Description
Tastylia (Tadalafil) 5 mg
Tastylia 5 mg is a tadalafil-containing oral medicine. Tadalafil is a phosphodiesterase type 5 (PDE5) inhibitor used in established medical treatment of erectile dysfunction and, in some jurisdictions and products, lower urinary tract symptoms associated with benign prostatic hyperplasia.
Active Ingredient and Medicine Class
The verified active ingredient is tadalafil, a selective PDE5 inhibitor. This class acts on the nitric oxide–cGMP pathway and is used for conditions where improved smooth muscle relaxation and blood flow are clinically beneficial.
Established Medical Uses
Official prescribing information for tadalafil tablets identifies treatment of erectile dysfunction in adult men as an established use. Some tadalafil products are also approved for benign prostatic hyperplasia–related lower urinary tract symptoms, and clinical reviews support the use of tadalafil 5 mg once daily in men with LUTS/BPH, with or without erectile dysfunction.
How It Works
Tadalafil inhibits PDE5, an enzyme that breaks down cyclic guanosine monophosphate (cGMP). By preserving cGMP, tadalafil helps enhance smooth muscle relaxation and blood flow in erectile tissue during sexual stimulation. Its longer duration of action is one reason it has been studied for once-daily use.
Important Safety Information
Tadalafil is contraindicated with any form of organic nitrate because of the risk of a marked drop in blood pressure. Prescribing information also warns about clinically significant interactions with alpha-blockers, antihypertensives and alcohol, which may further lower blood pressure. Serious hypersensitivity reactions have been reported, and tadalafil products are not recommended in some settings with alpha-blockers for BPH management.
Safety information in official labeling also highlights caution in patients with cardiovascular disease, since vasodilatory effects can be clinically relevant.
Possible Side Effects
Commonly reported adverse effects include headache, dyspepsia, back pain, myalgia, nasal congestion, flushing and pain in the limbs. Other reported effects include dizziness, diarrhea and upper abdominal discomfort. Rare but important reactions can include severe skin or hypersensitivity reactions.
Scientific Evidence
PubMed-indexed reviews and clinical studies indicate that tadalafil is effective for erectile dysfunction, with evidence supporting both daily and on-demand regimens. Reviews of once-daily 5 mg tadalafil also report benefit for LUTS/BPH in appropriate patients, while headache and dyspepsia remain among the most frequent adverse effects.
Medical Information Notice
This summary is an educational overview based on sources available at the time of review. It does not replace the official patient leaflet, product labeling, or assessment by a qualified healthcare professional.
Medical Sources
- DailyMed — Tadalafil tablet, prescribing information
- Meuleman EJ — Review of tadalafil in the treatment of erectile dysfunction — Expert Opinion on Pharmacotherapy (2003)



