Dec 31, 2015
A headache is an ambiguous side effect because there are so many different things that can cause headaches. Hormones are a big culprit of this. Blood pressure medications can too.
For someone with chronic high blood pressure, the higher pressure becomes the body's new "normal". Once medication starts to bring it down, even though the pressures are within a normal range, the body will experience symptoms of low blood pressure.
Irritability, nervousness, jitteriness, or moodiness can be a side effect of amphetamines (used for ADD) or cold medicines (i.e. pseudoephedrine).
A factoid about ADD/ADHD: the focus and attention area of the brain are underactive, so a stimulant helps it be more active so improve focus.
The biggest complaint people have from any stimulant is the inability to sleep at night. Just need to make sure it's taken early enough in the day so it wears off in time for bed.
In this case, we rarely want you to keep taking the medication if these side effects happen. For example, cholesterol medications (i.e. statins, and fibrates) and quinolone antibiotics (Levaquin, Cipro, Avelox). The quinolones have a rare but serious side effect of tendon rupture; it is painful and permanent.
Tendons: the connective tissue that anchors muscles to the bones.
Osteoporosis medications can lead to bone pain - since their job is to cause changes in the way the bones are built and rebuilt, it's not uncommon to feel something. But usually temporary.
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Music Credits: "Radio Martini" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/