HELIDAC Therapy consists of 112 bismuth subsalicylate 262.4-mg chewable tablets, 56 metronidazole 250-mg tablets, USP, and 56 tetracycline hydrochloride 500-mg capsules, USP, for oral administration.
Bismuth subsalicylate chewable tablets: Each pink round tablet contains
262.4 mg bismuth subsalicylate (102 mg salicylate) for oral administration.
Bismuth subsalicylate is a fine, white, odorless, and tasteless powder that is stable and non-hygroscopic. It is a highly insoluble salt of trivalent bismuth and salicylic acid.
Bismuth subsalicylate is 2-Hydroxybenzoic acid bismuth (3+) salt with the following
structural formula:
Molecular weight: 362.11
Inactive Ingredients: Each bismuth subsalicylate chewable tablet contains
calcium carbonate, D&C Red No. 27 aluminum lake, flavor, magnesium stearate,
mannitol, povidone, saccharin sodium, and talc.
Metronidazole tablets, USP: Each round, white tablet contains 250 mg metronidazole.
Metronidazole is 2-Methyl-5-nitroimidazole-1-ethanol, with the following structural
formula:
Inactive Ingredients: Each metronidazole tablet contains colloidal silicon
dioxide, crospovidone, stearic acid, magnesium stearate and microcrystalline
cellulose
Tetracycline hydrochloride capsules, USP: Each black and yellow capsule
contains 500 mg tetracycline hydrochloride. Tetracycline is a yellow, odorless,
crystalline powder. Tetracycline is stable in air but exposure to strong sunlight
causes it to darken. Its potency is affected in solutions of pH below 2 and
is rapidly destroyed by alkali hydroxide solutions. Tetracycline is very slightly
soluble in water, freely soluble in dilute acid and in alkali hydroxide solutions,
sparingly soluble in alcohol, and practically insoluble in chloroform and ether.
Tetracycline hydrochloride is (4S,4aS,5aS,6S,12aS)-4-(Dimethylamino)-1,4,4a,5,5a,6,11,12a-octahydro-3,6,10,12,12a-pentahydroxy-6-methyl-1,11-dioxo-2-naphthacenecarboxamide
monohydrochloride, with the following structural formula:
Inactive Ingredients: Each tetracycline hydrochloride capsule contains lactose, magnesium stearate and sodium lauryl sulfate; D & C yellow no.10, FD & C blue No 1, FD & C red no. 40, gelatin and titanium dioxide. It may also contain benzyl alcohol, butylparaben, edetate calcium disodium, FD & C yellow no. 6, methylparaben, propylparaben, silicon dioxide and sodium propionate.
What are the possible side effects of bismuth subsalicylate, metronidazole, and tetracycline (Helidac)?
If you experience any of the following serious side effects, stop taking bismuth subsalicylate, metronidazole, and tetracycline and seek emergency medical attention:
- an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives);
- a severe headache;
- vision changes;
- confusion;
- liver damage (yellowing of the skin or eyes, nausea, abdominal pain or discomfort, unusual bleeding or bruising,...
Read All Potential Side Effects and See Pictures of Helidac »
What are the precautions when taking bismuth subsalicylate (Helidac)?
Before taking this product, tell your doctor or pharmacist if you are allergic to bismuth subsalicylate, metronidazole, or tetracycline; or to aspirin or salicylates; or to other nitroimidazoles (e.g., tinidazole); or to other tetracyclines (e.g., doxycycline); or to other bismuth products; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: kidney disease, liver disease.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: blood disorders, diabetes,...
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Last reviewed on RxList: 12/7/2009
This monograph has been modified to include the generic and brand name in many instances.