NOLVABOLIC - Tamoxifen Citrate 20mg Tablets by Cooper Pharma. An anti-estrogenic agent that blocks peripheral estrogen functions and prevents normal feedback inhibition of estrogen synthesis. Composition: Each tablet contains Tamoxifen Citrate 20mg. Dosage: Initial dose 10mg twice daily, may increase to 20mg twice daily if no response within one month. Presentation: 3 x 10 tablets in blister packs.