1 If you are pregnant and have never had chickenpox, and you get chickenpox during the:  First half (about 20 weeks) of your pregnancy, there is a very slight risk (0.4% to 2%) for birth defects or miscarriage.
Certain medications can also cause leg cramps. These include: 1  High blood pressure drugs. 2  Statins to treat high cholesterol. 3  Medications for chronic obstructive pulmonary disease (COPD).
Treating leg cramps. If the cause of your leg cramps is known, it may be possible to treat the underlying cause. For example, secondary leg cramps that are related to liver disease are caused by high levels of toxins in the blood which trigger muscles spasms.xercises during cramps. During an episode of leg cramp, stretch and massage the affected muscle. For example, if the cramp is in your calf muscle: 1  Straighten your leg and lift your foot upwards, bending it at the ankle so that your toes point towards your shin.