Koenig's Nervine Package Insert from 1950
Contents: 12 Fluid Ounces. Price $1.50.
Two teaspoonfuls contain Alcohol 5%, Sodium Bromide 5 grains, Potassium Bromide 3 1/2 grains, Ammonium Bromide 1 1/2 grains. Indicated as a sedative for the following Functional Nervous Disturbances: Common Nervousness, Nervous Headache. Nervous Irritability and Excitability, Sleeplessness and Restlessness.

Koenig's Nervine contained bromide salts

DIRECTIONS FOR USING—
DIRECTIONS: Adult Dose: 2 teaspoonfuls in a glass of water 3 times in 24 hours.
For Sleeplessness due to Nervousness: Best results may be obtained by taking one dose of Nervine after the evening meal and repeating one hour before retiring if needed.
NOTE: Do not exceed dosage recommended. If the symptoms persist or recur frequently, see your physician. Over-dosage or long continued use of bromides, or their use in presence of kidney diseases may be dangerous. If excessive drowsiness occurs during the day, reduce the dosage. If skin rash occurs, temporarily discontinue. Some individuals are more easily affected by the sedative action of Koenig's Nervine, and the dose should be regulated accordingly. For the conditions indicated it should not be necessary to use Koenig's Nervine continuously for long periods.
There are some persons who are particularly susceptible to bro¬mides and on these persons, their use may produce a rash. If such a rash appears discontinue the use of Koenig's Nervine until the rash disappears. The use of Koenig's Nervine may then be re¬sumed in a smaller dose and the dose gradually increased until the recommended dose can be tolerated.
A very large percentage of nervous disorders are due to a strained, overworked and irritable condition of the nervous system. Koenig's Nervine gives relief in these cases by its sedative action which accomplishes a quieting and soothing influence. It takes the strain and tension from the overtaxed nerves and helps them to function calmly.
Koenig's Nervine has been used successfully for over 50 years. For directions in foreign languages sec pages two and three.
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KOENIG LABORATORIES
Chicago, Illinois