Many devices are based on hydrostatics such as barometers and manometers, i.e., determine pressure through measurement of a column (or columns) of a liquid using the pressure variation with elevation equation for an incompressible fluid.
Tenex is the brand-name version of a generic drug called guanfacine. This drug is typically prescribed to treat high blood pressure. Itâs not approved by the Food and Drug Administration (FDA) to treat ADHD. However, your childâs doctor may still prescribe Tenex to treat ADHD.
1 Tenex, a brand name for the medication guanfacine, a sympatholytic used to treat hypertension, ADHD and Anxiety.  Tenex, a brand name for .22 LR ammunition manufactured by Eley Limited and widely used in high level competition such as the ISSF World Cup and Olympic Games.