Timing of Medications
Onset
Onset = time of the drug to start working within the body
Timing of Medications
Peak
Peak: time when the drug is working its best
Timing of Medications
Duration
Duration: the length of time the drug has a high enough concentration to be “therapeutic”
Timing of Medications
Half-Life
Half-Life: the time it takes for ½ of the drug to be eliminated
Timing of Medications
General rule of a drug’s ½ life
The longer the ½ lifef, the more medication is still in the body
(longer effect)
Goals of Drug Therapy
Reasons for Treatment with Medications
Have a problem now that needs treatment, meds will cure problem
Acute needs
Reasons for Treatment with Medications
On-going need
Ex. to keep BP under control, birth control, etc.
Maintenance needs
Reasons for Treatment with Medications
Add to body’s actions
Ex: insulin, vitamins
Supplemental needs
Reasons for Treatment with Medications
Keep the patient comfortable, not expecting a cure
Palliative needs
Reasons for Treatment with Medications
Preventative medications
ex: antibiotics for surgery, birth control
Prophylactic needs
Monitoring Medications
The more medications a patient has in his/her system at once the _______(1)_____ chance of drug _____(2)_____!
Monitoring Medications
Drug interactions can be _____(1)_____, ______(2)_____, or _____(3)_____.
Monitoring Medications
Adverse Drug Effect/ Side Effect
Unwanted effects, produced by the therapeutic level of the drug
Monitoring Medications
Characterisitics of Adverse Effects/ Side Effect
Monitoring Medications
Toxic Effects/ Poisoning
Avoidable side effect because the dose was too high
Monitoring Medications
Characteristics of Toxic Effects/ Poisoning
Monitoring Medications
Additive Effects
Two medications with similar actions given together
Monitoring Medications
Characteristics of additive effects
Monitoring Medications
Synergistic Effects
Two drugs given together that makes the effect greater than if alone
Monitoring Medications
Characteristics of synergistic effects
Monitoring Medications
Anatagonistic Effect
Two drugs given together work against each other so the effect is less than expected
ex: Alcohol and “speed”
Monitoring Medications
Incompatibility
Two drugs given (often mixed in an IV or syringe) together reach chemically to deteriorate the drugs
Monitoring Medications
Characteristics of incompatibility