Silodosin 8 mg and Tadalafil 5 mg Tablets: Complete Uses & Safety Guide
SILODOSIA T 8/5 contains Silodosin 8 mg and Tadalafil 5 mg and is marketed by Steris Healthcare. This prescription combination brings together two medicines with different mechanisms that may be used in appropriate adult men experiencing symptoms associated with benign prostatic hyperplasia (BPH), particularly when erectile dysfunction is also present.
Silodosin is an alpha-1 adrenergic receptor blocker that relaxes smooth muscle in the prostate and bladder neck, helping improve urinary flow and reduce lower urinary tract symptoms. Tadalafil is a phosphodiesterase-5 (PDE5) inhibitor that increases blood flow and is used for erectile dysfunction; at a 5 mg once-daily dose, tadalafil may also improve certain BPH urinary symptoms.
The combination should be used only under the direction of a qualified healthcare professional because both medicines can lower blood pressure and may cause dizziness or light-headedness in some individuals.
What is SILODOSIA T 8/5 For?
SILODOSIA T 8/5 may be prescribed for adult men with BPH-associated lower urinary tract symptoms (LUTS) when combination therapy is considered appropriate and erectile dysfunction is also present.
BPH is a non-cancerous enlargement of the prostate that can narrow the urinary passage. Symptoms may include:
Difficulty starting urination
Weak or interrupted urine flow
Frequent urination
Urgency to urinate
Increased nighttime urination
Feeling that the bladder has not completely emptied
Silodosin primarily addresses urinary symptoms by relaxing smooth muscle around the prostate and bladder outlet. Tadalafil can improve erectile function and may also help relieve BPH-related urinary symptoms through smooth-muscle relaxation and increased blood flow.
This medicine is not intended to treat prostate cancer and does not shrink the prostate directly.
Why is This Combination Important?
BPH and erectile dysfunction can occur together in the same individual. Although they are different conditions, they can share vascular and smooth-muscle pathways.
Silodosin 8 mg selectively blocks alpha-1A adrenergic receptors, particularly in tissues associated with the prostate and lower urinary tract. This reduces smooth-muscle tone and can improve urine flow.
Tadalafil 5 mg inhibits PDE5, increasing cyclic GMP activity and promoting smooth-muscle relaxation. This improves penile blood flow during sexual stimulation and can also contribute to improvement in BPH-related urinary symptoms.
Using two medicines with complementary mechanisms may provide broader symptom management in appropriately selected patients.
Key Benefits
What Are the Benefits?
When prescribed for an appropriate patient, SILODOSIA T 8/5 may provide the following therapeutic benefits:
Helps relieve urinary symptoms associated with BPH.
May improve urinary flow by relaxing prostate and bladder-neck smooth muscle.
Helps reduce symptoms such as weak stream, urgency and incomplete bladder emptying.
Tadalafil 5 mg can improve erectile function in men with erectile dysfunction.
Provides two complementary pharmacological mechanisms in one combination.
May be convenient for patients who require treatment for both BPH symptoms and erectile dysfunction.
The degree of improvement varies from person to person. The medicine should be continued only according to the prescribed treatment plan.
Side Effects
Like all prescription medicines, Silodosin 8 mg and Tadalafil 5 mg can cause side effects.
Possible side effects include:
Dizziness
Headache
Nasal congestion
Indigestion
Diarrhea
Low blood pressure
Weakness
Back pain or muscle aches
Abnormal ejaculation or reduced amount of semen
Changes in ejaculation
Flushing
Abnormal or reduced ejaculation is a recognized effect of silodosin because of its action on smooth muscle involved in ejaculation. It is generally reversible after discontinuation but should be discussed with a healthcare professional if it is troublesome.
Tadalafil may commonly cause headache, indigestion, flushing, nasal congestion and muscle or back pain.
Serious Side Effects
Serious adverse reactions are uncommon but require prompt medical attention.
Seek urgent medical care for:
Fainting or severe dizziness
Severe allergic reaction
Chest pain during or after sexual activity
Sudden loss of vision
Sudden loss of hearing
An erection lasting more than 4 hours
Severe or persistent low blood pressure
Serious cardiovascular symptoms
An erection lasting more than four hours (priapism) is a medical emergency and requires immediate treatment to prevent permanent damage.
Tadalafil should not be taken with nitrate medicines because the combination can cause a potentially dangerous fall in blood pressure.
Available Substitute
There is no single substitute that is suitable for every patient. The alternative depends on whether treatment is primarily required for BPH, erectile dysfunction or both.
Possible therapeutic alternatives may include:
Silodosin alone
Tadalafil 5 mg alone
Other alpha-1 blockers
Other PDE5 inhibitors
Other BPH medicines such as 5-alpha-reductase inhibitors
Combination therapy selected according to individual symptoms and medical history
A substitute should not be selected solely because it contains one of the same ingredients. Strength, formulation, medical indication, blood-pressure status and other medicines must be considered.
Do not discontinue SILODOSIA T 8/5 or switch to another medicine without professional medical advice.
Dosage Guidelines
The dosage should be determined by the prescribing healthcare professional.
General administration principles include:
Take the medicine exactly as prescribed.
Do not take more than the recommended dose.
Take silodosin with a meal according to the prescribed instructions.
Swallow the tablet with water.
Avoid independently changing the timing or frequency of doses.
If a dose is missed, follow the instructions provided by your healthcare professional or product labeling.
Do not take an additional dose to compensate for a missed dose.
Because both components can affect blood pressure, caution is important when starting treatment or changing doses.
Precautions & Warnings
Low Blood Pressure
Silodosin and tadalafil can both contribute to blood-pressure reduction. The risk of dizziness or fainting may increase when these medicines are combined with other blood-pressure-lowering medicines.
Rise slowly from sitting or lying positions, particularly when beginning treatment.
Nitrates
Tadalafil must not be combined with nitrate medicines because this can cause a significant and potentially dangerous drop in blood pressure.
Tell your healthcare professional about all medicines used for chest pain or heart disease.
Alpha Blockers and Blood-Pressure Medicines
Inform your doctor if you are taking other alpha blockers, antihypertensive medicines or medicines that affect blood pressure. Additional blood-pressure lowering may occur.
Kidney Function
Silodosin and tadalafil dosing may require consideration of kidney function. Patients with significant renal impairment should receive individualized medical advice before using this combination.
Liver Function
Tell your healthcare professional about liver disease or abnormal liver-function tests. Tadalafil dosing and suitability can be affected by hepatic impairment.
Cardiovascular Disease
Sexual activity itself can place additional stress on the cardiovascular system. Men with significant heart disease or recent cardiovascular events should discuss sexual activity and tadalafil treatment with their healthcare professional.
Alcohol
Excessive alcohol consumption can increase dizziness and blood-pressure-lowering effects and may also affect erectile function.
Other Erectile Dysfunction Medicines
Do not combine tadalafil with other PDE5 inhibitors or erectile-dysfunction treatments unless specifically instructed by a healthcare professional.
Pregnancy
This medicine is intended for use in adult men and is not indicated for women or children.
Mechanism of Action
How Does Silodosin 8 mg Work?
Silodosin is a selective alpha-1A adrenergic receptor antagonist.
Alpha-1A receptors are abundant in the prostate, bladder neck and lower urinary tract. Activation of these receptors contributes to smooth-muscle contraction.
Silodosin blocks these receptors, producing smooth-muscle relaxation.
Alpha-1A blockade → prostate and bladder-neck relaxation → reduced urinary resistance → improved urine flow → relief of BPH symptoms
Silodosin primarily improves urinary symptoms and does not directly shrink the prostate.
How Does Tadalafil 5 mg Work?
Tadalafil is a phosphodiesterase-5 (PDE5) inhibitor.
During sexual stimulation, nitric oxide promotes production of cyclic guanosine monophosphate (cGMP), which contributes to smooth-muscle relaxation and increased blood flow in the penis.
PDE5 normally breaks down cGMP. Tadalafil inhibits PDE5, allowing cGMP activity to persist for longer.
PDE5 inhibition → increased cGMP activity → smooth-muscle relaxation → increased penile blood flow → improved erectile response during sexual stimulation
Tadalafil also affects smooth muscle in the lower urinary tract and may improve certain BPH symptoms.
Conclusion
SILODOSIA T 8/5, containing Silodosin 8 mg and Tadalafil 5 mg, is a prescription combination marketed by Steris Healthcare for appropriately selected adult men with BPH-related urinary symptoms when tadalafil is also clinically appropriate for erectile dysfunction or related symptoms.
Silodosin relaxes smooth muscle in the prostate and bladder neck to improve urinary flow, while tadalafil inhibits PDE5 to improve blood flow and erectile function and may also help BPH-related urinary symptoms.
The combination is not suitable for everyone. Particular caution is required with nitrate medicines, other blood-pressure-lowering treatments, significant cardiovascular disease and certain kidney or liver conditions. Use this medicine only according to professional medical advice, and seek urgent care for severe dizziness, chest pain, sudden vision or hearing changes, or an erection lasting more than four hours.
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