Medication is of course important but do not conclude that a pill dissolving in your stomach is necessarily more powerful than a healing thought in your mind.
The way to happiness: Keep your heart free from hate, your mind from worry. Live simply, expect little, give much. Scatter sunshine, forget self, think of others. Try this for a week and you will be surprised.
To cure worry, spend fifteen minutes daily filling your mind full of God. Worry is just a very bad mental habit. You can change any habit with God’s help.