Short answer. Generally no. Section 98 says the Revised Penal Code does not apply to offences under the drug law, except in the case of minor offenders. So Penal Code doctrines and modifying circumstances do not automatically carry over to drug prosecutions, with a special penalty rule reserved for minors.
What the law says
the provisions of the Revised Penal Code (Act No. 3814), as amended, shall not apply to the provisions of this Act, except in the case of minor offenders
RA 9165, Section 98 — Limited Application Of Penal Code. Read the full provision →
The drug law is largely self-contained
People often assume the familiar rules of the Revised Penal Code — its mitigating and aggravating circumstances, its scheme for graduating penalties — apply to every crime. Section 98 says otherwise for drug offences. Notwithstanding any law, rule or regulation to the contrary, the provisions of the Revised Penal Code shall not apply to the provisions of this Act, except in the case of minor offenders. The drug law is written to stand on its own terms, so its penalties are generally applied as the statute fixes them rather than being reshaped by Penal Code machinery.
What the exclusion means in practice
The practical effect is that a defendant cannot simply reach for the Penal Code's ordinary tools and expect them to soften a drug penalty. Because the special law displaces the Code, the modifying circumstances and the graduated-penalty rules that would apply to an ordinary felony do not operate in the same way here. That is a common misunderstanding worth correcting early, since strategies that assume Penal Code treatment can be misplaced in a prosecution governed by this Act. The exclusion is the general rule; the minor-offender clause is the single carve-out.
The exception for minors, and the death-penalty note
For a minor offender the Code does come into play, and the section adds a specific penalty rule. As enacted it says that where the offender is a minor, acts punishable by life imprisonment to death shall carry reclusion perpetua to death. That upper end can no longer be imposed: Republic Act No. 9346 (2006) prohibited the death penalty and substituted reclusion perpetua. So the real ceiling today is reclusion perpetua, not death, even though the section still prints the original wording, and the treatment of child offenders is further governed by the juvenile-justice law.
Why this matters to a defence
Because the general rule cuts off the Penal Code, whether a particular doctrine or circumstance is even available in a drug case is itself a threshold question, not a given. That is precisely the kind of point where an assumption carried over from ordinary criminal cases can lead a person astray. Anyone facing a charge under the Act — and especially any case involving a minor, where the exception and the juvenile-justice framework overlap — should have the applicable penalty rules confirmed with counsel rather than assumed from general Penal Code knowledge.