In part that is because any drug can produce side effects.
But the most important problem is this: if something has a biological effect, it will also produce side effects.
It turned out to produce side effects in some women that included unpredictable bleeding, weight gain and hair loss, and it was sometimes difficult to remove.
Studies suggest that ephedrine can produce side effects that include anxiety, insomnia, hypertension, psychosis, kidney damage, dependency, heart attack, stroke and death.
Current medicines can control symptoms, but they cannot stop the disease from worsening, and they can produce side effects like uncontrollable movement.
Moreover, in the developed world, an unknown number of people might decline an AIDS vaccine out of concern that it might produce side effects that would not appear until years after the immunization.
Because they can also inhibit other biologically active forms, or isoenzymes, of phosphodiesterase (e.g., PDE-6, PDE-11), they have been known to produce side effects such as facial flushing, headache, and blurry or coloured vision.
Commands and reactions are further equipped with user-defined update functions to produce side effects on the global state.
On the other hand it can be concluded that DIBS-based stimuli can produce side effects if they are used for narrow-band synthesis.
