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Finasteride and LGD-4033 Interaction: Avoid | Peptide Database

Compound Profiles Finasteride 5-Alpha Reductase Inhibitor | DHT Blocker for Hair Loss & BPH Finasteride competitively and selectively inhibits the Type II isoform of the enzyme 5-alpha reductase, which is predominantly found in hair follicles, the prostate, an

Written by Peptide Therapy Guide Editorial Team
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This guide cannot diagnose a condition or recommend a personal treatment plan. Discuss medical questions with a qualified professional.

Compound Profiles

Finasteride

5-Alpha Reductase Inhibitor | DHT Blocker for Hair Loss & BPH

Finasteride competitively and selectively inhibits the Type II isoform of the enzyme 5-alpha reductase, which is predominantly found in hair follicles, the prostate, and the liver. This enzyme converts testosterone into dihydrotestosterone (DHT).

LGD-4033

Selective Androgen Receptor Modulator | Lean Mass

LGD-4033 binds to the androgen receptor with high affinity (Ki of approximately 1 nM), functioning as a potent and selective agonist in muscle and bone tissue. Like other SARMs, its tissue selectivity is mediated by differential cofactor recruitment: upon binding to the AR, LGD-4033 induces a receptor conformation that preferentially recruits coactivators expressed in skeletal muscle and bone, while showing minimal agonist activity in androgen-sensitive tissues such as the prostate and skin.

Combined Organ Load

Shared Safety Flags

Frequently Asked Questions

Can I take Finasteride with LGD-4033?

Combining Finasteride with LGD-4033 is not recommended. Both Finasteride and LGD-4033 carry hepatotoxic risk. Combining hepatotoxic compounds significantly increases liver damage potential. If unavoidable, include liver support (TUDCA/NAC) and monitor ALT/AST frequently.

Is Finasteride and LGD-4033 safe together?

This combination carries significant risk. Both Finasteride and LGD-4033 carry hepatotoxic risk. Combining hepatotoxic compounds significantly increases liver damage potential. If unavoidable, include liver support (TUDCA/NAC) and monitor ALT/AST frequently. Consult a healthcare professional before combining.

What are the interactions between Finasteride and LGD-4033?

Both Finasteride and LGD-4033 carry hepatotoxic risk. Combining hepatotoxic compounds significantly increases liver damage potential. If unavoidable, include liver support (TUDCA/NAC) and monitor ALT/AST frequently. This assessment has 64% confidence and is inferred from pharmacological mechanism analysis.

How should I time Finasteride and LGD-4033?

Finasteride has a half-life of 6-8 hours (DHT suppression persists ~24 hours) and LGD-4033 has a half-life of ~24-36 hours. No specific timing requirements identified for this combination, but separating administration can help monitor individual effects.

This interaction analysis is compiled from research literature and pharmacological mechanism data. This assessment is inferred from known mechanisms and may not reflect all real-world outcomes. Always consult a healthcare professional before combining compounds.

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Research context

Read sources and limitations before applying a claim.

Research Indications

Combined BDNF support and neuritogenic effects may enhance memory formation and learning. NA-Semax component supports sustained attention and mental clarity. Multiple pathways protecting neural tissue from oxidative stress and damage. NA-Selank provides anxiolytic effects through GABA modulation. Immune-neuroendocrine support helps with stress resilience. Combined effects on neurotransmitter systems may improve overall mood. PE-22-28 promotes neural connectivity and neurite extension. Pinealon supports healthy sleep-wake cycles and pineal function.

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Community Research

Join others researching Cabergoline — share findings, ask questions, and learn from real experiences Cabergoline is a potent, long-acting dopamine D2 receptor agonist that powerfully suppresses prolactin secretion from the anterior pituitary. It is FDA-approved under the brand name Dostinex for the treatment of hyperprolactinemic disorders, including prolactin-secreting pituitary adenomas (prolactinomas). In the bodybuilding and performance enhancement community, cabergoline is considered an essential ancillary compound when running 19-nor anabolic steroids such as nandrolone (Deca-Durabolin, NPP) and trenbolone, both of which can elevate prolactin levels through progestogenic activity. Elevated prolactin causes a range of undesirable effects including gynecomastia (particularly the progesterone-mediated variant), sexual dysfunction (erectile dysfunction, decreased libido, anorgasmia), mood disturbances, and lactation. Cabergoline's exceptionally long half-life of 63-69 hours allows for convenient twice-weekly dosing, and its high affinity for D2 receptors makes it significantly more potent and better tolerated than the older dopamine agonist bromocriptine. Cabergoline exerts its effects by acting as a potent agonist at dopamine D2 receptors on lactotroph cells in the anterior pituitary gland. Prolactin secretion is tonically inhibited by hypothalamic dopamine acting on these D2 receptors, and cabergoline mimics this inhibitory signal with high affinity and prolonged duration. By activating D2 receptors, cabergoline suppresses prolactin gene transcription, reduces prolactin synthesis, and inhibits prolactin release into the bloodstream. In patients with prolactinomas, cabergoline also induces tumor shrinkage by inhibiting lactotroph cell proliferation and promoting apoptosis. The drug's selectivity for D2 receptors over D1 receptors contributes to its favorable side effect profile compared to less selective dopamine agonists. In the context of 19-nor steroid use, nandrolone and trenbolone stimulate prolactin release through their progestogenic activity, and cabergoline directly counteracts this elevation by restoring dopaminergic inhibition at the pituitary level.

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Practical and safety references

These excerpts are educational, not personalised medical instructions.

Dosage reference

Dosing Protocols

Naltrexone is administered orally. Full-dose naltrexone (50 mg) is available as a standard pharmaceutical tablet (ReVia). Low-Dose Naltrexone (1-4.5 mg) is typically obtained as a compounded capsule or liquid from a compounding pharmacy, as commercial formulations at these low doses are not widely manufactured. Some practitioners prescribe commercially available 50 mg tablets to be dissolved in measured volumes of water or other vehicle for precise low-dose self-preparation, though compounded capsules are preferred for dosing accuracy. Low-Dose Naltrexone (LDN) - Standard Protocol 1.5 mg, titrate to 4.5 mg Once daily at bedtime Oral LDN - Ultra-Low Starting Dose (Sensitive Patients) 0.5-1.0 mg, titrate slowly to 4.5 mg Full-Dose - Opioid Dependence (FDA-Approved) 50 mg/day Once daily Full-Dose - Alcohol Dependence (FDA-Approved)

Source: peptide-db.com ↗
Side effects

Common Side Effects

Diarrhea (more prevalent than with injectable GLP-1s) Nausea (typically improves after first month) Appetite reduction

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Peptide Therapy Guide Editorial Team

Editorial team for Peptide Therapy Guide.

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