Tadalafil Tablets – Uses, Dosage, Side Effects, and Comparison with Sildenafil in Diabetic Patients

 

Introduction

Tadalafil ek well-known medicine hai jo phosphodiesterase type 5 (PDE5) inhibitors group se belong karti hai. Ye drug duniya bhar me sabse zyada erectile dysfunction (ED) ke treatment ke liye use hoti hai. Iske ilawa tadalafil ka istemal pulmonary arterial hypertension (PAH) aur benign prostatic hyperplasia (BPH) ke symptoms ke liye bhi approved hai. Pakistan me bhi tadalafil widely available hai aur commonly “Cialis” brand name ke zariye jana jata hai.



Composition (Formulations in Pakistan)

  • Tadalafil 2.5 mg tablet

  • Tadalafil 5 mg tablet

  • Tadalafil 10 mg tablet

  • Tadalafil 20 mg tablet

Mechanism of Action – Kaise Kaam Karta Hai?

Tadalafil PDE5 enzyme ko block karta hai, jo cyclic guanosine monophosphate (cGMP) ko breakdown karta hai. Jab PDE5 block hota hai, to cGMP ka concentration barh jata hai jisse smooth muscle relaxation aur blood flow increase hota hai.

  • Erectile Dysfunction me: Penile arteries aur corpus cavernosum muscles relax karte hain, jis se erection hoti hai (sexual stimulation ke doran).

  • Pulmonary Hypertension me: Pulmonary vessels relax hoti hain, aur blood pressure kam hota hai.

  • BPH me: Prostate aur bladder ki smooth muscles relax hoti hain, jisse urination ke symptoms improve hote hain.

Pharmacokinetics (Absorption, Distribution, Metabolism)

  • Oral absorption excellent hai (food intake se effect nahi hota).

  • Peak plasma concentration: 2 ghante me.

  • 94% drug plasma protein ke sath bind hoti hai.

  • Major metabolism liver me hota hai.

  • Half-life: ~17 hours (is wajah se iska effect 36 hours tak reh sakta hai).

Indications (Tadalafil Kahan Use Hota Hai)

  1. Erectile Dysfunction (ED)(mardana kamzori)

  2. Pulmonary Arterial Hypertension (PAH)

  3. Benign Prostatic Hyperplasia (BPH) – urinary symptoms improve karne ke liye.

  4. Combination of ED + BPH (specially older men).

Dosage and Administration

Erectile Dysfunction

  • Initial dose: 10 mg (sexual activity se 30 minutes pehle).

  • Depending on response, dose 5 mg se lekar 20 mg tak adjust ki ja sakti hai.

  • Most patients me 1 dose per day kaafi hoti hai

  • Effect 36 hours tak rehta hai (“Weekend Pill”).

Pulmonary Hypertension

  • Recommended dose: 40 mg once daily.

Benign Prostatic Hyperplasia (BPH)

  • 5 mg once daily.

  • Treatment 26 weeks tak continue kiya ja sakta hai.

Contraindications (Kin Patients Ko Nahi Dena)

❌ Nitrate therapy lene wale patients (severe hypotension risk).
❌ Riociguat ke sath combination.
❌ Hypersensitivity to tadalafil.
❌ Recent myocardial infarction (last 90 days).
❌ Severe angina during intercourse.

Adverse Reactions (Side Effects)

  • Headache, dizziness, flushing.

  • Back pain, muscle aches.

  • Nasal congestion.

  • Indigestion, reflux.

  • Rare: Priapism (prolonged painful erection), sudden vision or hearing loss, angioedema, stroke, cardiac events.

Precautions

  • Hypotension risk – specially jab vasodilators ke sath li jaye.

  • Liver/kidney disease patients me dose adjust karni parti hai.

  • Pregnancy & lactation me avoid karna chahiye.

  • Children me use recommended nahi hai.

Overdose

  • High doses (500 mg single dose) tak trials me di gayi hain.

  • Overdose me supportive care provide ki jati hai.

Brands Available in Pakistan

  • Cialis (Original Brand)

  • Fildil (Highnoon)

  • Other generics: Tadalis, Tadacip, Tadilacto.

  • Sildenafil (Viagra)

  • Vardenafil (Levitra)

  • Avanafil

Sildenafil vs Tadalafil – Comparison (Specially for Diabetic Patients)

1. Onset of Action (Asar shuru hone ka waqt)

  • Sildenafil (Viagra): 30–60 minutes.

  • Tadalafil (Cialis): 30 minutes, aur asar 36 hours tak rehta hai.

👉 Diabetic patients ke liye tadalafil better hai kyunki lambe duration se convenience milta hai.

2. Duration of Action

  • Sildenafil: 4–6 hours.

  • Tadalafil: 24–36 hours.

3. Effectiveness in Diabetic Men

  • Sildenafil ka response diabetics me kabhi kabhi kam hota hai.

  • Tadalafil ne clinical studies me better response aur tolerance show kiya hai.

4. Side Effects

  • Sildenafil: Vision disturbances common (blue vision).

  • Tadalafil: Back pain aur headache zyada common, vision issues kam.

5. Daily Use Option

  • Sildenafil: ❌ Not suitable.

  • Tadalafil: ✅ 2.5–5 mg daily use approved hai, specially diabetics aur chronic ED patients ke liye.

Comparison Table

FeatureSildenafil (Viagra)Tadalafil (Cialis)
Onset of action  30–60 min           ~30 min
Duration  4–6 hours            24–36 hours
Effect in diabetics   Effective but variable         More effective & sustained
Vision side effects   Common         Rare
Daily use option❌ Not approved  ✅ 2.5–5 mg daily

Special Note for Diabetic Patients

  • Diabetes se ED kaafi common hai (30–50% diabetic men affected).

  • Tadalafil daily low-dose therapy (2.5–5 mg) best suited hai diabetic patients ke liye, kyunki:

    • Lambe duration ka asar deta hai.

    • Blood sugar aur food se ziada effect nahi hota.

    • Convenience aur spontaneity allow karta hai.

Conclusion

Tadalafil ek highly effective PDE5 inhibitor hai jo erectile dysfunction, pulmonary hypertension aur BPH ke treatment ke liye use hota hai. Diabetic patients ke liye tadalafil sildenafil ke comparison me zyada effective, lambe duration ka aur convenient option hai. Har patient ke liye medicine start karne se pehle doctor ki advice lena zaroori hai, specially agar wo heart disease, hypertension, ya liver/kidney issues ke patient hain.

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