Assembly language programmers must be aware of hidden side effects — instructions that modify parts of the processor state which are not mentioned in the instruction's mnemonic. A classic example of a hidden side effect is an arithmetic instruction that implicitly modifies condition codes (a hidden side effect) while it explicitly modifies a register (the overt effect). One potential drawback of an instruction set with hidden side effects is that, if many instructions have side effects on a single piece of state, like condition codes, then the logic required to update that state sequentially may become a performance bottleneck. The problem is particularly acute on some processors designed with pipelining (since 1990) or with out-of-order execution . Such a processor may require additional control circuitry to detect hidden side effects and stall the pipeline if the next instruction depends on the results of those effects.
• Patient may experience flatulence, insomnia, headache, nightmares, constipation, dry mouth, abdominal pain, change in taste, common cold symptoms, or loss of strength and energy. Have patient report immediately to prescriber signs of depression (suicidal ideation, anxiety, emotional instability, or confusion), hallucinations, psychosis, anxiety, agitation, mood changes, behavioral changes, signs of severe cerebrovascular disease (change in strength on one side is greater than the other, difficulty speaking or thinking, change in balance, or vision changes), signs of a heart attack (angina; pain in arms, back, neck, jaw, or abdomen; shortness of breath; cold sweats; severe dizziness; passing out; or severe nausea or vomiting), shortness of breath, severe nausea, vomiting, seizures, confusion, sleepwalking, or signs of Stevens-Johnson syndrome/toxic epidermal necrolysis (red, swollen, blistered, or peeling skin [with or without fever]; red or irritated eyes; or sores in mouth, throat, nose, or eyes) (HCAHPS).