Viagra - Zyvex Pharmaceuticals

Frequently Asked Questions

• Why do anabolic steroids cause erectile dysfunction?

  Anabolic steroids cause erectile dysfunction through several different pathways, and the specific cause matters because not all of them respond to sildenafil. The most straightforward cause is running a cycle without a testosterone base: all anabolic steroids suppress the hypothalamic-pituitary-testicular axis and shut down natural testosterone production, leaving the body in a low-testosterone state if no exogenous testosterone is provided. Low testosterone directly impairs libido, erection quality, and the ability to achieve orgasm. A second common cause is estrogen imbalance - either too high (from aromatizing compounds with inadequate AI use) or too low (from aggressive AI use that crashes estrogen). Both ends of the estrogen spectrum impair erectile function, with low estrogen particularly affecting libido. A third cause is prolactin elevation from 19-nor compounds like nandrolone (Deca) and trenbolone, which suppress dopamine signaling in the brain - the same dopamine pathway involved in sexual arousal and the ability to achieve orgasm. A fourth cause specific to certain compounds like high-dose trenbolone is direct neurological effects including anxiety and mood disruption that reduce sexual desire at the psychological level.

• Will Sildenafil fix steroid-induced erectile dysfunction?

  Sildenafil fixes the vascular component of erectile dysfunction - it helps blood flow into erectile tissue and maintains the erection by inhibiting PDE5. It does not fix hormonal causes. If the problem is low testosterone from running no testosterone base, sildenafil may allow an erection to occur when desire is present, but it cannot restore the libido that low testosterone suppresses. If the problem is elevated prolactin from nandrolone ("Deca Dick"), sildenafil cannot restore dopamine signaling - cabergoline is the correct tool for that, with sildenafil potentially used as an adjunct. If the problem is crashed estrogen from over-AI use, sildenafil cannot restore estrogen-dependent libido. The practical approach is to first audit the hormonal state of the cycle - confirm testosterone base is present and adequate, check AI dose against estrogen bloodwork, and add cabergoline if running 19-nor compounds - and then use sildenafil for the residual vascular component. Users who jump straight to sildenafil without addressing the hormonal root cause often find partial or no improvement.

• What is "Deca Dick" and will Sildenafil help?

  Deca Dick is the colloquial term for the erectile dysfunction and libido suppression caused by nandrolone-based compounds (Deca Durabolin, NPP) and to a similar degree by trenbolone. The mechanism is the 19-nor structure of these compounds, which produces significant progestogenic activity that elevates prolactin levels. Prolactin suppresses dopamine signaling in the brain, and dopamine is essential for the sexual arousal, desire, and reward circuitry. Elevated prolactin also impairs the mechanical ability to achieve orgasm and can cause anorgasmia even when erection is maintained. Sildenafil addresses the vascular and mechanical erection component but cannot touch the prolactin-dopamine pathway. If Deca Dick is primarily a libido and arousal problem - desire is absent, not just mechanical function - sildenafil will not restore it. If it is partly a vascular mechanical problem, sildenafil may improve erection quality even when the desire component is still impaired. The standard protocol for Deca Dick is cabergoline at 0.25-0.5 mg twice per week to suppress prolactin, started from the beginning of the nandrolone or trenbolone cycle rather than waiting for symptoms. Sildenafil can be used alongside cabergoline as an adjunct for the vascular component.

• What is the correct Sildenafil dose and how should I take it?

  The standard starting dose for most men is 50 mg taken 30-60 minutes before sexual activity. This is the dose most clinical studies identified as effective in the majority of the treated population with an acceptable side effect profile. If 50 mg provides insufficient effect after a fair trial (2-3 occasions), the dose can be increased to 100 mg, which is the maximum recommended dose. If 50 mg produces uncomfortable side effects such as severe headache, pronounced flushing, or significant blood pressure drop, the dose can be reduced to 25 mg. For bodybuilders using sildenafil pre-workout for vasodilation and muscle pump enhancement, 25-50 mg taken approximately 60 minutes before training is the typical protocol - the same blood pressure-lowering effect that concerns some users in a sexual context provides the vasodilation benefit in training. Take sildenafil on an empty stomach or with a light meal for the fastest and most reliable onset. A high-fat meal delays peak effect by about an hour and reduces the concentration reached. Avoid grapefruit entirely as it increases sildenafil blood levels unpredictably. Do not exceed one dose in a 24-hour period.

• Can I take Sildenafil with alcohol?

  Alcohol and sildenafil can be combined but the combination increases the risk of side effects and reduces effectiveness. Both sildenafil and alcohol lower blood pressure - sildenafil through PDE5 inhibition causing vasodilation, alcohol through its direct vasodilatory effects. The combined blood pressure reduction is greater than either compound alone and increases the risk of dizziness, lightheadedness, fainting, and falls, particularly when standing up quickly (orthostatic hypotension). Moderate alcohol consumption (1-2 drinks) with sildenafil is unlikely to cause serious problems in a healthy young man without cardiovascular disease. Heavy alcohol consumption (4+ drinks) substantially increases the risk of hypotensive side effects and also directly impairs erectile function through CNS depression and reduced peripheral blood flow - in other words, heavy alcohol makes it harder to achieve an erection independent of what sildenafil is doing. The practical recommendation is to minimize alcohol on occasions when you intend to use sildenafil, and never combine heavy drinking with sildenafil use.

• Sildenafil vs Tadalafil - which is better for steroid users?

  Both compounds address the same vascular mechanism through PDE5 inhibition, so neither is pharmacologically superior. The practical differences come down to duration and dosing pattern. Sildenafil (Viagra) works for 4-6 hours and must be taken 30-60 minutes before activity - it is purely on-demand. Tadalafil (Cialis) works for up to 36 hours and can be used either on-demand at 10-20 mg or daily at a low dose of 2.5-5 mg. For steroid users managing persistent on-cycle ED, many prefer tadalafil at 5 mg/day because the constant low-level PDE5 inhibition provides background vascular support without requiring timing around each occasion. It also provides persistent vasodilation that can enhance training pump throughout a cycle. For on-demand use only, sildenafil's shorter action window means it clears the system faster, produces fewer hours of lowered blood pressure, and has less potential for accumulation. Sildenafil also has a significant food interaction (high-fat meals delay absorption) while tadalafil does not. The choice is largely one of preference for on-demand vs continuous coverage, with tadalafil's longer half-life making it more forgiving of timing but also meaning its blood pressure effects persist longer.

• Can sildenafil be used as a pre-workout for pump?

  Yes, and this is a common off-label use in the bodybuilding community. Sildenafil's PDE5 inhibition prevents the breakdown of cGMP throughout the body's vascular system, not just in erectile tissue. The result is smooth muscle relaxation and vasodilation in skeletal muscle blood vessels during exercise, which produces enhanced blood flow to working muscles and more pronounced muscle pumps. At 25-50 mg taken 45-60 minutes before training, most users report noticeably enhanced pumps during resistance training. The effect is well-established enough that some pre-workout companies have attempted to mimic it through nitric oxide precursors (arginine, citrulline) that increase nitric oxide production rather than inhibiting the enzyme that breaks down the downstream messenger. The consideration for steroid users is blood pressure: anabolic steroids, particularly injectables, often raise blood pressure, and sildenafil lowers it. For users with already elevated blood pressure, the combination may actually be beneficial in normalizing it. For users with normal or low blood pressure, the combined effect could produce hypotension during intense training. Monitoring blood pressure before using sildenafil as a pre-workout is advisable, particularly on a high-dose AAS cycle.

• What drugs can never be combined with Sildenafil?

  Nitrates are the absolute contraindication with no exceptions. This includes prescription nitrate medications used for cardiovascular conditions - nitroglycerin (sublingual tablets, spray, transdermal patches), isosorbide mononitrate, isosorbide dinitrate - and recreational amyl nitrite, also called "poppers." Combining sildenafil with any nitrate compound causes a severe, potentially fatal drop in blood pressure through synergistic vasodilation that cannot be predicted or safely managed. This interaction is not dose-dependent in the sense of having a safe threshold - the combination is dangerous regardless of how much of either compound is taken. Other significant interactions to be aware of: alpha-blockers (used for blood pressure or prostate conditions) cause additive blood pressure reduction and increase hypotension risk; ritonavir and other HIV protease inhibitors dramatically increase sildenafil blood levels by blocking the enzyme that metabolizes it; ketoconazole and similar CYP3A4 inhibitors have the same effect. Grapefruit juice should be avoided for the same reason. Men taking any of these medications should not use sildenafil without medical supervision. Alcohol is not an absolute contraindication but substantially increases side effects as described above.