Download - Medication Routes and Dosage Formulations
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Routes and Formulations
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Reasons for Different Routes of Administration
Ease of administration– Convenience/Compliance
Rate of onset– Rapid/slow onset of action desired
Duration of action– Rapid/Prolong the duration of action
Site of action– Target drug delivery to a specific site
Preferred route is unavailable
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Enteral Parenteral
Anything involving the ALIMENTARY tract
– Mouth to rectum
Oral (po) Rectal (pr) Sublingual (sl) Buccal
Anything that is outside of or beside the alimentary tract
Drugs administered that bypass the GIT
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Oral (PO) Rectal (PR)
Safe, easy to administer Convenient, most economical Usually painless
Erratic absorption Stomach irritation Slow onset Patient must be conscious
No GI irritation Useful for unconscious or
vomiting patients Useful for treating conditions
of the rectum
Inconvenient, unliked More expensive Erratic absorption Slow onset
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Sublingual & Buccal
Convenient, safe to administer Rapid absorption, no GI upset
Short acting, possibly unpleasant taste Limited number of drugs available this way Patient must be conscious
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Solid Oral Formulations
Tablets– Sugar or film coated– Repeat-action
Sustained release (SR) Controlled release (CR) Enteric coated
– Chewable– Effervescent salts– Lozenges/troches
Capsules Bulk powders
Composition– Active drug– Inactive ingredients (inert)
Diluents Disintegrant Binder Lubricant
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Liquid Oral Formulations
Solutions Syrups Elixirs Spirits Tinctures Suspensions Emulsions Gels
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Pouring Liquids
Left side– Apothecary units
Right side– Metric units
Meniscus– Error of parallax– Eye level
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Meniscus
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Parenteral Route
Intraocular– Ophthalmic– Conjunctival
Otic Intranasal Inhalation Dermal (Topical) TransDermal
Vaginal (PV) Urethral Intra-dermal (ID) Subcutaneous (SQ) Intravenous (IV) Intramuscular (IM)
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Ophthalmic Formulations
Administration– Dropper– Ointment (ung)– Ocusert
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Intranasal
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What Does Not Add UP?
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Oral Inhalation
Absorption Devices
– MDI– Spacer– Nebulizers
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Topicals
The Skin– Absorption
Products– Creams,Ointments– Gels, Lotions– Aerosols– Tapes– Trans-dermal systems
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Vaginal
Products Suppository Creams Solutions/Foams Tablets IUD
Urethral
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Injections
Usefulness– Rapid response– Pt unconscious/unco-op– Poor GI absorption
Disadvantage– Cost– Skilled personnel– Drug difficult to remove if
toxic effect
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Injection Routes
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Injection Routes
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IV Solutions
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IV with Piggyback (IVPB)
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Volumetric Infusion Controller
Infusion Pump
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Summary Slide
Reasons for Different Routes of Administration Enteral
– Oral (PO) Rectal (PR)– Sublingual (SL) and Buccal
Solid Oral Formulations Liquid Oral Formulations Parenteral Route