The results of our computations with the initial cavity state as in eq. 8 are summarized in Fig. where we show the ⟨P iso ⟩ scaled by the respective cavity-off values for three choices of the wavepacket center with fixed cavity-system coupling strength η = 0.06. The corresponding unscaled ⟨P iso ⟩ shown in Fig. indicates the extent of modulation for the different initial states with varying cavity frequency. Although not apparent from the unscaled ⟨P iso ⟩, Fig. (a) does show that cavitymediated enhancement and suppression are both possible for different choices of the initial state. For example, for q i = -0.9 (the initial state considered by Fischer et al) the isomerization probability is enhanced by nearly a factor of two for ω c < ω 10 and, as noted before , about an order of magnitude suppression for ω c ≈ ω R . In con-trast, the initial state with q i = -0.602 exhibits enhancement over the entire range of cavity frequencies shown, whereas the initial state with q i = -0.439 shows relatively smaller enhancement. We note that the Fig. )-(e) are representative examples, and our study of other initial states shows similar behaviors. A consequence of the results shown in Fig. ) is that the dynamical localization (η, ω c )-landscape shown in the earlier study (Figure (c) of ref ) is sensitive to the choice of the initial vibropolariton wavepacket. Note that the reactant well harmonic frequency ω R ≈ 1182 cm -1 is nearly independent of the coupling strength. Interestingly, the minimum of ⟨P iso ⟩ does not correspond to the dipole mediated 0 + → 1 -bright transition frequency ω 10 ≈ 1039 cm -1 .