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Peptide.Guide
EstablishedSexual HealthOralDaily or as needed

Tadalafil

Cialis · Adcirca

Long-acting PDE5 inhibitor used for erectile dysfunction, BPH, and pulmonary hypertension.

◆ Editorial note

PDE5 inhibitor, not a peptide.

§ 01   Overview

Overview

Long-acting PDE5 inhibitor used for erectile dysfunction, BPH, and pulmonary hypertension.

FDA-approved for multiple indications with extensive clinical data.

§ 02   Mechanism

Mechanism of action

Tadalafil inhibits PDE5, preserving cGMP in smooth muscle and promoting vasodilation. Its ~17.5-hour half-life makes daily low-dose protocols possible.

  • 01Treatment of erectile dysfunction
  • 02Improves LUTS in BPH
  • 03Possible cardiovascular effects (off-label)

§ 03   Dosing

Dosing protocol

Standard Protocol

Dose Range
2.5 – 20 mg
Starting Dose
5 mg daily or 10 mg PRN
Route
Oral
Timing
Any time
Frequency
Daily or as needed

§ 04   Evidence

Evidence & research

Established

FDA-approved for multiple indications with extensive clinical data.

FDA Status

FDA-approved (ED, BPH, pulmonary hypertension).

§ 06   News

In the news

8 articles from the last 12 months · updates hourly

§ 07   Sourcing

Sourcing & supply

Regulatory status

FDA-approved

This compound has an FDA approval for at least one indication. Brand pharmacy channels exist. Compounding may or may not be available depending on shortage status.

Telehealth (Rx) · 3

Telehealth

Maximus Tribe

Rx required

Performance medicine platform. Flagship 'Oral TRT+' (enclomiphene + pregnenolone). Claims LegitScript-certified pharmacy partners.

1 flag on record
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Telehealth

Fountain TRT / Fountain Vitality

Rx required

Urologist-led TRT + GLP-1 platform. 4-star Trustpilot. Distinct from Fountain Life.

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Telehealth

Superpower

Rx required

Longevity-biomarker subscription ($199/yr, 100+ biomarkers) with narrow prescription formulary.

Visit

Listings are informational, not endorsement. Verify credentials and flags against FDA and PCAB databases before purchasing. Full directory & how to verify →

§ 09   Safety

Safety & side effects

Side effects

  • 01Headache
  • 02Back pain / myalgia
  • 03Flushing
  • 04Rare: priapism, vision changes

Contraindications

  • 01Nitrate medications
  • 02Severe cardiovascular disease

This site is for educational and research purposes only. It does not constitute medical advice. Always consult a qualified healthcare provider before using any peptide or supplement.