What medicines can cause facial swelling?
Facial swelling refers to fluid accumulation in the facial tissues, explains MedlinePlus. The neck and upper arms sometimes become swollen as well. Many people experience adverse reactions to medications, but most side effects are not caused by an allergic reaction. For instance, aspirin can lead to asthma or nonallergic hives.
Sources: nlm.nih.gov, nlm.nih.gov