Medicinal bottle and graduated cup with liquid solution, vector illustration.

Suspensions and Solutions


Improving patient experience and compliance

Better drug design and delivery options can help improve the likelihood that patients will be more willing to take their medications as prescribed.

Suspensions are defined as finely divided undissolved drugs dispersed in liquid vehicles. They can be a ready-to-use liquid suspension or a dry powder reconstitutable suspension, which is dispersed in water by the patient, a caregiver or a pharmacist. Solutions are defined as liquid preparations in which the drug and the various excipients are dissolved in the suitable solvent or aqueous system.

In these formulations, several of the following ingredients are typically added to support the delivery and experience of the API, including:

  • Suspending agent and/or viscosifier
  • Protective colloid
  • Wetting agent
  • Buffer and/or sequestrant
  • Preservative
  • Sweetener, coloring agent and flavor

IFF can help you differentiate your offerings in this category with specialized solutions that deliver key functionalities.

  • Avicel® colloidal MCC is produced by co-processing microcrystalline cellulose (MCC) and sodium carboxymethylcellulose (NaCMC). It is used in pharmaceutical suspensions, emulsions, nasal sprays, and creams. The wide range of thixotropies, viscosities, gel strengths, and dispersion characteristics of this product line deliver unparalleled functional versatility and physical stability of suspensions.
  • GRINDSTED® Xanthan gum is a very effective thickener and suspending agent. It provides desired rheological characteristics and ensures formulation homogeneity at very low use levels. Improved sensory attributes, like appealing mouthfeel, is another reason to include this excipient in liquid dosage forms.
  • TEXTURECEL™ sodium carboxymethylcellulose (NaCMC) controls the rheological (flow) properties in a variety of liquid dosage forms. It is an excellent choice for viscosity control, suspension stabilization, improved mouthfeel, water absorption or water retention as required.
  • METHOCEL™ water-soluble cellulose ethers are excellent thickeners, suspend solids, lubricate and retain moisture. The protective colloid action and emulsifying properties of METHOCEL™ cellulose ethers also benefit many liquid formulations.

Benefits of Suspensions and Solutions:

  • Preferred for patients, geriatric and pediatric, who have difficulty in swallowing solids such as tablets and capsules.
  • Bioavailability is usually higher than with most of the other delivery forms.
  • Improved chemical stability compared to other solutions.
  • Unpleasant taste can often be overcome by purposefully limiting the amount of drug in solution and by flavoring the liquid vehicle.

Here’s how we can deliver the functionality and variety you need for your suspension and solution formulations.


Product Recommendations*

Dosage form


Product Recommendation


Rheology modifier, stability improvement, thixotropy 

Avicel® RC-591, Avicel® CL-611

GRINDSTED® Xanthan 80 PRM+, GRINDSTED® Xanthan 200 PRM+, GRINDSTED® Xanthan Easy PRM, GRINDSTED® Xanthan Clear 80 PRM

TEXTURECEL™ 1,000 PA 07, TEXTURECEL™ 2,000 PA 07, TEXTURECEL™ PRM 2,400 PA 07, TEXTURECEL™ 4,000 PA 07, TEXTURECEL™ 20,000 PA 07



Protanal® CR8133, Manucol® LKX

Gelcarin® and Viscarin® carrageenan


Rheology modifier 

METHOCEL™ LV cellulose ethers



Protanal®, Manucol®, Manugel®, Protanal® ester alginates

Gelcarin®, Viscarin®, and SeaSpen® carrageenan

*Examples only and not representative of a complete list of recommended products or benefits.


Application Areas

We want to help you be successful in whatever application you are considering, so please contact us if you need more assistance.  Our experts are eager to tackle your challenges.

If you’re looking to fuse liquid or semi-solid format into your portfolio, let’s work together. Through our expansive portfolio, deep technical expertise and robust regulatory support, we help you meet patient needs in the right format at the right time – every time. Watch this video to learn more. 


Various pharmaceutical tablets and capsules
The premier microcrystalline cellulose (MCC) for tablet binders and suspension aids
topicals 2.png
Delivering efficient and robust formulations
Water soluble polymers for pharmaceutical applications.
Versatile, marketing-leading excipient for a nearly endless number of pharma applications
Oral liquid dosage image.png
Versatile product for solid, semi-solid and liquid dosage forms

More Dosage Forms and Applications

Solutions for the formulation of tablets to support manufacturing complexities – OSD processes, functionality and bioavailability.
Plant-based ingredients to formulate solid oral dosage forms in an array of capsule sizes.
Deliver miniature doses with massive performance in a variety of release profiles and unique drug form combinations.
Additional dosage form solutions include: dissolving medication strips, thin film drug delivery, topical applications and more.
Using our expertise to deliver results across interesting applications

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