Astanga Hrudaya
वृष्यादीनि प्रभावेण सद्यः शुक्रादि कुर्वते। प्रायः करोत्यहोरात्रात्कर्मान्यदपि भेषजम्॥६७॥
Contiuned cyclic nutrition of tissues: Aphrodisiacs (drugs etc) by their special effects, produce sukra etc. immediately probably other medicines also produce their actions (effects) by a day and night
english translation