PETROGEN 
WYETH 
A non-irritating, highly penetrating and soluble medium 
for the administration of medicaments which ordinarily 
prove difficult of use because of their irritating properties. 
Petrogen is particularly well adapted for veterinary 
practice for the administration of iodine. 
I odine=Petrogen will cause no irritation or 
blistering, nor will its continued application result in a 
falling out of the hair, or cause any permanent staining. 
Iodine= Petrogen is indicated in all forms of 
sprains, stiff joints, shoulder lameness, swellings, bone 
enlargements, and all conditions where a stimulating action 
on the glands and blood-vessels is required. 
Iodine=Petrogen may be employed freely and 
indefinitely without producing the tendency to blister, 
which so often precludes entirely the use of the 
tincture of iodine. 
LITERATURE AND SAMPLES OF IODINE-PETROGEN, OR OTHER 
PETROGEN COMBINATIONS, WILL BE SUPPLIED ON REQUEST 
JOHN WYETH & BROTHER, Inc. 
PHARMACEUTICAL CHEMISTS, PHILADELPHIA 
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