Prescription requiredUrology/Andrology (Erectile dysfunction/BPH agent)

Megalis 5 Tab 10S — Side Effects & Warnings

Known side effects of Megalis 5 Tab 10S include Headache,flushing,indigestion (dyspepsia),nasal congestion,back pain,muscle pain,dizziness,nausea. Not everyone experiences these side effects.

Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated June 2026

Common Side Effects

Headache
flushing
indigestion (dyspepsia)
nasal congestion
back pain
muscle pain
dizziness
nausea

This is not an exhaustive list. Consult your doctor if you notice any unusual symptoms.

Important Warnings

Do not use with nitrates (e.g., nitroglycerin, isosorbide) due to dangerous drop in blood pressure. Use with caution in heart disease, low blood pressure, recent stroke/heart attack, severe liver/kidney impairment. Seek urgent care for chest pain, sudden vision/hearing loss, or erection lasting >4 hours (priapism). Not for women or children. Avoid in known hypersensitivity to tadalafil.

Drug Interactions

Megalis 5 Tab 10S may interact with the following:

Nitrates
riociguat
alpha-blockers (e.g.
tamsulosin/doxazosin)
other PDE5 inhibitors
strong CYP3A4 inhibitors (ketoconazole
itraconazole
ritonavir
clarithromycin)
CYP3A4 inducers (rifampicin
carbamazepine
phenytoin)
antihypertensives
alcohol
grapefruit juice

Always tell your doctor about all medicines you are taking, including over-the-counter drugs and supplements.

Pregnancy Safety

Not recommended

Alcohol Interaction

Use with caution (may increase dizziness and risk of low blood pressure)

Habit Forming

Storage

Store below 30°C in a dry place, protected from light and moisture. Keep out of reach of children.

Megalis 5 Tab 10S — Safety Summary

Composition: Tadalafil 5 mg
Prescription: Required (Rx)
Pregnancy: Not recommended
Alcohol: Use with caution (may increase dizziness and risk of low blood pressure)
Habit forming: No

Megalis 5 Tab 10S — Safety FAQs

What should I do if I experience side effects?

Mild side effects often resolve on their own. If side effects are severe or persistent, stop the medicine and consult your doctor immediately.

Are all listed side effects common?

No. Some side effects are common while others are rare. Not everyone experiences side effects. Consult your doctor if you are concerned.

Can I take this medicine with other drugs?

Some medicines interact with each other. Always inform your doctor about all medicines you are currently taking.

When should I seek emergency help?

Seek immediate medical attention if you experience severe allergic reactions (difficulty breathing, swelling of face/throat), chest pain, or any life-threatening symptoms.

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Safety disclaimer

This information is for educational purposes only and is not a substitute for professional medical advice. If you experience severe side effects, seek medical attention immediately.