Suppositories Flashcards Preview

Pharmaceutics Spring 2016 > Suppositories > Flashcards

Flashcards in Suppositories Deck (36)
Loading flashcards...
1

Solid dosage forms intended for insertion into body ORIFICES refers to what?

Suppositories solid dosage form

2

Suppositories can have what 2 types of effects?

-Local effects
-System effects

3

What percent of RX/OTC products in the U.S. make up suppositories?

0.1%

4

T/F?
Suppositories are preferred for infants or those who CAN take medications orally.

False
CANNOT

5

Name the 3 types of suppositories

Rectal
Vaginal
Urethral

6

Name the supp. type
•typically, 1½”; CYLINDRICAL; tapered; 2 g if cocoa butter base; systemic and local

Rectal

7

Name the supp. type
•PESSARIES; globular, oviform, or cone-shaped; 5 g if cocoa butter base

Vaginal

8

Name the supp. type
•BOUGIES; slender, pencil-shaped; for insertion into male or female urethra (erectile disfunction)

Urethral

9

Advantages of Suppositories (5)

-Not exposed to harsh GI conditions
-Drugs irritating to stomach can be given
-Portal circulation is by-passed
-Convenient when patient unable to swallow
-Effective in cases of vomiting

10

What 2 factors affect suppository absorption?

- Physiology and Physicochemical factors

11

Which factors are describe below?
•COLONIC CONTENT- void= better absorption (enema)
•CIRCULATION ROUTE- 2 veins bypass liver
•PH/BUFFER CAPACITY- needs to be buffered at desired pH

Physiologic Factors

12

Which factors are described below?
•LIPID-WATER SOLUBILITY
• DECREASED PARTICLE SIZE- reduced= increased absorption or BA
•NATURE OF BASE

Physicochemical Factors

13

Name the two types of suppository base.

- Fatty or oleaginous (oily) base
-Water soluble and water-miscible bases

14

Cocoa butter and cocoa butter substitutes are considered what type of suppository base?

Fatty or oleaginous (oily) base

15

GLYCERINATED GELATIN (in urethral suppositories) and POLYETHYLENE GLYCOL (PEG greater than or equal to 1000) are considered what type of suppository base?

Water soluble and water-miscible bases

16

Why can a lipophillic drug combined with cocoa butter in a suppository lower the therapeutic effect of the drug?

The affinity between the oleaginous base and the lipophillic drug

17

T/F?
Cocoa butter base is a triglyceride obtained from the roasted seeds of THEOBROMA COCAO

TRUE

18

Which base is ideal in many ways because it has a m.p. at body temperature but can also show marks of polymorphism. Some drug may also lower its melting point.

Cocoa Butter Base

19

What is it considered when a cocoa butter suppository over heats and converts to a crystal and then converts to stable form over time.

Polymorphism

20

Name the 3 ways in which suppositories can be prepared.

1. Molding from a melt
2. Compression
3. Hand Rolling and Shaping

21

Molding from a melt (4)

- Suppository molds
-lubrication of mold
-calibration of mold
-preparation and pouring of melt

22

T/F?
When preparation and pouring of suppository melt, it should be done over a water bath w/ lease possible heat. The preparation should be stirred while pouring into a chilled mold.

true

23

Density Calculation for Suppository.

Wt. of drug divided by Wt. blank supp. - Wt. of medicated supp. + Wt. of drug

24

__________ suppositories include the following examples suppositories for pain, migraine, or for tranquilizers; or for local action as cathartic or hemorrhoidal suppositories

Rectal

25

What type of rectal suppositories are used for their laxative effect.

glycerin suppositories

26

Urethral Suppository: Alprostadil (4)

-Single use for delivery to male urethra
-Drug suspended in PEG 1450 to form a microsuppository
-Administered by applicator for erectile dysfunction
-Each system is individually foil packaged

27

Which type of suppository is typically used for infections or contraception and is often buffered to an acidic pH?

Vaginal

28

What is replacing vaginal suppositories?

Vaginal tablets/inserts

29

Progesterone suppositories with micronized powder in PEG base often compounded describes what type of suppository?

Vaginal

30

Typically, ____________ suppositories are individually wrapped in foil or plastic or placed in divided cardboard box

cocoa butter

31

____________ suppositories packaged in tightly closed glass containers

Glycerin or glycerinated gelatin

32

T/F?
Suppositories NEED refrigeration.

-FALSE
MAY NEED

33

Examples of local effect suppositories? system?

local: local anesthetics, vasoconstrictors, analgesic
system: sedative or tranquilizers

34

What is a disadvantage of suppositories?

drug absorption may be erratic; not reproducible

35

T/F There is almost no buffering in the rectum.

TRUE

36

Cocoa butter substitues do not have the same problems as cocoa butter such as? (2)

-polymorphism
-rancidity