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Testosterone Suspension

Pharmaceutical Name: Testosterone (aqueous suspension)
Chemical structure: 4-androstene-3-one,17beta-ol
Molecular weight of base: 288.429
Anabolic/Androgenic Ratio: 100/100
Active Life: less than 24 hours

Testosterone suspension is gram for gram is the most powerful testosterone available. Suspension is not only non-esterified, its not even dissolved in oil the way esterified compounds are. It is an aqueous (water) suspension. Where 100 mg of a testosterone ester equals 100 mg minus the weight of the ester, 100 mg of testosterone suspension contains an actual 100 mg of the steroid (1).

However, the primary advantage of an individual choosing to use testosterone suspension in their cycle over another type of testosterone is that the anabolic effect of this testosterone will be realized much more quickly than could ever be expected with an esterified compound. The active life of suspension is such that it will only be active in a user's system for less than 24 hours replacing all natural testosterone production, along with the added amount that an anabolic steroid user desires. Obviously this should be huge increase over the endogenous testosterone level of the average male, which can range from 2.5 to 11 mg per day in nearly all cases (2,3).

By running suspension, users should feel the effects of the compound within days of first administration of the drug. Strength and size increases, along with possible negative side effects, should be noticeable quite quickly. The rapid onset of side effects is also one of the reasons why the compound is usually used only by those that have plenty of experience with anabolic steroids.

Use and Dosing Testosterone Suspension>

Due to the fact that the active life of suspension is less than 24 hours, the majority of users will inject twice per day. However, anecdotally users have found that daily or even injections every other day, along with other esterified testosterone compounds, have resulted in gains in mass while not resulting in a dramatic increase in the negative side effects related to the drug. However despite this, to maintain moderately consistent blood levels of the compound it should be administered twice per day.

Like all testosterone compounds, dosages vary depending on the needs and experience of the individual user. Large doses may be uncomfortable for some as many users have complained of "knotting" in areas that are injected into. However, due to the frequent injection schedule only those users that are administering extremely large doses will have to endure this for the most part, although there are anecdotal reports of muscle knotting occurring even at relatively small doses.

Since suspension by it's very nature is a water-based compound, many of those who use it complain of some problems regarding needle clogging when both drawing the compound from the vial as well as during the actual injection. This of course is dependent on the type and/or brand of suspension an individual is using, with some being easier to draw and inject than others. However for those that have difficulty, they may find it necessary to use a larger gauge of needle than with some other compounds. This should alleviate these problems for the most part.

Risk an Side Effects of using Testosterone Suspension>

Since testosterone suspension is indeed simply another form of injectable testosterone, the side effects associated with it are for the most part those commonly encountered with any type of testosterone compound. For more specific information about these see the testosterone enanthate profile in this forum. In this section the side effects, and the characteristics of them, that are unique to testosterone suspension alone will be dealt with.

Testosterone is, next to nandrolone, the most suppressive drug of natural testosterone production (4). Side effects may be a little more pronounced with suspension than with testosterone esters due to the speed with which the compound's effects are realized. This includes the fact that endogenous testosterone production will be quickly reduced and shut down when using suspension. This can often reach the point of severe testicular atrophy, even in those individuals that see little to no atrophy when running other compounds, including other forms of testosterone. This often necessitates the use of human chorionic gonadotropin (HCG) to avoid harsher than necessary difficulties.

Like all testosterones, androgenic side effects will also become evident with use of suspension. Since testosterone converts to DHT one should expect to possibly endure oily skin, acne, and body and/or facial hair growth, along with exasperating male pattern baldness if a predisposition exists (3). Again, some users anecdotally report that these effects are often more pronounced with suspension than with any other type of testosterone and they will likely appear much more rapidly than with other compounds due to the lack of an ester.

Even those women who run low doses of testosterone will likely find it unnecessary to venture into attempting a cycle of testosterone suspension. Due to the frequent injection schedule that the compound requires, and the low doses that most women run when cycling testosterone, it become counterproductive to be shooting such a small amount of a compound so frequently when other more convenient drugs are available. However, if a female does attempt to run testosterone suspension, the usual virilizing side effects would be expected (as discussed in the testosterone enanthate/cypionate profile else where in this forum).


1. Llewellyn, William, Anabolics 2004, 2003-4, Molecular Nutrition, pp. 163-5

2. Schulte-Beerbuhl M., Nieschlag E., Comparison of testosterone, dihydrotestosterone, luteinizing hormone, and follicle-stimulating hormone in serum after injection of testosterone enthanate or testosterone cypionate. Fertility and Sterility 33 (1980) 201-3.

3. Cantrill JA, Dewis P, Large DM et al. Which testosterone replacement therapy? Clin Endocrinol (oxf) 21 (1984) 97-107

4. Toth M., Zakar, T. Relative binding affinities of testosterone, 19-nortestosterone and their 5-alpha reduced derivatives to the androgen receptor and to other androgen-binding proteins: A suggested role of 5alpha-reductive steroid metabolism in the dissociation of "myotropic" and "androgenic" activities of 19-nortestosterone. J Steroid Biochem 17 (1982) 653-60

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