I think you need to clarify which drops you are referring to.
If you are looking for something to help you sleep, make sure its an indica dominant strain, and then experiment with dosage and application. If you find tinctures are not working for you, perhaps they are not strong enough. You might try and edible, or vape pen with a stronger indica strain.
In general, edibles are recommended for sleep as they take longer to kick in, and may stick around longer (than vaping or a tincture) and thus help you not only fall asleep, but stay asleep longer. For many people, the issue with insomnia is one of staying asleep, and for this reason I recommend an edible.
Be careful of the dosage however, until you are sure of your response.
Hope that helps.