Based on available information, it is generally difficult to tell if a man is taking Viagra solely based on noticeable physical changes.
Identifying Viagra Use: Lack of Noticeable Signs
When wondering about the use of medications like Viagra, it's natural to look for outward signs. However, according to information available, there aren't going to be any noticeable changes that'll tell you he's using Viagra. This means that physical appearance, behavior, or other immediately observable cues are typically not reliable indicators that someone has taken the medication.
The effects of Viagra are primarily internal, related to blood flow that facilitates an erection when a man is sexually stimulated. Unlike some substances that might cause visible side effects or obvious behavioral changes, Viagra's presence is not usually detectable through casual observation.
In summary, you typically cannot tell if a man has taken Viagra by looking for noticeable physical signs or changes in his demeanor.