GTN ointment (also called nitroglycerin cream) is common medical treatment for anal fissure. If your doctor prescribed it, or you considering using it, this article explain everything you need to know about GTN ointment – how it work, how to use properly, side effects, and success rate.
What is GTN Ointment?
GTN stand for Glyceryl Trinitrate. It same medicine used for heart patients (nitroglycerin), but in ointment form for fissure treatment.
Common names you might see:
- GTN ointment
- Nitroglycerin cream
- Rectiv (brand name)
- Glyceryl trinitrate ointment
Strength: Usually 0.2% or 0.4%
Important: This is prescription medicine. You need doctor prescription to buy it. Don’t use without medical advice.
How Does GTN Ointment Work?
Understanding how GTN work help you use it properly.
The Problem: Tight Muscle
In anal fissure, the sphincter muscle (ring muscle around anus) become very tight. This tight muscle:
- Cause severe pain
- Reduce blood flow to fissure area
- Prevent healing
- Create vicious cycle – pain → spasm → more pain
The Solution: GTN Relaxes Muscle
GTN ointment work by:
- Relaxing sphincter muscle – Reduce tightness and spasm
- Increasing blood flow – More blood reach fissure, bringing oxygen and nutrients
- Reducing pain – Less muscle spasm = less pain
- Allowing healing – Better blood supply help tissue repair naturally
Think of it like this: GTN give your body chance to heal by creating right conditions – relaxed muscle and good blood flow.
Success Rate: Does GTN Really Work?
Important to know realistic expectations:
For Acute Fissure (less than 6 weeks old):
- Success rate: 50-60%
- Healing time: 6-8 weeks
- Better results if combined with diet and lifestyle changes
For Chronic Fissure (more than 8-12 weeks):
- Success rate: 30-40%
- May need longer treatment (8-12 weeks)
- If fail, may need Botox or surgery
This mean GTN work for about half of peoples with acute fissure. Not guaranteed cure, but worth trying before surgery.
How to Use GTN Ointment Properly
Proper use very important for best results and less side effects.
Step-by-Step Instructions
Before Application:
- Wash hands thoroughly with soap
- Clean anal area gently with water
- Pat dry with soft towel
Application:
- Squeeze pea-size amount on finger (very small amount – don’t use too much)
- Apply gently to fissure area (just inside anal opening)
- Don’t insert finger deep – just apply at opening
- Gently spread ointment around area
- Wash hands immediately after
After Application:
- Sit or lie down for 10-15 minutes
- Let medicine absorb
- Don’t wipe area immediately
How Often to Apply
Standard dosing:
- Apply 2-3 times daily
- Usually morning, afternoon, and night
- Every 8-12 hours if twice daily
- At same times each day for consistency
Best times:
- After bowel movement (most important)
- After sitz bath
- Before sleep (help reduce night pain)
How Long to Continue
Minimum treatment duration: 6-8 weeks
Very important: Don’t stop early even if feel better! Many peoples make this mistake.
- Week 1-2: Pain start reducing
- Week 3-4: Feel much better, but fissure not fully healed yet
- Week 5-8: Continue for complete healing
If stop too early, fissure likely come back.
Side Effects of GTN Ointment
Most peoples experience some side effects, but they usually manageable.
Very Common Side Effect: Headache
This happen to 60-80% of peoples using GTN.
Why headache happen:
- GTN dilate (widen) blood vessels
- This happen throughout body, not just at fissure
- Widened blood vessels in head cause headache
What headache feel like:
- Usually mild to moderate
- Throbbing or pounding
- Start 10-30 minutes after application
- Last 1-2 hours
How to manage headache:
- Start with smaller amount – Use half pea-size first few days, then increase
- Take paracetamol – 500mg before or after GTN application (ask doctor first)
- Lie down – Rest for 30 minutes after applying
- Drink water – Stay well hydrated
- Be patient – Headache usually reduce after 7-10 days as body adjust
If headache too severe:
- Talk to doctor
- May reduce to once daily
- May switch to calcium channel blocker (less headache)
Other Side Effects (Less Common)
Dizziness or lightheadedness:
- Due to low blood pressure
- Lie down if feel dizzy
- Usually pass in 30 minutes
Flushing (face become red):
- Temporary
- Not dangerous
- Will pass
Burning sensation at application site:
- Mild burning normal
- Usually last few minutes
- If severe, stop and consult doctor
When to Stop and Call Doctor
Stop using GTN and contact doctor if:
- Severe headache that not improve with paracetamol
- Severe dizziness or fainting
- Chest pain or irregular heartbeat
- Severe allergic reaction (rash, swelling, difficulty breathing)
- Symptoms getting worse instead of better
Important Precautions and Warnings
Do Not Use GTN If:
- You have very low blood pressure
- You taking medicines for erectile dysfunction (Viagra, Cialis, etc.) – DANGEROUS combination
- You have severe anemia
- You recently had heart attack
- You allergic to nitrates
- You pregnant or breastfeeding (unless doctor say okay)
Tell Your Doctor If:
- You have heart disease
- You taking blood pressure medicines
- You have migraine headaches
- You have kidney or liver disease
- You taking any other medicines
Special Precautions
- Avoid alcohol – Can increase dizziness and headache
- Be careful standing up – Stand slowly to avoid dizziness
- Don’t drive immediately after – Wait until any dizziness pass
- Wash hands after use – Don’t touch eyes or face with ointment on fingers
- Keep away from children – Store safely
Maximizing Success with GTN
GTN work best when combined with other treatments. Don’t rely on ointment alone.
Essential Combination Treatments
1. High Fiber Diet (Most Important)
- Keep stool soft so fissure not re-injured
- Eat 25-30 grams fiber daily
- Whole wheat roti, daal, vegetables, fruits
2. Plenty Water
- Drink 8-10 glasses daily
- Fiber without water make constipation worse
3. Regular Sitz Bath
- 3-4 times daily
- 10-15 minutes each time
- After bowel movement always
4. Good Bathroom Habits
- Never strain
- Go when feel urge
- Don’t sit long on toilet
Read our complete guide on home remedies for fissure for details.
What If GTN Doesn’t Work?
If you tried GTN properly for 8-12 weeks with no improvement, don’t worry. Other options available.
Next Steps
Option 1: Try Calcium Channel Blocker
- Diltiazem cream 2%
- Work similar to GTN
- Less headache
- Similar success rate
Option 2: Botox Injection
- Success rate 60-70%
- Single injection, lasts 2-3 months
- Cost Rs. 25,000-40,000
- Good option before surgery
Option 3: Surgery
- If all conservative treatment fail
- Success rate 90-95%
- Permanent solution
- Laser surgery (modern option) or traditional surgery
Dr. Abdullah Iqbal, Karachi’s first and only laser proctologist, can help decide best next step if GTN not working. Learn more about all treatment options and surgery.
GTN vs Other Treatments
GTN Ointment:
- Success: 50-60% (acute), 30-40% (chronic)
- Cost: Rs. 800-2,000 per tube
- Duration: 6-8 weeks
- Side effects: Headache common
- Pros: Non-invasive, can try at home
- Cons: Daily application needed, headache, moderate success
Calcium Channel Blocker:
- Success: Similar to GTN
- Cost: Similar
- Duration: 6-8 weeks
- Side effects: Less headache
- Pros: Better tolerated than GTN
- Cons: May be harder to find
Botox Injection:
- Success: 60-70%
- Cost: Rs. 25,000-40,000
- Duration: One injection, effect 2-3 months
- Side effects: Very minimal
- Pros: Higher success, one-time procedure
- Cons: More expensive, temporary effect
Surgery (Laser):
- Success: 90-95%
- Cost: Rs. 60,000-100,000
- Duration: Heal in 2-3 weeks
- Side effects: Minimal with laser
- Pros: Highest success, permanent
- Cons: Most expensive, is surgery
Cost and Availability in Pakistan
Price:
- GTN ointment: Rs. 800-2,000 per tube
- One tube last 2-3 weeks
- Need 3-4 tubes for full treatment course
- Total cost: Rs. 2,400-8,000
Where to buy:
- Need prescription from doctor
- Available at most major pharmacies
- May need to order if not in stock
- Sometimes imported, so availability vary
Insurance coverage:
- Some insurance cover prescription medicines
- Check with your insurance provider
- Keep receipts for claims
Storage and Handling
- Store in cool place – Room temperature okay, don’t refrigerate
- Keep tube tightly closed – Prevent drying
- Away from children – Keep safe
- Check expiry date – Don’t use expired medicine
- Don’t share – Use only for yourself
Common Questions About GTN Ointment
Can I use GTN long-term?
Not recommended. Use for 6-12 weeks maximum. If not working by then, need different treatment.
What if I miss a dose?
Apply as soon as remember. If almost time for next dose, skip missed dose. Don’t double up.
Can I use more than prescribed to heal faster?
No! Using more won’t help heal faster and increase side effects. Follow prescribed amount.
Is GTN safe during pregnancy?
Tell doctor if pregnant or planning pregnancy. Usually avoided during pregnancy unless benefit outweigh risk.
Can I exercise while using GTN?
Yes, but avoid heavy lifting. Gentle walking is good. Don’t exercise immediately after application (wait 1-2 hours).
Will fissure come back after stopping GTN?
If you don’t maintain soft stool with diet and good habits, yes, can come back. GTN just help healing – prevention require lifestyle changes.
Tips for Best Results
- Be consistent – Apply at same times daily
- Don’t stop early – Complete full 6-8 weeks even if feel better
- Combine with lifestyle changes – Fiber, water, sitz bath
- Manage side effects – Take paracetamol for headache
- Keep diary – Track pain level, bleeding, bowel movements
- Follow up with doctor – Regular check-ups to monitor progress
- Be patient – Healing take time
- Don’t give up – If GTN not work, other options available
Final Words
GTN ointment is proven medical treatment for anal fissure with 50-60% success rate for acute fissure. While not work for everyone, it worth trying before considering surgery.
Key points remember:
- Use as prescribed – pea-size amount, 2-3 times daily
- Continue for 6-8 weeks minimum
- Headache is common but manageable
- Must combine with high fiber diet and lifestyle changes
- If not working after 8-12 weeks, consider other options
GTN give your body chance to heal naturally by relaxing tight muscle and improving blood flow. For best results, follow all instructions carefully and maintain healthy lifestyle habits.
If GTN not working for you, don’t lose hope. Many other effective treatments available, from Botox to surgery. Consult with specialist like Dr. Abdullah Iqbal to find best treatment for your specific case.
For more information, read our guides on all treatment options, how to cure fissure without surgery, and when surgery is needed. Learn about fissure symptoms and causes to better understand your condition.
Take control of your treatment today. Use GTN properly, give it honest try, and work with your doctor to find best solution for you!