Mannitol is a sugar alcohol commonly used as an excipient in pharmaceutical formulations [1]. It serves as a bulking agent, diluent, and sweetening agent [2]. Mannitol is also used in orally disintegrating tablets due to its ability to dissolve rapidly in the mouth [3].
Why is Mannitol Used in Tablets?
Mannitol's properties make it a valuable excipient for various tablet manufacturing processes [1]. Its crystalline structure provides good compressibility, which is essential for tablet formation [4]. In orally disintegrating tablets, its rapid dissolution rate enhances patient compliance [3]. Additionally, mannitol can be used as a vehicle for active pharmaceutical ingredients in both oral and parenteral dosage forms [2].
Can Mannitol Be Used in Injectable Medications?
Yes, mannitol is approved for use in injectable medications [2]. It functions as an osmotic diuretic to reduce intracranial pressure and is also used in ophthalmic preparations to lower intraocular pressure [5].
What Are the Side Effects of Mannitol?
When administered intravenously, mannitol can cause side effects such as fluid and electrolyte imbalances, headaches, and dizziness [5]. In rare cases, it can lead to more severe reactions like kidney failure or allergic reactions [6]. When used as an oral excipient, the gastrointestinal tract is the primary site of potential side effects, such as diarrhea, due to its osmotic properties [7].
How is Mannitol Manufactured?
Mannitol is typically produced by the catalytic hydrogenation of fructose or glucose [8]. It can also be derived from natural sources like seaweed or fruits [9].
What Are Alternatives to Mannitol as an Excipient?
Other sugar alcohols like sorbitol and xylitol can be used as alternatives to mannitol, offering similar properties [2]. Lactose and microcrystalline cellulose are also common diluents used in tablet formulations [4]. The choice of alternative depends on the specific requirements of the drug product, such as compressibility, solubility, and taste [3][4].