In dentistry, pharmacology is taught at the beginning of university studies, while prescribing drugs is mainly needed in later clinical practice, which creates a time gap preventing the transfer of knowledge. A cross-sectional study tested a card-based visual pharmacology resource (Odontomecum in Cards) based on microlearning and just-in-time learning during clinical rotations. 100 dental students (39 fourth year and 61 fifth year) participated in the survey. After using the cards, confidence in prescribing was higher in the entire sample and in both years. Students rated the resource as highly useful and easy to use in a clinical setting, and most would recommend it to peers. Qualitative feedback emphasized the practicality of the cards and suggested improvements in accessibility and format. The resource was well received and associated with increased prescribing confidence. The findings support the value of microlearning and just-in-time approaches in dental pharmacology.