Hi,
As already advised, he should be seen by a doctor to get the correct answer. However, the following point may be of importance :
Whenever a hormone supplement is taken, the natural production of the hormone is likely to reduce due to the negative feed back in the system. So, when the supplementation is stopped, the concerned hormone levels falls to a very low level and it takes some time ( few months) for the body to go back to its initial natural levels. In the present case, the level is still within limits, so I guess it would go back to the initial level sooner.
Any how, better to seek a medical advice in this regard.
Solace
Don't you think you should take him to the doctor?