Medications Flashcards
(40 cards)
Which chemotherapy drugs cause secondary malignancy?
- Cyclophosphamide.
- Etoposide (AML).
What is the most common long term side effect of cyclosporin?
- Hirsuitism.
Side effects of asparginase?
- Pancreatitis, hyperglycaema, allergies, coagulopathy, encephalopathy.
Side effects of cyclophosphamide?
- Myelosuppression, haemorrhagic cystitis, secondary malignancy, sterility, lung fibrosis, SIADH.
Side effects of doxorubicin?
- Myelosuppression, necrosis on extravasation, cardiotoxicity, radiation recall.
Side effects of vincristine?
- Peripheral neuropathy, ptosis, constipation, jaw and bone pain, extravasation injury.
Side effects of 6-mercaptopurine?
- Myelosuppression, hepatic necrosis.
Which hepatic enzyme is induced by St Johns Wort?
- CYP3A4
Which hepatic enzyme does cyclosporin inhibit?
- CYP3A4
What medication is used as first line treatment for threadworm/pinworm (Enterobius vermiculars)?
- Pyrantel or mebendazole.
- Shower on the night medication and again in the morning to remove eggs laid overnight.
How many half lives does it take for a drug to reach steady state?
5
Which antiepileptic should not be used in JME?
- Carbemazapine.
- Known to cause deterioration in 68% of patients with JME.
Side effects of Vigabatrin?
- Visual field constriction from peripheral retinal atrophy.
- Optic neuritis.
- Vision loss (rods > cones so predominantly night vision).
Side effects of Carbamazepine?
- Nausea and vomiting.
- Dizziness.
- Drowsiness.
- Liver dysfunction.
- Hyponatraemia (SIADH).
Side effects of Gabapentin?
- Somnolence.
- Dizziness.
- Tremor/ataxia.
Side effects of Lamotrigine?
- Rash.
- Nausea.
- Dizziness.
- Tremor.
- Diplopia.
Side effects of Sodium Valproate?
- Weight gain.
- Hair loss.
- Tremor.
- Dizziness.
- Nausea and vomiting.
- Easy bruising.
- Birth defects.
What medications increase cyclosporin levels?
- Ketoconazole, erythromycin, warfarin, itraconazole and fluconazole.
What medications decrease cyclosporin levels?
- Phenytoin, phenobarbitol, carbamazepine, rifampicin, alcohol abuse, sulphynyureas, St Johns Wort.
What are side effects of hydroxycholoquine?
- Nausea - most common side effect and may stop children from eating. Wean the dose and advise to give at night.
- Corneal toxicity - reversible.
- Retinal toxicity - rare, loss of colour vision and blindness. Irreversible.
How does Tocilizumab work?
- Tocilizumab is a recombinant humanized anti-human monoclonal antibody directed against IL-6 receptor.
How does Infliximab work?
- Chimeric monoclonal antibody that binds TNFa.
- Etnercept also binds TNFa but is a recombinant protein.
How does Anakinra work?
- IL1 inhibitor.
- Canakinumab and Rilanocept are also IL1 inhibitors.
Why does topiramate cause nephrolithiasis?
- Inhibits carbonic anhydrase leading to metabolic acidosis.
- Defect in renal tubular acidification as a result of loss of carbonic anhydrase impairs compensatory drop in urine pH.
- This leads to development of calcium phosphate nephrolithiasis.