The use of anabolic steroids will suppress natural testosterone. The rate of suppression is dependent on the steroid in question, but in the case of Oxymetholone it is enough to warrant the use of exogenous testosterone. This will actually hold true with most anabolic steroids. Those who supplement with Anadrol and forgo exogenous testosterone therapy will fall into a low testosterone condition. Not only is this a condition that comes with numerous bothersome symptoms, it is an extremely unhealthy state. The form of testosterone you choose when using Anadrol is of no consequence, however, you should ensure you are applying enough to provide what the body needs.
Once the use of Anadrol and all anabolic steroids has come to an end and all the exogenous hormones have cleared your system natural testosterone production will begin again. This is assuming there was no prior existing low level state. It also assumes no damage was done to the HPTA during supplementation due to improper practices. While natural testosterone production will begin again on its own, it will not be fast. It is generally recommended that the individual begin a Post Cycle Therapy (PCT) treatment plan following anabolic steroid use . This will encourage natural testosterone production and speed the healing process up. It will not automatically return you to your previous natural high level on its own; that will take some time. However, it will ensure you have enough testosterone in your body to function properly while your levels continue to naturally rise.
This can be countered to an extent. You can increase the dosage towards the middle and later parts of taking it to increase the positive effects. You can also take a period of time away from the drug, cycling off for a bit to give your body time to recover before getting back to it again. Be aware that the more you take a day, the less results you will get added to through the additional dosage. So for example, taking 50mg a day adds a lot. Adding 50mg a day improves the results, but not by much. Adding 50mg more for 150mg a day adds slightly more, but it is typically not worth the negative side effects to your health for only marginal improvements. Studies conducted on the drug helps to back up this assertion, postulating that 100mgs/day is perfect for Anadrol cycling.