Velosef (Cephradine) is a semisynthetic cephalosporin antibiotic; oral dosage forms include capsules containing 250 mg and 500 mg cephradine and cephradine for oral suspension containing, after constitution, 125 mg and 250 mg per 5 mL dose.

Cephradine is designated chemically as (6R,7R)-7-[(R)2-amino-2-(1,4-cyclohexadien-1-yl)acetamido]-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid.

It has the following molecular formula C₁₆H₁₉N₃O₄S with a molecular weight of 349.40.

Inactive Ingredients

Velosef Capsules - colorants (FD&C Red No. 33 and Yellow No.10; FD&C Blue No.1, and, for '250'only, Red No.3, gelatin, lactose, magnesium stearate, talc, and titanium dioxide.

Velosef for Oral Suspension - citric acid, colorants, (FD&C Red No.40 for '250' only; FD&C Yellow No.6 for '125' only), flavors, guar gum, methylcellulose, sodium citrate, and sucrose.

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