Alternatives to Dicyclomine If You Can't Fill Your Prescription

Dicyclomine is a reliable and affordable first-line treatment for irritable bowel syndrome (IBS), but if your pharmacy doesn't have it in stock or if you experience side effects that make it difficult to tolerate, you're not out of options. Several medications work in similar ways — and a few take a completely different approach — that your doctor may consider as alternatives.

Important: Always talk to your prescriber before switching IBS medications. Even medications in the same drug class can have different interactions, side effects, and contraindications for your individual situation.

1. Hyoscyamine (Levsin) — The Closest Alternative

Hyoscyamine (brand names: Levsin, Levbid, NuLev, Anaspaz) is the most commonly used alternative to dicyclomine for IBS-related abdominal cramping. Like dicyclomine, it is an anticholinergic antispasmodic that relaxes smooth muscle in the gut by blocking muscarinic acetylcholine receptors.

Key differences from dicyclomine:

Faster onset: Hyoscyamine typically starts working within 30–60 minutes (vs. 40–60 minutes for dicyclomine).

Sublingual option: Hyoscyamine is available in a dissolvable tablet placed under the tongue for rapid acute relief.

Shorter duration: Generally shorter-acting than dicyclomine, so dosing frequency may differ.

Similar side effects: Dry mouth, blurred vision, dizziness, and urinary retention are shared side effects.

2. Librax (Clidinium + Chlordiazepoxide) — For IBS With Anxiety

Librax is a combination medication containing clidinium (an anticholinergic antispasmodic) and chlordiazepoxide (a benzodiazepine). It's sometimes used for patients whose IBS symptoms are closely tied to anxiety. The antispasmodic component works similarly to dicyclomine, while the benzodiazepine component addresses anxiety that may be worsening GI symptoms.

Important caveat: Librax is a controlled substance (Schedule IV) due to the chlordiazepoxide component. It carries a risk of physical dependence and is generally recommended for short-term use only. Dicyclomine does not have this risk.

3. Linaclotide (Linzess) — For IBS With Constipation

Linaclotide (Linzess) is a guanylate cyclase-C (GC-C) agonist approved for IBS with constipation (IBS-C) and chronic idiopathic constipation. It works by a completely different mechanism from dicyclomine — it increases fluid secretion in the intestine and speeds gut transit. Linzess is not an antispasmodic and is not a direct substitute for dicyclomine.

It may be appropriate if your IBS primarily involves constipation and you haven't had adequate response to antispasmodics. It's significantly more expensive than dicyclomine.

4. Low-Dose Amitriptyline (Elavil) — For Chronic IBS Pain

Low-dose tricyclic antidepressants (TCAs) such as amitriptyline are sometimes used for IBS, particularly when abdominal pain is severe or chronic. Amitriptyline at low doses (10–25 mg at bedtime) can reduce visceral hypersensitivity and alter gut motility. It is not an antispasmodic, so it doesn't provide the quick relief that dicyclomine can, but it may help with long-term pain management.

5. Peppermint Oil Capsules — An OTC Option

Enteric-coated peppermint oil capsules are available over the counter and have demonstrated antispasmodic activity in clinical studies. Peppermint oil relaxes smooth muscle in the gut through calcium channel inhibition. While not as potent as prescription antispasmodics, it is an option for mild to moderate IBS symptoms, particularly for patients who want to avoid prescription side effects.

Side-by-Side Comparison

Dicyclomine: Anticholinergic, daily dosing, widely available generic, not controlled, $3–$20 cash price.

Hyoscyamine: Anticholinergic, faster onset, sublingual available, not controlled, $10–$50 cash price.

Librax: Anticholinergic + benzodiazepine, Schedule IV controlled substance, short-term use.

Linzess: GC-C agonist for IBS-C only, different mechanism, significantly higher cost.

Amitriptyline: TCA for chronic IBS pain, not an acute antispasmodic, taken at bedtime.

Peppermint oil: OTC, mild antispasmodic, good for mild symptoms, no prescription needed.

Before Switching: Try to Find Dicyclomine First

If the reason you're considering an alternative is that your pharmacy doesn't have dicyclomine, it may be worth making a few calls before asking for a prescription change. medfinder can call pharmacies near you to find which ones have your exact dicyclomine dosage in stock and text you the results, saving you time and frustration.

The Bottom Line

Hyoscyamine is the most direct alternative to dicyclomine for IBS antispasmodic treatment. Other options exist depending on your IBS subtype and symptom pattern. Always consult your prescriber before making a switch, and check out our guide to finding dicyclomine in stock near you if availability is the issue.