To apply diltiazem ointment for an anal fissure, squeeze a 2.5 cm (roughly one inch) strip of ointment onto your fingertip and gently spread it over the broken skin around the anus. You’ll typically do this twice a day for six to eight weeks. The process is straightforward, but getting the details right helps the ointment work effectively and keeps the area clean.
Step-by-Step Application
Wash your hands thoroughly with soap and warm water before each application. If you prefer not to use a bare finger, a disposable glove or finger cot works well and makes cleanup easier.
Squeeze approximately 2.5 cm (about one inch) of ointment onto your fingertip. This is roughly the size of a pea-to-marble strip. Gently apply the ointment to the skin just inside and around the anal opening where the fissure is located. You don’t need to insert your finger deeply. Use a light, smooth motion rather than rubbing, since the tissue is already damaged and pressure will cause pain.
After application, wash your hands again thoroughly. If you used a glove or finger cot, dispose of it and still wash your hands. Avoid wiping away the ointment or using toilet paper immediately afterward. The goal is to let the medication stay in contact with the fissure for as long as possible.
Most prescriptions call for twice-daily application, typically once in the morning and once before bed. Applying after a bowel movement or a warm bath is ideal, since the area is already clean and the warm water helps relax the surrounding muscles.
How Diltiazem Heals the Fissure
An anal fissure persists partly because the ring of muscle around the anus (the internal sphincter) stays abnormally tight. This constant tension restricts blood flow to the torn tissue, which prevents it from healing the way a cut on your arm would. Diltiazem is a calcium channel blocker that relaxes that muscle. By reducing the tightness, it restores blood flow to the area and gives the fissure the oxygen and nutrients it needs to close.
The standard concentration is 2% diltiazem. This is almost always a compounded preparation, meaning a pharmacist makes it specifically for you rather than it coming off a shelf in a standard package.
What to Expect During Treatment
Most people notice pain relief within the first couple of weeks, but full healing takes longer. In clinical studies reviewed by the UK’s National Institute for Health and Care Excellence, the average time to complete fissure healing ranged from about five to eight weeks depending on the study. By six weeks, roughly 69% of patients had fully healed fissures. By eight weeks, that number climbed to around 80% in one trial. Treatment courses typically last six to eight weeks, though some extend to twelve.
Complete symptom relief (no pain or bleeding) occurred in about 73% of patients using diltiazem in a randomized trial of 102 people, compared to 55% using nitroglycerin ointment. Both medications work, but diltiazem tends to cause fewer side effects, particularly headaches, which is why it’s often the preferred option.
Side Effects
The first application is almost always uneventful. In a study of 30 patients, 17% developed side effects over the course of treatment. The most common issue was perianal itching, reported by four patients. One patient experienced a headache. These numbers are notably lower than those seen with nitroglycerin ointment, where headaches are a frequent complaint.
Because diltiazem relaxes smooth muscle, it can theoretically lower blood pressure. With a topical application this small, systemic absorption is minimal for most people. However, if you’re already taking oral calcium channel blockers or other medications that lower blood pressure or slow heart rate, the effects could overlap. Let your prescriber know about any heart or blood pressure medications you take.
Storing the Ointment
Compounded diltiazem ointment doesn’t have the same shelf life as a factory-sealed medication. When made with a petrolatum (Vaseline-type) base, which is the most common formulation, the ointment stays stable for about 90 days at room temperature. Store it in a cool, dry place away from direct sunlight. Don’t leave it in a hot car or bathroom where temperatures climb, as heat breaks down the active ingredient quickly. At elevated temperatures, the ointment may only remain stable for about a week in a plastic jar.
Your pharmacist will put a beyond-use date on the label. Pay attention to it, since compounded medications genuinely lose potency after that date.
Tips for Better Results
Diltiazem works best as part of a broader approach to fissure care. Keeping stools soft is critical, because hard or straining bowel movements re-tear the fissure and undo the healing. A fiber supplement, adequate water intake, and a stool softener if needed all reduce strain. Warm sitz baths for 10 to 15 minutes, two or three times a day, relax the sphincter muscle in the same way diltiazem does and provide additional pain relief.
Consistency matters more than perfection. Missing a single dose won’t reset your progress, but skipping applications regularly will slow healing. If you forget a dose, apply it as soon as you remember and then return to your normal schedule. Don’t double up to compensate. If the fissure hasn’t improved after eight weeks of consistent use, the next step is usually a conversation with your doctor about alternative treatments, which may include a different topical medication or a minor procedure.