Citalopram (Citalopram Hydrochloride) is the active ingredient in all generic and brand‑name preparations (e.g., Celexa®).
Below is a quick reference for the most common excipients that you’ll find in the tablets or capsules that are typically available in the United States and many other markets. Keep in mind that the exact list can vary by manufacturer, dosage form (tablet, capsule, oral suspension, etc.), and country of origin, so it’s always safest to read the “Ingredients” or “Drug Facts” panel on the specific package you’re taking.
| Category | Typical Excipients (Tablet/Capsule) | Typical Excipients (Oral Suspension) | Notes |
|----------|-------------------------------------|--------------------------------------|-------|
| Binders / Carriers | 1‑Methyl‑2‑pyrrolidone (NMP) (very low‑dose, in some U.S. tablets)
Hydroxypropyl cellulose (HPC) | – | NMP is present in trace amounts (≤10 µg/tablet) and is considered safe. |
| | Lactose monohydrate (often 15‑30 mg/tablet) | – | Lactose is common; people with lactose intolerance should check. |
| | Microcrystalline cellulose (MCC) | – | Standard filler. |
| | Dicalcium phosphate (Ca₂HPO₄) | – | Filler/carrier. |
| | Starch (corn or wheat) | – | Alternative filler. |
| Disintegrants / Lubricants | Sodium starch glycolate (SSG) | – | Helps tablets break up quickly. |
| | Magnesium stearate | – | Lubricant that improves tablet manufacturing. |
| | Stearic acid | – | Lubricant. |
| | Talc (in some generic versions) | – | Lubricant; check label. |
| Coatings / Palisades | Polyethylene glycol (PEG) | – | Tablet coating. |
| | Hypromellose (HPMC) | – | Coating. |
| | Titanium dioxide | – | White pigment. |
| Flavor / Color (Oral Suspensions) | Sucrose or artificial sweeteners | – | For taste. |
| | Artificial colors (e.g., FD&C Red 40) | – | For appearance. |
| | Preservatives (e.g., sodium benzoate) | – | Shelf‑life extension. |
Why the ingredients matter
- Allergies / Intolerances – Lactose, starch, and other excipients can trigger reactions in sensitive individuals.
- Drug‑Drug Interactions – Rarely, excipients can affect absorption (e.g., magnesium stearate can delay dissolution).
- Special Populations – Children, people with celiac disease, or those on a lactose‑free diet might need a specific formulation.
How to find the exact list for your bottle
1. Check the label – The “Drug Facts” or “Ingredients” section lists everything in the active and inactive components.
2. Ask your pharmacist – They can provide a detailed breakdown or confirm if a particular excipient is present.
3. Manufacturer’s website – Most brands publish a PDF of the “Product Information” or “Labeling” that lists all ingredients.
Quick FAQ
| Question | Answer |
|----------|--------|
| Is the NMP in citalopram harmful? | It’s used in a very small, trace amount (≤10 µg/tablet). Regulatory agencies consider it safe for most patients. |
| Can I take a lactose‑free citalopram? | Yes, many manufacturers offer lactose‑free versions. |
| Does magnesium stearate affect absorption? | In most cases it does not significantly alter bioavailability for citalopram. |
If you have a specific brand or formulation in mind, let me know and I can drill down into the exact excipient list for that product.