSAID?
Inflammatory arthritis
mechanical MSK pain
Serositis
What kind of drug is celecoxib?
Cox-2 inhibitors
How do cox-2 inhibitors work?
They inhibit cyclooxygenase-2 which stops the formation of prostaglandins
Give an example of a cox-1 inhibitor
aspirin
Why does taking NSAIDs increase risk of peptic ulcers?
Prostaglandin is inhibited by NSAIDs.
Prostaglandin inhibits HCl secretion in stomach.
No prostaglandins then more HCl in the stomach, leading to peptic ulcers
What can be other adverse effects of NSAIDs?
Wheeze
Rash
Renal impairment
What is the analgesic pathway ?
Non-opioid e.g. aspirin, NSAID, paracetamol,
THEN
Weak opioid e.g. codeine
THEN
Strong opioid e.g. morphine
What is a DMARD?
Disease modifying anti-rheumatic drug
Why use a DMARD?
Reduces inflammation
Reduces the rate of joint damage
What do you need to keep in mind when using DMARDs?
Must have regular blood tests
Within what time period of symptom onset is a DMARD aimed to begin?
Within 3 months
Which DMARDs are used for RA?
Methotrexate
Sulfsalazine
In what other conditions is methotrexate prescribed?
Connective tissue disease
vasculitis
Psoriatic arthritis
What adverse effects must you remember about methotrexate?
Hepatitis- limited alcohol
Mouth ulcers
Leucopenia
N&D
FBCs and LFTs monitored
Methotrexate is teratogenic. What time period must it be stopped before conception?
3 months
What are the adverse effects of sulfsalazine?
Rash
Neutropenia
Hepatitis
oligozoospermia