In the process of sugar coating, the tablet core is usually sealed with a thin film of a poorly water soluble polymer to protect the tablet core and its contents from the aqueous fluids in the gastrointestinal tract. *

he absorption of some basic drugs (eg. Cinnarazine) which has limeted aqueous solubility increased in the presence of food due to
the secretion of Hcl

Viscosity of the solution is one of the factors
associated with the formulation of aqueous solutions that can influence drug bioavailability.

Cold bevarages tend to decrease the gastric emptying time in healthy persons.

Gastro-resistant coatings should preferably begin to dissolve at pH----
-in order to ensure the availability of drugs in the proximal region of the small intestine.

If we do a comparison of the effects of different types of food intake on the serum griseofulvin levels following 1 gm oral dose, greatest level seen with:

The Noyes-Whitney equation shows that dissolution in a flask may be influenced by the physicochemical characteristics of the drug, the formulation,
and the nature of the absorption membrane

When a drug is formulated as a powder filled capsules there is an enormous reduction in the effective surface
area of the drug.

Chloramphenicol concentration in the body
was found to be dependent on the percent of b-polymorph
inthe suspension.*

Erythromycin has a pH- dependent stability
profile; it decomposes rapidly in alkaline medium.

Some effects of food on the bioavailability of a drug from adrug product include:

Enteric-coated tablets:

Factors associated with
the formulation of
aqueous suspension dosage forms that can influence the bioavailabilities of drugs: (all are True except)

According to the mechanism of drug absorption, if mannitol is dosed orally, it would be absorbed minimally and only throughh

The percent dissolved of erythromycin dihydrate is larger compared to the unhydrous form in phosphate buffer pH 7.4

Reduction of the particle size by milling to
micronized form improve the oral absorption of many steroids and drugs with low aqueous solubility

or drugs that act as weak electrolytes, such as weak acids and bases, the extent of-------
influences the drug's diffusional permeability.

Addition of disintegrant to the formulation ensure
rapid disintegration of the tablet and release of the drug.

The permeability of a drug at the absorption site into the systemic circulation is intimately
related to:

Gl motility tend to move the drug through the alimentary canal, so the drug may stay at the absorption site