It has been proven that side-effects caused by human growth hormone are rare even in strong doses, but no matter how infrequent, there are possible side-effects. These range from mildly uncomfortable to potentially fatal, but it is important to remember that side-effects are rare, no matter what disease or problem an individual might be using human growth hormone for and whether it is related to hormone growth deficiency or not.
When human growth hormones are injected, as in hormone growth therapy, side-effects may be more common. For this reason – among many others – injections should only be administered in close consultation with a physician.
Because human growth hormone is produced by the pituitary gland, one very possible side-effect is that, with human growth hormone supplements, therapy, or injections, the pituitary gland might become lazy. It may start receiving signals from the brain that, since the body is receiving enough human growth hormone, the pituitary does not need to produce as much as it is supposed to produce.
Patient who receive human growth hormone who do not truly need it may phase side-effects because, although it has been shown that large amounts of the hormone do not cause damage, when there are large amounts in an individual who produces enough HGH, the body cannot handle such high amounts. It is in these cases that a person runs a higher risk of developing diabetes and abnormal growth of bones and such internal organs as the heart, the kidneys, and the liver. Hardening of the arteries and high blood pressure are also possible.
Some of the more common side-effects can include abnormalities in some senses, such as touch, vision, and an increase in the prickling feeling common to limbs falling asleep. Dizziness and ear infections can also occur, as well as more complex ear problems in people suffering from Turner’s syndrome. Feelings of anxiety and migraines are also possible, as are changes – speeding or slowing – in an individual’s heart rate.
Many of the more frequent, possible side-effects are simply uncomfortable rather than fatal or even dangerous. These include – but are not limited to – back pain, coughing, constipation or diarrhea, depression, chills and fever, general feelings of malaise, loss of appetite or voice, sore throat, and symptoms that mimic those of the common cold.
More rare side-effects may include Carpal tunnel syndrome, chest pain, enlargement of breasts in male and female patients, joint and muscle pain, swelling, sleepiness, or insomnia. The most fatal side-effects are generally the rarest, and these include liver damage and acromegaly, which can increase a patient’s chances for heart attack. However, it is important to note that side-effects such as these usually occur only in patients who abuse human growth hormone and take far more than is advised.
There are some who say that there is an increase of cancer, namely leukemia, in people who have taken human growth hormone. However, studies are inconclusive when it comes to this and no true link between cancer and HGH has ever been successfully proven.