Chapter 6: Drug Formulations adn Patient Counseling Flashcards
Olanzapine formulations
IR tablet, ODT, short-acting injection, long-acting injection
Ondansetron formulations
IR tablet, oral solution, ODT, oral film, short-acting injection
Suffixes for long acting formulations:
XL, XR, ER, LA, SR, CR, CRT, SA, TR, cont
Osmotic Release Oral Systems (OROS)
Provides fast drug delivery, followed by an extended release.
Water from the gut is absorbed into the delivery system through osmosis, which increases the pressure inside and forces the drug out through a small opening.
The tablet/capsule shell may be visible in the patients stool (ghost tablet/capsule), but the drug has been released
Reasons for long-acting formulations
Drugs may be designed to release slowly to avoid nausea or to provide a long-duration of action. Providing a smooth level of drug release over time reduces high “peaks”, which reduces side effects and provides a safe level of drug over the dosing interval
Counseling for long-acting formulations
Do not crush or chew any drug that is in a LA formulation. It could release all of the medication at once, and a fatal dose could be released.
Is shaking required for suspensions or solutions?
Required for suspensions to redisperse the medication prior to administration.
What type of chewable tablets are popular for adults?
Chewable calcium tablets
Lozenges/troches
Used to treat a condition in the oral mucosa; the drug is held in the mouth while the troche slowly dissolves
Mycelex
Clotrimazole, for oral thrush
What is the most common cause of dysphagia?
Paralysis of the throat muscles from stroke
What are reasons for ODT formulations?
Dysphagia, children, nausea, vomiting, non-adherence
Patient counseling for granules, powders, or capsules that can be opened or sprinkled
Do not chew any long-acting pellets or beads
If capsule contents are mixed into liquid or food, do not let the mixture sit for too long (take within the time directed)
Do not add to anything warm or hot.
Singulair-motelukast granules instructions
In 5 mL of baby formula or breast milk or in a spoonful of applesauce, carrots, rice, or ice cream
Vyvanse granules instruction
In water, yogurt, or orange juice
Sorbitol metabolism
Produces gas, cramping, and bloating in sensitive patients, including those with IBS
Phenylalanine
Used in many ODT, chewable, and granule medication formulas. Is a dangerous sweetener for those with phenylketonuria (PKU), a genetic deficiency in which the enzyme that degrades phenylalanine is absent.
Lactose
Most common excipient in drug formulations. It many be an issue in patients with lactose intolerance
Subcutaneous injections
Patients can self-administer
Examples- naloxone, Imitrex, insulins
SC administration is used for rapid effect or for drugs that would degrade or not be absorbed if given orally.
Long-acting IM injectinos
Improve adherence or to decrease the need for more frequent injections.
IV Injections
Bypasses the oral route
Fast response, avoids drug loss due to N/V
Glatiramer
Room temp stability
Injection location
Frequency
Room temp stability- 30 days
Injection location- Abdomen, arms, hips, thighs
Frequency- daily or three times per week
Etanercept
Room temp stability
Injection location
Frequency
Room temp stability-14 days
Injection location- Thigh (preferred), abdomen, upper arm
Frequency- once or twice weekly
Humira (adalimumab)
Room temp stability
Injection location
Frequency
Room temp stability- 14 days
Injection location- Abdomen, thigh
Frequency- Every other week
Certolizumab
Room temp stability
Injection location
Frequency
Room temp stability- prefilled syringes up to 7 days
Injection location- abdomen, thigh
Frequency- every 2-4 weeks
Golimumab
Room temp stability
Injection location
Frequency
Room temp stability-up to 30 days
Injection location- Thigh, lower abdomen below navel, upper arm
Frequency- Monthly