over the counter drugs Flashcards
over the counter drugs
nonprescription drugs used for short term treatment of common minor illnesses.
how many OTC drugs are available
300,000
OTC drugs are regulated by
health canada’s food and drug regulations
how many canadians use OTC drugs
80%
plain language labelling requires
purpose and uses, storage info, dose instructions, inactive ingredients, warnings and adverse effects, when not to use, when to contact doctor, DIN and exp date
process of reclassification
submit a switch application to NDSAC
process of reclassification requires review of
clinical trial results and safety data submitted to health canada
ex of some reclassified OTC drugs: analgesics
acetaminophen, codeine 8 mg, caffeine (tylenol NO1), ibuprofen, naproxen sodium
ex of reclassified OTC drugs: histamine blockers
cetrizine (reactine), diphenhydramine hcl (benadryl), famotidine (pepsid)
ex of reclassified smoking deterrents
nicotine gum (Nicorette), nicotine transdermal patch (Nicoderm)
ex of reclassified topical meds
clotrimazole (canesten), miconazole nitrate (micazole), minoxidil (minox)
advantages of OTCs
- convenience
- decreased health care costs when drug is paid out of pocket
disadvantages of OTCs
- can postpone treatment of serious disorders
- may delay treatment of serious disorders
- can relieve symptoms but not the cause
potential hazards of OTCs
toxicity, interactions with prescription meds, misuse
what is the daily max of acetaminophen
4000 mg. too much can cause hepatic toxicity
use of natural health products
- boost the immune system
- therapeutic agents for treatment and prevention of disease
- adjunct therapy to support conventional pharmaceutical therapies
dietary supplements
vitamin and mineral supplements
herbs
teas, oils, ointments, dried extract
homeopathy
microdose of substance thought to cause disease.
other examples of natural health products
traditional chinese, ayurvedic, other traditional medicines, probiotics, amino acids and essential fatty acids
natural health products are regulated by
natural and non-prescription health products directorate. NNHPD
what percent of Canadians regularly take vitamins, minerals, herbal products and homeopathic meds
71%
NCCAM stands for
national center for complementary and alternative medicine
commonly used herbal products
aloe, feverfew, ginko biloba, goldenseal, st johns wort, valerian, chamomile, echinacea, garilic, ginseng, hawthorn, ginger
conditions treated with herbal products
anxiety, cold and cough, depression, headache, insomnia, ulcers, PMS, arthritis, constipation, fever, infection, stress, intestinal disorders
interactions with chamomile
increased potential for bleeding with anticoagulants
interactions with cranberry
decreased elimination of many drugs excreted by the kidneys
interactions with echinecea
interference or counteraction to immunosuppressant drugs and antivirals
interactions with evening primrose
antipsychotic drugs
interactions with garlic
interference with hypoglycemic drugs and warfarin sodium
interactions ginkgo biloba
increase bleeding with anticoagulants and antiplatelets
interactions ginger root
at high doses possible interference with cardiac, antidiabetic, or anticoagulants
interactions with grapefruit (decreased metabolism)
decreases the metabolism of drugs used for erectile dysfunction, estrogens and some psychotherapeutic drugs
interactions with grapefruit (increased actions)
increases the risk of toxicity of immunosuppressants, statins and some psychotherapeutic drugs. increases intensity and duration of caffeine
interactions with hawthorn
can lead to toxic levels of cardiac glycosides
interactions with kava
increased effects of barbiturates and alcohol
interactions with saw palmetto
may change the effects of hormones in oral contraceptive drug patches or hormonal replacement therapies
interactions with st johns wort
can lead to serotonin syndrome if used with other serotonergic drugs, strong CYP 3A4 inducer resulting in decreased concentration of many drugs
interactions with valerian
increased CNS depression if used with sedatives
nursing implications: assessment
- assess med history: all meds used including OTC, prescription, natural health
- assess levels of education
- assess info specific to products
- system functioning
- interactions
T or F manufacturers of herbal products are not required to prove saftey and effectiveness
true