Testosterone Propionate (100 mg/ml) 10 x 1ml (Primus Ray)

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Testosterone Propionate 100 mg/ml is injectable Testosterone Propionate manufactured by Primus Ray. It comes in 10 x 1ml ampoules.

Testosterone Propionate is similar to enanthate, cypionate, and sustanon. However, compared to enanthate or cypionate, propionate is a much shorter ester and will release more quickly into the bloodstream.

How to use Primus Ray Testosterone Propionate

An injection schedule of every third day is about the longest you would want to perform using Testosterone Propionate to achieve good results. For best results – daily injections are more suitable given the nature of this agent. Peak propionate levels take place after 24-36 hours and taper down from there.

Testosterone Propionate is also a relatively painful steroid to inject with users complaining that the same spots become aggravated with additional injections which require injecting in several different places for prevention of this pain. The injection site may become irritated and users have complained of long lasting pain caused by the injections.

For these reasons, Testosterone Propionate is not such a good idea for the first time steroid user, however, enanthate and cypionate are not without their share of complications and all factors should be assessed before beginning with any steroid cycle.

Primus Ray Testosterone Propionate 100 mg/ml dosage

Since Testosterone Propionate is a short acting steroid, most Testosterone Propionate users will want to use 50-100 mg every day to every other day. As mentioned earlier, on injection schedules less frequent than that, risks of not optimizing the steroid are possible. Since spot injections can become sore and irritated, rotating injection sites is advised to prevent pain or discomfort.

Primus Ray Testosterone Propionate effects

Primus Ray Testosterone Propionate has the same benefits of every other testosterones along with the advantage of being fast acting. Another advantage of Testosterone Propionate when compared to other steroids is that the level of water retention and water based gains on cycle are lower when compared to counterparts such as Testosterone enanthate or Testosterone cypionate.

Primus Ray Testosterone Propionate side effects

Side effects such as acne, water retention, high blood pressure, aromatization, DHT conversion and decrease of normal HPTA function are possible with the use of Primus Ray Testosterone Propionate. Since propionate aromatizes, having ancillary drugs such as nolvadex or clomid on hand during cycle is a smart idea for preventative measures. As a general rule of thumb, you should always have ancillary drugs on hand before starting any cycle.

Primus Ray Testosterone Propionate 100 mg/ml quick facts

  • Chemical Name: 4-androstene-3-one, 17beta-ol
  • Testosterone base + Propionate ester
  • Molecular Weight (base): 288.429
  • Molecular Weight (ester): 74.0792
  • Formula (base): C19 H28 O2
  • Formula (ester): C3H6O2
  • Melting Point (base): 155
  • Melting Point (ester): 21C
  • Manufacturer: Primus Ray
  • Effective Dose (Men): 350-2000mg+ week.
  • Effective Dose (Women): 50-100mgs/week
  • Active life: 2-3 days
  • Detection Time: 2-3 weeks
  • Anabolic/Androgenic ratio: 100/100

Specification: Testosterone Propionate (100 mg/ml) 10 x 1ml (Primus Ray)

Product name

Testosterone Propionate


Primus Ray

Common name


Effective substance

Testosterone Propionate


100 mg/ml


10 x 1ml ampoules

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