Pharmaceutical Composition Based on Guar Gum and Other Antacids for Protection of the Oesogastroduodenal Mucous Membrane

An object of the present invention is a novel pharmaceutical composition based on active therapeutical substances for protection of the oesogastroduodenal mucous membrane.

In their conventional presentation, the protective compositions for the oesogastroduodenal mucous membrane are in different forms. They can for example be in suspension, granulates, tablets, powder. However in spite of these various presentations the result sought after is not reached since the purely physical phase is not always obtained and the dispersion is not good, which does not provide a good lining of the mucous membranes.

Moreover the various antacids used and their associations do not cover reasonably the various pH regions likely to appear in a patient.

According to the invention there is used, as a pH 1 to pH 0.8 antacid, guar gum to which can be added various other antacid agents.

According to another feature of the invention, the various antacids added to the guar gum are aluminum hydroxide, magnesium hydroxide, calcium carbonate and the corresponding oxides, as well as any other salts, oxides and hydroxides therapeutically active for protection of the oesogastroduodenal mucous membrane.

Various other features of the invention will become more apparent from the following detailed description.

Hereafter are given several examples of the novel pharmaceutical composition from guar gum, aluminum hydroxide, Mg hydroxide and one or several active components which can also contain gelling agents, sweeteners and flavoring agents.

Ingestable pharmaceutical composition:

Aluminum hydroxide: 1,000 g

Guar gum in powder: 2,478 g

Silicone oil: 12.5 g

Sorbitan monooleate: 6.44 g

Polysorbate 80: 3.22 g

Micronized silica: 50 g

Sugar: 6,000 g

Sodium saccharinate: 10 g

Sodium cyclamate: 40 g

Coconut (aroma in powder): 200 g

When the patient mixes the product thus obtained in an aqueous phase, the guar gum disperses and then swells, and at the moment of the swelling, captures the alumina hydroxide. This phenomenom continues in vivo.

It will be remarked in this example that the guar gum can be reduced in quantity and added notably with alginates, gelatine, gums and celluloses.

But it is remarkable to notice that the product obtained is in all cases of a fine aspect, produced rapidly and without irregularities. It can be easily conditioned and preserved in containers, with a view of its dispersion when used, or transformed into any convenient galenical form such as tablets, sachets, etc.

In all cases, if the present composition is dispersed in a liquid medium, for example water, whatever the proportions between the product and the water, the distribution will be rapidly obtained in the cold state, in a homogeneous way, without particular apparatus. The consistence of the gel obtained will vary with a given product, both with time and with the relative quantities of powder and water.

For so doing, it suffices to make up the mixture progressively and then to stir the mixture with a spoon or with the small measure used for metering the dose, until is obtained a first degree of gel thicknening.

A pharmaceutical composition is practically identical if the 1,000 g of aluminum hydroxide are replaced by 500 g of aluminum hydroxide plus 500 g of magnesium hydroxide.

The antacid activity of the guar gum imparts the product with a very interesting activity. Actually, the hereabove cited examples show a very wide antacid activity zone.

The following formula enables to define four antacid activity zones:

(a) magnesium hydroxide: 0.5 g

(b) aluminum hydroxide: 0.5 g

(c) aluminum phosphate: 0.3 g

(g) guar gum (coated or not coated) 0.2 g

and three buffer power zones:

(a) from pH 3.5 to pH 3

(b) from pH 2 to pH 1.6

(c) from pH 1 to pH 0.8

The pH measuring technique is that of Vattier.

This composition has other advantages and, notably slow activity release kinetics: 30 minutes and even after this period there remains from 36 to 60% of activity according to the intervention pH.

To these four antacids can be associated various substances such as simethicone which has an excellent activity on meteorism and gases.

Various antacids can be associated with the guar gum.

The tests made on animals with the described formula have given excellent results and have shown for example that, with the rat as well as with the dog to which agents causing a quick ulceration of the gastric mucous membrane have been administered per os, a treatment of two or three weeks with the composition according to the invention led to a complete recovery or at least to a marked reduction of the ulcerations.

At present and although the clinical tests made on man are not complete, the composition according to the invention enables defining with precision, in more than 90% of the clinical cases observed, a quick and sometimes definitive amelioration of the portions of the oesogastroduodenal mucous membrane attacked.

In this respect, the composition of Example 3 has been found totally efficaceous on three patients to which Pentagastrine.TM. has been injected.

The composition of Example 3 enabled to treat two patents having hpersecretions of the gastric mucous corresponding to important hyperacidity.

The posology was three tablets a day during 15 days .