How long do I keep Forth™ CBD tincture drops under my tongue? Customer Service August 08, 2019 15:28 Updated Follow Hold a tincture drop serving under the tongue for 30-60 seconds. But this may vary by individual. Related articles How do I take tincture drops? How should I store my Forth™ CBD tincture drops? What is Full Spectrum CBD? How do I contact Customer Service? What makes Forth CBD products so different from competitors? Comments 0 comments Please sign in to leave a comment.