Tadalafil

Chewable Tablets

25 mg

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Product Overview

Tadalafil Chewable Tablets Description1,2

Tadalafil is a phosphodiesterase type 5 (PDE5) inhibitor with an average terminal half-life exceeding 17 hours. This duration is significantly longer than that of other PDE5 inhibitors, such as sildenafil and vardenafil. The extended half-life supports both once-daily and on-demand dosing options. Tadalafil is indicated for the treatment of pulmonary arterial hypertension (PAH), erectile dysfunction (ED), benign prostatic hypertrophy (BPH), or the combined management of ED and BPH.

Mechanism of Action1,2,3

Phosphodiesterase (PDE) has many isoforms and is an enzyme that has many functions in the body including degrading the effect of cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP). PDE5 is an enzyme that is found in many parts of the body including in the smooth muscle of the corpus cavernosum, prostate, bladder, the vascular and visceral smooth muscle, skeletal muscle, urethra, platelets, kidney, lung, cerebellum, heart, liver, testis, seminal vesicle, and pancreas. Tadalafil is a selective inhibitor of PDE5, the enzyme responsible for the degradation of cGMP. The drug has selective activity on PDE5 than other phosphodiesterase isoforms. Tadalafil activity on PDE5 is more than 10,000-fold more than for PDE1, PDE2, PDE4, and PDE7 enzymes. Increased cGMP leads to smooth muscle relaxation in the corpus cavernosum which can help in maintaining an erection.

Common1

  • Headache
  • Dyspepsia
  • Flushing
  • Back pain and myalgia (typically delayed onset, resolving within 48 hours)
  • Nasal congestion
  • Pain in limbs

Contraindications1,2

  • Known hypersensitivity to tadalafil or tablet excipients
  • Use of nitrates and guanylate cyclase (GC) stimulators therapy, such as riociguat due to risk of life-threatening hypotension

Precautions1,2

  • Use with caution in patients with:
  • Severe hepatic impairment (Child-Pugh Class C)
  • Severe renal impairment (creatinine clearance <30 mL/min)
  • Retinitis pigmentosa (rare inherited retinal disorder)
  • History of NAION (non-arteritic anterior ischemic optic neuropathy)
  • Recent history of myocardial infarction, stroke, or unstable angina
  • Store at controlled room temperature (20°C to 25°C / 68°F to 77°F)
  • Protect from moisture and light
  • Keep in a tightly closed container
  1. Tadalafil Prescribing Information – Eli Lilly. www.accessdata.fda.gov/drugsatfda_docs/label/2011/021368s20s21lbl.pdf Revised October 2011. Accessed May 31, 2025
  2. Clinical Pharmacology Tadalafil clinical monograph 2025 https://www.clinicalkey.com/pharmacology/
  3. Padda IS, Tripp J. Phosphodiesterase Inhibitors. [Updated 2023 Jun 26]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK559276/

WPPL operates as a 503A compounding pharmacy and prepares individualized prescription medications pursuant to provider direction. Compounded preparations are not reviewed, tested, or approved by the FDA.

This listing also includes commercially manufactured products for convenience; these items are not compounded by our pharmacy and are sold as provided by their manufacturers. Actual products in stock at time of dispensing may vary due to supply chain variability. Any statements regarding non-compounded products are manufacturer-supplied, have not been evaluated by the FDA, and are not intended to diagnose, treat, cure, or prevent any disease. WPPL does not verify or endorse any therapeutic claims made by manufacturers. Please refer to original labeling for complete product information.

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