SOLIFEN 5MG TABS 10S

What Is SOLIFEN 5mg?

Solifen 5mg contains Solifenacin Succinate, a selective anticholinergic medicine that targets the M3 muscarinic receptors specifically found in the bladder muscle (detrusor muscle). By selectively blocking these receptors, Solifenacin reduces the involuntary bladder contractions that cause the sudden, uncontrollable urge to urinate that characterises Overactive Bladder syndrome.

Compared to older, less selective anticholinergics like Oxybutynin, Solifenacin's M3 selectivity means it is more targeted to the bladder, producing effective urinary control with generally fewer non-bladder side effects such as dry mouth and cognitive effects, making it particularly suitable for older patients.

What Is It Used For?

Solifen 5mg is prescribed for people with Overactive Bladder (OAB), a condition that causes the sudden, urgent need to urinate that can be hard or impossible to control, leading to involuntary urine leakage (urge incontinence), very frequent urination during the day, and multiple waking episodes at night (nocturia).

OAB is more common with increasing age, in women (particularly after menopause), and in men with prostate conditions. It can significantly affect daily activities, social confidence, sleep quality, and emotional wellbeing. Solifen helps reduce these symptoms, giving patients greater bladder control, fewer daily bathroom visits, and better sleep.

In Kenya, it is prescribed by urologists and general practitioners for both men and women with established OAB.

Usual Dose

5mg once daily, swallowed whole with water, with or without food.

Dose Adjustment

The dose may be increased to 10mg once daily if 5mg is well tolerated but insufficiently effective, only on medical advice.

Consistency

Take at the same time every day for consistent blood levels and bladder control.

Swallow Whole

Do not crush or chew the tablet.

Missed Dose

Take as soon as remembered on the same day. If a full day has passed, skip and continue from the next. Never double dose.

Duration

Reassess benefit and tolerability after 4–8 weeks. Long-term use under medical review is appropriate if benefit continues.

Common Side Effects

·       Dry mouth (most common, worse at the 10mg dose)

·       Constipation

·       Blurred vision

·       Dry eyes

·       Urinary retention (difficulty fully emptying bladder, especially in men with prostatic obstruction)

Uncommon Side Effects

·       Nausea

·       Headache

·       Fatigue

·       Abdominal pain

Serious Side Effects, Seek Immediate Medical Attention

·       Acute urinary retention, inability to urinate at all (seek emergency care)

·       Angle-closure glaucoma precipitation

·       Tachycardia and palpitations

·       CNS effects in elderly: confusion, hallucinations (less than with Oxybutynin but still possible)

·       URINARY RETENTION: Men with BPH (enlarged prostate) are at increased risk of urinary retention, prostate obstruction must be assessed before prescribing.

·       GLAUCOMA: Do not use in uncontrolled narrow-angle glaucoma, consult an ophthalmologist before starting.

·       ELDERLY: Monitor for confusion and cognitive effects, anticholinergic burden must be considered carefully in older patients on multiple medications.

·       RENAL / HEPATIC IMPAIRMENT: Dose capping at 5mg in moderate renal or hepatic impairment; avoid in severe impairment.

·       HEAT RISK: Reduced sweating in hot conditions, advise caution in strenuous outdoor activity or hot environments.

·       DRIVING: Blurred vision and dizziness can occur, do not drive until the effect of the medicine is known.

Strong CYP3A4 inhibitors (ketoconazole, itraconazole, ritonavir): Significantly increase solifenacin levels, cap dose at 5mg; avoid 10mg dose in combination.

Other anticholinergic drugs: Additive anticholinergic burden, dry mouth, constipation, urinary retention, confusion.

QT-prolonging drugs: Solifenacin prolongs QT, avoid combination with amiodarone, haloperidol, or other QT-prolonging agents.

CYP3A4 inducers (rifampicin, phenytoin): May reduce solifenacin efficacy.

·       Store below 25°C in a cool, dry place.

·       Protect from moisture and light.

·       Keep in original packaging.

·       Keep out of reach of children.

Solifen 5mg is a prescription-only medicine (POM) in Kenya. It must be prescribed by a urologist, gynaecologist, or physician. Available at Pharmily with a valid prescription.

Solifen 5mg (Solifenacin) is a preferred antimuscarinic for OAB due to its M3 selectivity and relatively lower incidence of CNS anticholinergic effects compared to Oxybutynin. The CYP3A4 inhibitor interaction is clinically significant, ketoconazole or itraconazole concurrent use caps the dose at 5mg maximum and should be flagged at dispensing. Rifampicin interaction (TB treatment) reduces efficacy, relevant in Kenya.

Screen for concurrent anticholinergic medications (antihistamines, TCA antidepressants, bladder medications) and calculate cumulative anticholinergic burden, especially in elderly patients. The QT prolongation interaction requires screening for concurrent QT-prolonging drugs.

BPH assessment is essential in male patients, post-void residual volume > 150ml or significant obstructive symptoms are relative contraindications. The 10-tablet pack provides only a 10-day supply, advise the prescriber or patient to plan for a 30-day pack for continuous therapy.

How is Solifen different from Oxifast (Oxybutynin)?

A: Both treat overactive bladder, but Solifen (Solifenacin) is more selective for the bladder's M3 muscarinic receptors. This means it tends to cause fewer non-bladder side effects like dry mouth and cognitive effects, making it generally better tolerated, especially in older adults.

How quickly does Solifen work?

A: Many people notice some improvement in urgency and frequency within the first 1–2 weeks, with fuller benefit developing over 4–8 weeks. Your doctor will reassess the dose after this period.

Can I take Solifen if I have an enlarged prostate?

A: Men with an enlarged prostate must be assessed by a urologist before taking Solifen; the bladder-relaxing effect can worsen urinary obstruction and in some cases cause complete urinary retention.

Why is my mouth so dry on Solifen?

A: Solifen blocks muscarinic receptors in both the bladder and salivary glands, reducing saliva production. Sip water regularly throughout the day, chew sugar-free gum, or ask your pharmacist about a saliva spray to manage this.