When used in high doses, a small amount of the medication is absorbed into the bloodstream and some side effects beyond the mouth and throat may develop. The most likely to be encountered are easy bruisability of the skin and suppression of the adrenal glands. The significance of adrenal gland suppression is discussed in further detail in the pamphlet entitled Asthma and Steroids in Tablet Form , prepared by the Partners Asthma Center. The risk from the long-term use of inhaled steroids in terms of hastening thinning of the bones (osteoporosis) is currently being studied. However, it is widely agreed that any risk that may be discovered will be far less than that resulting from use of steroids in tablet form in doses needed to achieve the same control of asthma.
Another potentially disturbing complication where neuromuscular blockade is employed is ' anesthesia awareness '. In this situation, patients paralyzed may awaken during their anesthesia, due to an inappropriate decrease in the level of drugs providing sedation and/or pain relief. If this fact is missed by the anesthesia provider, the patient may be aware of their surroundings, but be incapable of moving or communicating that fact. Neurological monitors are increasingly available that may help decrease the incidence of awareness. Most of these monitors use proprietary algorithms monitoring brain activity via evoked potentials. Despite the widespread marketing of these devices many case reports exist in which awareness under anesthesia has occurred despite apparently adequate anesthesia as measured by the neurologic monitor. [ citation needed ]
Use of QVAR with a spacer device in children less than 5 years of age is not recommended. In vitro dose characterization studies were performed with QVAR 40 mcg/actuation with the OptiChamber and AeroChamber Plus ® spacer utilizing inspiratory flows representative of children under 5 years old. These studies indicated that the amount of medication delivered through the spacing device decreased rapidly with increasing wait times of 5 to 10 seconds as shown in Table 2. If QVAR is used with a spacer device, it is important to inhale immediately.