You should not tilt your head back to swallow tablets or capsules, as this is not the optimal method.

noli's read

This recommendation is based on studies of swallowing mechanics published in journals such as 'Patient Preference and Adherence'. Research shows that the 'pop-bottle' technique (for tablets) or the 'lean-forward' technique (for capsules) facilitates passage into the esophagus. Tilting the head back can sometimes narrow the pharyngeal passage or cause the dosage form to be oriented incorrectly. The 'lean-forward' technique allows the capsule, which is naturally lighter than water, to float toward the back of the throat, facilitating swallowing. This is a biomechanical observation validated by clinical tests comparing different body positions. The advice is therefore based on a better understanding of functional anatomy rather than simple habit. This is not a medical revolution, but an effective ergonomic tip to avoid blockages or unpleasant sensations.

the sources

No named source held this one up — that absence is part of the verdict.