dicyclomine is a medication that relieves spasms in involuntary smooth muscles like those that line the gastrointestinal tract several companies produce dicyclomine in capsule syrup tablet and intramuscular injection formulationsicyclomine is a medication that relieves spasms in involuntary smooth muscles like those that line the gastrointestinal tract several companies produce dicyclomine in capsule syrup tablet and intramuscular injection formulations